CVE-2022-50341 (GCVE-0-2022-50341)
Vulnerability from cvelistv5 – Published: 2025-09-16 16:11 – Updated: 2026-08-05 08:58
VLAI
EPSS
VEX
Title
cifs: fix oops during encryption
Summary
In the Linux kernel, the following vulnerability has been resolved:
cifs: fix oops during encryption
When running xfstests against Azure the following oops occurred on an
arm64 system
Unable to handle kernel write to read-only memory at virtual address
ffff0001221cf000
Mem abort info:
ESR = 0x9600004f
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x0f: level 3 permission fault
Data abort info:
ISV = 0, ISS = 0x0000004f
CM = 0, WnR = 1
swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000294f3000
[ffff0001221cf000] pgd=18000001ffff8003, p4d=18000001ffff8003,
pud=18000001ff82e003, pmd=18000001ff71d003, pte=00600001221cf787
Internal error: Oops: 9600004f [#1] PREEMPT SMP
...
pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--)
pc : __memcpy+0x40/0x230
lr : scatterwalk_copychunks+0xe0/0x200
sp : ffff800014e92de0
x29: ffff800014e92de0 x28: ffff000114f9de80 x27: 0000000000000008
x26: 0000000000000008 x25: ffff800014e92e78 x24: 0000000000000008
x23: 0000000000000001 x22: 0000040000000000 x21: ffff000000000000
x20: 0000000000000001 x19: ffff0001037c4488 x18: 0000000000000014
x17: 235e1c0d6efa9661 x16: a435f9576b6edd6c x15: 0000000000000058
x14: 0000000000000001 x13: 0000000000000008 x12: ffff000114f2e590
x11: ffffffffffffffff x10: 0000040000000000 x9 : ffff8000105c3580
x8 : 2e9413b10000001a x7 : 534b4410fb86b005 x6 : 534b4410fb86b005
x5 : ffff0001221cf008 x4 : ffff0001037c4490 x3 : 0000000000000001
x2 : 0000000000000008 x1 : ffff0001037c4488 x0 : ffff0001221cf000
Call trace:
__memcpy+0x40/0x230
scatterwalk_map_and_copy+0x98/0x100
crypto_ccm_encrypt+0x150/0x180
crypto_aead_encrypt+0x2c/0x40
crypt_message+0x750/0x880
smb3_init_transform_rq+0x298/0x340
smb_send_rqst.part.11+0xd8/0x180
smb_send_rqst+0x3c/0x100
compound_send_recv+0x534/0xbc0
smb2_query_info_compound+0x32c/0x440
smb2_set_ea+0x438/0x4c0
cifs_xattr_set+0x5d4/0x7c0
This is because in scatterwalk_copychunks(), we attempted to write to
a buffer (@sign) that was allocated in the stack (vmalloc area) by
crypt_message() and thus accessing its remaining 8 (x2) bytes ended up
crossing a page boundary.
To simply fix it, we could just pass @sign kmalloc'd from
crypt_message() and then we're done. Luckily, we don't seem to pass
any other vmalloc'd buffers in smb_rqst::rq_iov...
Instead, let's map the correct pages and offsets from vmalloc buffers
as well in cifs_sg_set_buf() and then avoiding such oopses.
Severity
7.8 (High)
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:19 UTC
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398 , < e8e2861cc3258dbe407d01ea8c59bb5a53132301
(git)
Affected: 026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398 , < fe6ea044c4f05706cb71040055b1c70c6c8275e0 (git) Affected: 026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398 , < bf0543b93740916ee91956f9a63da6fc0d79daaa (git) Affected: 026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398 , < a13e51760703f71c25d5fc1f4a62dfa4b0cc80e9 (git) Affected: 026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398 , < e8d16a54842d609fd4a3ed2d81d4333d6329aa94 (git) Affected: 026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398 , < f7f291e14dde32a07b1f0aa06921d28f875a7b54 (git) |
guessed | |
| Linux | Linux |
Affected:
4.11
Unaffected: 0 , < 4.11 (semver) Unaffected: 5.4.229 , ≤ 5.4.* (semver) Unaffected: 5.10.163 , ≤ 5.10.* (semver) Unaffected: 5.15.87 , ≤ 5.15.* (semver) Unaffected: 6.0.16 , ≤ 6.0.* (semver) Unaffected: 6.1.1 , ≤ 6.1.* (semver) Unaffected: 6.2 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2022-50341",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-14T18:19:48.496611Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-noinfo Not enough information",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-01-14T18:22:57.726Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/cifs/cifsglob.h",
"fs/cifs/cifsproto.h",
"fs/cifs/misc.c",
"fs/cifs/smb2ops.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "e8e2861cc3258dbe407d01ea8c59bb5a53132301",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
},
{
"lessThan": "fe6ea044c4f05706cb71040055b1c70c6c8275e0",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
},
{
"lessThan": "bf0543b93740916ee91956f9a63da6fc0d79daaa",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
},
{
"lessThan": "a13e51760703f71c25d5fc1f4a62dfa4b0cc80e9",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
},
{
"lessThan": "e8d16a54842d609fd4a3ed2d81d4333d6329aa94",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
},
{
"lessThan": "f7f291e14dde32a07b1f0aa06921d28f875a7b54",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/cifs/cifsglob.h",
"fs/cifs/cifsproto.h",
"fs/cifs/misc.c",
"fs/cifs/smb2ops.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.11"
},
{
"lessThan": "4.11",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.229",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.163",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.87",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.0.*",
"status": "unaffected",
"version": "6.0.16",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.1",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.229",
"versionStartIncluding": "4.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.163",
"versionStartIncluding": "4.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.87",
"versionStartIncluding": "4.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.0.16",
"versionStartIncluding": "4.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.1",
"versionStartIncluding": "4.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.2",
"versionStartIncluding": "4.11",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix oops during encryption\n\nWhen running xfstests against Azure the following oops occurred on an\narm64 system\n\n Unable to handle kernel write to read-only memory at virtual address\n ffff0001221cf000\n Mem abort info:\n ESR = 0x9600004f\n EC = 0x25: DABT (current EL), IL = 32 bits\n SET = 0, FnV = 0\n EA = 0, S1PTW = 0\n FSC = 0x0f: level 3 permission fault\n Data abort info:\n ISV = 0, ISS = 0x0000004f\n CM = 0, WnR = 1\n swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000294f3000\n [ffff0001221cf000] pgd=18000001ffff8003, p4d=18000001ffff8003,\n pud=18000001ff82e003, pmd=18000001ff71d003, pte=00600001221cf787\n Internal error: Oops: 9600004f [#1] PREEMPT SMP\n ...\n pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--)\n pc : __memcpy+0x40/0x230\n lr : scatterwalk_copychunks+0xe0/0x200\n sp : ffff800014e92de0\n x29: ffff800014e92de0 x28: ffff000114f9de80 x27: 0000000000000008\n x26: 0000000000000008 x25: ffff800014e92e78 x24: 0000000000000008\n x23: 0000000000000001 x22: 0000040000000000 x21: ffff000000000000\n x20: 0000000000000001 x19: ffff0001037c4488 x18: 0000000000000014\n x17: 235e1c0d6efa9661 x16: a435f9576b6edd6c x15: 0000000000000058\n x14: 0000000000000001 x13: 0000000000000008 x12: ffff000114f2e590\n x11: ffffffffffffffff x10: 0000040000000000 x9 : ffff8000105c3580\n x8 : 2e9413b10000001a x7 : 534b4410fb86b005 x6 : 534b4410fb86b005\n x5 : ffff0001221cf008 x4 : ffff0001037c4490 x3 : 0000000000000001\n x2 : 0000000000000008 x1 : ffff0001037c4488 x0 : ffff0001221cf000\n Call trace:\n __memcpy+0x40/0x230\n scatterwalk_map_and_copy+0x98/0x100\n crypto_ccm_encrypt+0x150/0x180\n crypto_aead_encrypt+0x2c/0x40\n crypt_message+0x750/0x880\n smb3_init_transform_rq+0x298/0x340\n smb_send_rqst.part.11+0xd8/0x180\n smb_send_rqst+0x3c/0x100\n compound_send_recv+0x534/0xbc0\n smb2_query_info_compound+0x32c/0x440\n smb2_set_ea+0x438/0x4c0\n cifs_xattr_set+0x5d4/0x7c0\n\nThis is because in scatterwalk_copychunks(), we attempted to write to\na buffer (@sign) that was allocated in the stack (vmalloc area) by\ncrypt_message() and thus accessing its remaining 8 (x2) bytes ended up\ncrossing a page boundary.\n\nTo simply fix it, we could just pass @sign kmalloc\u0027d from\ncrypt_message() and then we\u0027re done. Luckily, we don\u0027t seem to pass\nany other vmalloc\u0027d buffers in smb_rqst::rq_iov...\n\nInstead, let\u0027s map the correct pages and offsets from vmalloc buffers\nas well in cifs_sg_set_buf() and then avoiding such oopses."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - This is CIFS/SMB3 client encryption in fs/cifs, reached via local filesystem operations on an already-mounted share, not a network-facing server like ksmbd/nfsd.\nAC:L - An attacker with access to an encrypted SMB3 mount can repeatedly issue operations that encrypt (or decrypt) messages; VMAP_STACK is default on x86_64/arm64, and the page-boundary condition is reliably hittable (as in the reported xfstests oops), including via retries under kstack offset randomization.\nPR:L - An unprivileged local user who can access a mounted encrypted CIFS/SMB3 share (common for Azure Files and enterprise mounts) can trigger the path via setxattr or other ordinary filesystem operations without root.\nUI:N - The attacker themselves performs the filesystem operation that drives encryption; no separate victim action is required beyond the pre-existing encrypted mount.\nS:U - The corruption and crash stay within the local kernel\u2019s security authority; this is not a VM/IOMMU/sandbox boundary crossing.\nC:H - The flaw is an out-of-bounds write into an unintended kernel page via scatterwalk\u2019s page+1 advance on a mis-mapped vmalloc buffer, which is memory corruption that can be leveraged for information disclosure.\nI:H - scatterwalk writes the AEAD signature across a page boundary into the wrong page frame (sg_page+1), which is an out-of-bounds kernel write exploitable for integrity compromise and control-flow hijacking.\nA:H - The bug produces a demonstrable kernel oops (write to read-only memory during crypto_ccm_encrypt), so availability impact is High."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T08:58:18.553Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/e8e2861cc3258dbe407d01ea8c59bb5a53132301"
},
{
"url": "https://git.kernel.org/stable/c/fe6ea044c4f05706cb71040055b1c70c6c8275e0"
},
{
"url": "https://git.kernel.org/stable/c/bf0543b93740916ee91956f9a63da6fc0d79daaa"
},
{
"url": "https://git.kernel.org/stable/c/a13e51760703f71c25d5fc1f4a62dfa4b0cc80e9"
},
{
"url": "https://git.kernel.org/stable/c/e8d16a54842d609fd4a3ed2d81d4333d6329aa94"
},
{
"url": "https://git.kernel.org/stable/c/f7f291e14dde32a07b1f0aa06921d28f875a7b54"
}
],
"title": "cifs: fix oops during encryption",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-50341",
"datePublished": "2025-09-16T16:11:20.838Z",
"dateReserved": "2025-09-16T16:03:27.881Z",
"dateUpdated": "2026-08-05T08:58:18.553Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2022-50341",
"date": "2026-09-18",
"epss": "0.00107",
"percentile": "0.0129"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/cifs/cifsglob.h",
"fs/cifs/cifsproto.h",
"fs/cifs/misc.c",
"fs/cifs/smb2ops.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "e8e2861cc3258dbe407d01ea8c59bb5a53132301",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
},
{
"lessThan": "fe6ea044c4f05706cb71040055b1c70c6c8275e0",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
},
{
"lessThan": "bf0543b93740916ee91956f9a63da6fc0d79daaa",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
},
{
"lessThan": "a13e51760703f71c25d5fc1f4a62dfa4b0cc80e9",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
},
{
"lessThan": "e8d16a54842d609fd4a3ed2d81d4333d6329aa94",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
},
{
"lessThan": "f7f291e14dde32a07b1f0aa06921d28f875a7b54",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/cifs/cifsglob.h",
"fs/cifs/cifsproto.h",
"fs/cifs/misc.c",
"fs/cifs/smb2ops.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.11"
},
{
"lessThan": "4.11",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.229",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.163",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.87",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.0.*",
"status": "unaffected",
"version": "6.0.16",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.1",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "35BD75DA-D55E-4B66-8E0E-4931F67E1163",
"versionEndExcluding": "5.4.229",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "D05D31FC-BD74-4F9E-B1D8-9CED62BE6F65",
"versionEndExcluding": "5.10.163",
"versionStartIncluding": "5.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "7B9E5B1C-CD46-4790-9500-615863850401",
"versionEndExcluding": "5.15.87",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "C720A569-3D93-4D77-95F6-E2B3A3267D9F",
"versionEndExcluding": "6.0.16",
"versionStartIncluding": "5.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E2D7A7B1-A69F-4536-ADFF-72B77EB8B13D",
"versionEndExcluding": "6.1.1",
"versionStartIncluding": "6.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix oops during encryption\n\nWhen running xfstests against Azure the following oops occurred on an\narm64 system\n\n Unable to handle kernel write to read-only memory at virtual address\n ffff0001221cf000\n Mem abort info:\n ESR = 0x9600004f\n EC = 0x25: DABT (current EL), IL = 32 bits\n SET = 0, FnV = 0\n EA = 0, S1PTW = 0\n FSC = 0x0f: level 3 permission fault\n Data abort info:\n ISV = 0, ISS = 0x0000004f\n CM = 0, WnR = 1\n swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000294f3000\n [ffff0001221cf000] pgd=18000001ffff8003, p4d=18000001ffff8003,\n pud=18000001ff82e003, pmd=18000001ff71d003, pte=00600001221cf787\n Internal error: Oops: 9600004f [#1] PREEMPT SMP\n ...\n pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--)\n pc : __memcpy+0x40/0x230\n lr : scatterwalk_copychunks+0xe0/0x200\n sp : ffff800014e92de0\n x29: ffff800014e92de0 x28: ffff000114f9de80 x27: 0000000000000008\n x26: 0000000000000008 x25: ffff800014e92e78 x24: 0000000000000008\n x23: 0000000000000001 x22: 0000040000000000 x21: ffff000000000000\n x20: 0000000000000001 x19: ffff0001037c4488 x18: 0000000000000014\n x17: 235e1c0d6efa9661 x16: a435f9576b6edd6c x15: 0000000000000058\n x14: 0000000000000001 x13: 0000000000000008 x12: ffff000114f2e590\n x11: ffffffffffffffff x10: 0000040000000000 x9 : ffff8000105c3580\n x8 : 2e9413b10000001a x7 : 534b4410fb86b005 x6 : 534b4410fb86b005\n x5 : ffff0001221cf008 x4 : ffff0001037c4490 x3 : 0000000000000001\n x2 : 0000000000000008 x1 : ffff0001037c4488 x0 : ffff0001221cf000\n Call trace:\n __memcpy+0x40/0x230\n scatterwalk_map_and_copy+0x98/0x100\n crypto_ccm_encrypt+0x150/0x180\n crypto_aead_encrypt+0x2c/0x40\n crypt_message+0x750/0x880\n smb3_init_transform_rq+0x298/0x340\n smb_send_rqst.part.11+0xd8/0x180\n smb_send_rqst+0x3c/0x100\n compound_send_recv+0x534/0xbc0\n smb2_query_info_compound+0x32c/0x440\n smb2_set_ea+0x438/0x4c0\n cifs_xattr_set+0x5d4/0x7c0\n\nThis is because in scatterwalk_copychunks(), we attempted to write to\na buffer (@sign) that was allocated in the stack (vmalloc area) by\ncrypt_message() and thus accessing its remaining 8 (x2) bytes ended up\ncrossing a page boundary.\n\nTo simply fix it, we could just pass @sign kmalloc\u0027d from\ncrypt_message() and then we\u0027re done. Luckily, we don\u0027t seem to pass\nany other vmalloc\u0027d buffers in smb_rqst::rq_iov...\n\nInstead, let\u0027s map the correct pages and offsets from vmalloc buffers\nas well in cifs_sg_set_buf() and then avoiding such oopses."
}
],
"id": "CVE-2022-50341",
"lastModified": "2026-08-04T10:18:11.943",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2022-50341",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-14T18:19:48.496611Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-09-16T17:15:33.660",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/a13e51760703f71c25d5fc1f4a62dfa4b0cc80e9"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/bf0543b93740916ee91956f9a63da6fc0d79daaa"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/e8d16a54842d609fd4a3ed2d81d4333d6329aa94"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/e8e2861cc3258dbe407d01ea8c59bb5a53132301"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/f7f291e14dde32a07b1f0aa06921d28f875a7b54"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/fe6ea044c4f05706cb71040055b1c70c6c8275e0"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-04T19:40:38+00:00",
"cve": "CVE-2022-50341",
"id": "CVE-2022-50341",
"initial_release_date": "2022-01-01T00:00:00+00:00",
"product_status:fixed": "883",
"product_status:known_affected": "138",
"product_status:known_not_affected": "76",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: cifs: fix oops during encryption",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50341.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-31T01:24:35Z",
"cve": "CVE-2022-50341",
"id": "CVE-2022-50341",
"initial_release_date": "2025-11-19T00:57:31Z",
"product_status:known_affected": "162",
"product_status:known_not_affected": "361",
"product_status:recommended": "62",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2022-50341",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50341.json",
"version": "11"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2022-50341",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-14T18:19:48.496611Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-noinfo Not enough information",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-01-14T18:19:44.287Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/cifs/cifsglob.h",
"fs/cifs/cifsproto.h",
"fs/cifs/misc.c",
"fs/cifs/smb2ops.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "e8e2861cc3258dbe407d01ea8c59bb5a53132301",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
},
{
"lessThan": "fe6ea044c4f05706cb71040055b1c70c6c8275e0",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
},
{
"lessThan": "bf0543b93740916ee91956f9a63da6fc0d79daaa",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
},
{
"lessThan": "a13e51760703f71c25d5fc1f4a62dfa4b0cc80e9",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
},
{
"lessThan": "e8d16a54842d609fd4a3ed2d81d4333d6329aa94",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
},
{
"lessThan": "f7f291e14dde32a07b1f0aa06921d28f875a7b54",
"status": "affected",
"version": "026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/cifs/cifsglob.h",
"fs/cifs/cifsproto.h",
"fs/cifs/misc.c",
"fs/cifs/smb2ops.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.11"
},
{
"lessThan": "4.11",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.229",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.163",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.87",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.0.*",
"status": "unaffected",
"version": "6.0.16",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.1",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.229",
"versionStartIncluding": "4.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.163",
"versionStartIncluding": "4.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.87",
"versionStartIncluding": "4.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.0.16",
"versionStartIncluding": "4.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.1",
"versionStartIncluding": "4.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.2",
"versionStartIncluding": "4.11",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix oops during encryption\n\nWhen running xfstests against Azure the following oops occurred on an\narm64 system\n\n Unable to handle kernel write to read-only memory at virtual address\n ffff0001221cf000\n Mem abort info:\n ESR = 0x9600004f\n EC = 0x25: DABT (current EL), IL = 32 bits\n SET = 0, FnV = 0\n EA = 0, S1PTW = 0\n FSC = 0x0f: level 3 permission fault\n Data abort info:\n ISV = 0, ISS = 0x0000004f\n CM = 0, WnR = 1\n swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000294f3000\n [ffff0001221cf000] pgd=18000001ffff8003, p4d=18000001ffff8003,\n pud=18000001ff82e003, pmd=18000001ff71d003, pte=00600001221cf787\n Internal error: Oops: 9600004f [#1] PREEMPT SMP\n ...\n pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--)\n pc : __memcpy+0x40/0x230\n lr : scatterwalk_copychunks+0xe0/0x200\n sp : ffff800014e92de0\n x29: ffff800014e92de0 x28: ffff000114f9de80 x27: 0000000000000008\n x26: 0000000000000008 x25: ffff800014e92e78 x24: 0000000000000008\n x23: 0000000000000001 x22: 0000040000000000 x21: ffff000000000000\n x20: 0000000000000001 x19: ffff0001037c4488 x18: 0000000000000014\n x17: 235e1c0d6efa9661 x16: a435f9576b6edd6c x15: 0000000000000058\n x14: 0000000000000001 x13: 0000000000000008 x12: ffff000114f2e590\n x11: ffffffffffffffff x10: 0000040000000000 x9 : ffff8000105c3580\n x8 : 2e9413b10000001a x7 : 534b4410fb86b005 x6 : 534b4410fb86b005\n x5 : ffff0001221cf008 x4 : ffff0001037c4490 x3 : 0000000000000001\n x2 : 0000000000000008 x1 : ffff0001037c4488 x0 : ffff0001221cf000\n Call trace:\n __memcpy+0x40/0x230\n scatterwalk_map_and_copy+0x98/0x100\n crypto_ccm_encrypt+0x150/0x180\n crypto_aead_encrypt+0x2c/0x40\n crypt_message+0x750/0x880\n smb3_init_transform_rq+0x298/0x340\n smb_send_rqst.part.11+0xd8/0x180\n smb_send_rqst+0x3c/0x100\n compound_send_recv+0x534/0xbc0\n smb2_query_info_compound+0x32c/0x440\n smb2_set_ea+0x438/0x4c0\n cifs_xattr_set+0x5d4/0x7c0\n\nThis is because in scatterwalk_copychunks(), we attempted to write to\na buffer (@sign) that was allocated in the stack (vmalloc area) by\ncrypt_message() and thus accessing its remaining 8 (x2) bytes ended up\ncrossing a page boundary.\n\nTo simply fix it, we could just pass @sign kmalloc\u0027d from\ncrypt_message() and then we\u0027re done. Luckily, we don\u0027t seem to pass\nany other vmalloc\u0027d buffers in smb_rqst::rq_iov...\n\nInstead, let\u0027s map the correct pages and offsets from vmalloc buffers\nas well in cifs_sg_set_buf() and then avoiding such oopses."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - This is CIFS/SMB3 client encryption in fs/cifs, reached via local filesystem operations on an already-mounted share, not a network-facing server like ksmbd/nfsd.\nAC:L - An attacker with access to an encrypted SMB3 mount can repeatedly issue operations that encrypt (or decrypt) messages; VMAP_STACK is default on x86_64/arm64, and the page-boundary condition is reliably hittable (as in the reported xfstests oops), including via retries under kstack offset randomization.\nPR:L - An unprivileged local user who can access a mounted encrypted CIFS/SMB3 share (common for Azure Files and enterprise mounts) can trigger the path via setxattr or other ordinary filesystem operations without root.\nUI:N - The attacker themselves performs the filesystem operation that drives encryption; no separate victim action is required beyond the pre-existing encrypted mount.\nS:U - The corruption and crash stay within the local kernel\u2019s security authority; this is not a VM/IOMMU/sandbox boundary crossing.\nC:H - The flaw is an out-of-bounds write into an unintended kernel page via scatterwalk\u2019s page+1 advance on a mis-mapped vmalloc buffer, which is memory corruption that can be leveraged for information disclosure.\nI:H - scatterwalk writes the AEAD signature across a page boundary into the wrong page frame (sg_page+1), which is an out-of-bounds kernel write exploitable for integrity compromise and control-flow hijacking.\nA:H - The bug produces a demonstrable kernel oops (write to read-only memory during crypto_ccm_encrypt), so availability impact is High."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T08:58:18.553Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/e8e2861cc3258dbe407d01ea8c59bb5a53132301"
},
{
"url": "https://git.kernel.org/stable/c/fe6ea044c4f05706cb71040055b1c70c6c8275e0"
},
{
"url": "https://git.kernel.org/stable/c/bf0543b93740916ee91956f9a63da6fc0d79daaa"
},
{
"url": "https://git.kernel.org/stable/c/a13e51760703f71c25d5fc1f4a62dfa4b0cc80e9"
},
{
"url": "https://git.kernel.org/stable/c/e8d16a54842d609fd4a3ed2d81d4333d6329aa94"
},
{
"url": "https://git.kernel.org/stable/c/f7f291e14dde32a07b1f0aa06921d28f875a7b54"
}
],
"title": "cifs: fix oops during encryption",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-50341",
"datePublished": "2025-09-16T16:11:20.838Z",
"dateReserved": "2025-09-16T16:03:27.881Z",
"dateUpdated": "2026-08-05T08:58:18.553Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…