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Title
Linux kernel存在未明漏洞（CNVD-2024-46448）
Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。
Linux kernel存在安全漏洞，该漏洞源于允许越界读取内存。目前没有详细的漏洞细节提供。
Severity
中
Patch Name
Linux kernel存在未明漏洞（CNVD-2024-46448）的补丁
Patch Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。
Linux kernel存在安全漏洞，该漏洞源于允许越界读取内存。目前没有详细的漏洞细节提供。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。
Formal description
厂商已发布了漏洞修复程序，请及时关注更新： https://git.kernel.org/stable/c/199c20fb7499c79557a075dc24e9a7dae7d9f1ce
Reference
https://nvd.nist.gov/vuln/detail/CVE-2024-50301
Impacted products
| Name | Linux Kernel |
|---|
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"cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2024-50301"
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"isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
"number": "CNVD-2024-46448",
"openTime": "2024-11-28",
"patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5141\u8bb8\u8d8a\u754c\u8bfb\u53d6\u5185\u5b58\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
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"products": {
"product": "Linux Kernel"
},
"referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2024-50301",
"serverity": "\u4e2d",
"submitTime": "2024-11-21",
"title": "Linux kernel\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2024-46448\uff09"
}
CVE-2024-50301 (GCVE-0-2024-50301)
Vulnerability from cvelistv5 – Published: 2024-11-19 01:30 – Updated: 2026-05-12 12:00
VLAI
EPSS
Title
security/keys: fix slab-out-of-bounds in key_task_permission
Summary
In the Linux kernel, the following vulnerability has been resolved:
security/keys: fix slab-out-of-bounds in key_task_permission
KASAN reports an out of bounds read:
BUG: KASAN: slab-out-of-bounds in __kuid_val include/linux/uidgid.h:36
BUG: KASAN: slab-out-of-bounds in uid_eq include/linux/uidgid.h:63 [inline]
BUG: KASAN: slab-out-of-bounds in key_task_permission+0x394/0x410
security/keys/permission.c:54
Read of size 4 at addr ffff88813c3ab618 by task stress-ng/4362
CPU: 2 PID: 4362 Comm: stress-ng Not tainted 5.10.0-14930-gafbffd6c3ede #15
Call Trace:
__dump_stack lib/dump_stack.c:82 [inline]
dump_stack+0x107/0x167 lib/dump_stack.c:123
print_address_description.constprop.0+0x19/0x170 mm/kasan/report.c:400
__kasan_report.cold+0x6c/0x84 mm/kasan/report.c:560
kasan_report+0x3a/0x50 mm/kasan/report.c:585
__kuid_val include/linux/uidgid.h:36 [inline]
uid_eq include/linux/uidgid.h:63 [inline]
key_task_permission+0x394/0x410 security/keys/permission.c:54
search_nested_keyrings+0x90e/0xe90 security/keys/keyring.c:793
This issue was also reported by syzbot.
It can be reproduced by following these steps(more details [1]):
1. Obtain more than 32 inputs that have similar hashes, which ends with the
pattern '0xxxxxxxe6'.
2. Reboot and add the keys obtained in step 1.
The reproducer demonstrates how this issue happened:
1. In the search_nested_keyrings function, when it iterates through the
slots in a node(below tag ascend_to_node), if the slot pointer is meta
and node->back_pointer != NULL(it means a root), it will proceed to
descend_to_node. However, there is an exception. If node is the root,
and one of the slots points to a shortcut, it will be treated as a
keyring.
2. Whether the ptr is keyring decided by keyring_ptr_is_keyring function.
However, KEYRING_PTR_SUBTYPE is 0x2UL, the same as
ASSOC_ARRAY_PTR_SUBTYPE_MASK.
3. When 32 keys with the similar hashes are added to the tree, the ROOT
has keys with hashes that are not similar (e.g. slot 0) and it splits
NODE A without using a shortcut. When NODE A is filled with keys that
all hashes are xxe6, the keys are similar, NODE A will split with a
shortcut. Finally, it forms the tree as shown below, where slot 6 points
to a shortcut.
NODE A
+------>+---+
ROOT | | 0 | xxe6
+---+ | +---+
xxxx | 0 | shortcut : : xxe6
+---+ | +---+
xxe6 : : | | | xxe6
+---+ | +---+
| 6 |---+ : : xxe6
+---+ +---+
xxe6 : : | f | xxe6
+---+ +---+
xxe6 | f |
+---+
4. As mentioned above, If a slot(slot 6) of the root points to a shortcut,
it may be mistakenly transferred to a key*, leading to a read
out-of-bounds read.
To fix this issue, one should jump to descend_to_node if the ptr is a
shortcut, regardless of whether the node is root or not.
[1] https://lore.kernel.org/linux-kernel/1cfa878e-8c7b-4570-8606-21daf5e13ce7@huaweicloud.com/
[jarkko: tweaked the commit message a bit to have an appropriate closes
tag.]
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
13 references
Impacted products
9 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 , < c3ce634ad953ce48c75c39bdfd8b711dd95f346f
(git)
Affected: b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 , < 4efb69a0e294ef201bcdf7ce3d6202cd0a545a5d (git) Affected: b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 , < 1e4332581cd4eed75aea77af6f66cdcdda8b49b9 (git) Affected: b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 , < 199c20fb7499c79557a075dc24e9a7dae7d9f1ce (git) Affected: b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 , < bbad2d5b6c99db468d8f88b6ba6a56ed409b4881 (git) Affected: b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 , < 3e79ad156bedf2da0ab909a118d2cec6c9c22b79 (git) Affected: b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 , < e0a317ad68e4ea48a0158187238c5407e4fdec8b (git) Affected: b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 , < 4a74da044ec9ec8679e6beccc4306b936b62873f (git) |
|
| Linux | Linux |
Affected:
3.13
Unaffected: 0 , < 3.13 (semver) Unaffected: 4.19.324 , ≤ 4.19.* (semver) Unaffected: 5.4.286 , ≤ 5.4.* (semver) Unaffected: 5.10.230 , ≤ 5.10.* (semver) Unaffected: 5.15.172 , ≤ 5.15.* (semver) Unaffected: 6.1.117 , ≤ 6.1.* (semver) Unaffected: 6.6.61 , ≤ 6.6.* (semver) Unaffected: 6.11.8 , ≤ 6.11.* (semver) Unaffected: 6.12 , ≤ * (original_commit_for_fix) |
|
| Siemens | RUGGEDCOM RST2428P |
Affected:
0 , < V3.2
(custom)
|
|
| Siemens | SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family |
Affected:
0 , < V3.2
(custom)
|
|
| Siemens | SCALANCE XCM-/XRM-/XCH-/XRH-300 family |
Affected:
0 , < V3.2
(custom)
|
|
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem |
Affected:
0 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.0 , < V3.1.5
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.0 , < V3.1.5
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.0 , < V3.1.5
(custom)
|
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"integrityImpact": "NONE",
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},
{
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"providerMetadata": {
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"shortName": "siemens-SADP"
},
"references": [
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"url": "https://cert-portal.siemens.com/productcert/html/ssa-398330.html"
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-355557.html"
}
],
"x_adpType": "supplier"
}
],
"cna": {
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"product": "Linux",
"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"version": "5.10.230",
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},
{
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"version": "5.15.172",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.1.117",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.6.61",
"versionType": "semver"
},
{
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"version": "6.11.8",
"versionType": "semver"
},
{
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"version": "6.12",
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsecurity/keys: fix slab-out-of-bounds in key_task_permission\n\nKASAN reports an out of bounds read:\nBUG: KASAN: slab-out-of-bounds in __kuid_val include/linux/uidgid.h:36\nBUG: KASAN: slab-out-of-bounds in uid_eq include/linux/uidgid.h:63 [inline]\nBUG: KASAN: slab-out-of-bounds in key_task_permission+0x394/0x410\nsecurity/keys/permission.c:54\nRead of size 4 at addr ffff88813c3ab618 by task stress-ng/4362\n\nCPU: 2 PID: 4362 Comm: stress-ng Not tainted 5.10.0-14930-gafbffd6c3ede #15\nCall Trace:\n __dump_stack lib/dump_stack.c:82 [inline]\n dump_stack+0x107/0x167 lib/dump_stack.c:123\n print_address_description.constprop.0+0x19/0x170 mm/kasan/report.c:400\n __kasan_report.cold+0x6c/0x84 mm/kasan/report.c:560\n kasan_report+0x3a/0x50 mm/kasan/report.c:585\n __kuid_val include/linux/uidgid.h:36 [inline]\n uid_eq include/linux/uidgid.h:63 [inline]\n key_task_permission+0x394/0x410 security/keys/permission.c:54\n search_nested_keyrings+0x90e/0xe90 security/keys/keyring.c:793\n\nThis issue was also reported by syzbot.\n\nIt can be reproduced by following these steps(more details [1]):\n1. Obtain more than 32 inputs that have similar hashes, which ends with the\n pattern \u00270xxxxxxxe6\u0027.\n2. Reboot and add the keys obtained in step 1.\n\nThe reproducer demonstrates how this issue happened:\n1. In the search_nested_keyrings function, when it iterates through the\n slots in a node(below tag ascend_to_node), if the slot pointer is meta\n and node-\u003eback_pointer != NULL(it means a root), it will proceed to\n descend_to_node. However, there is an exception. If node is the root,\n and one of the slots points to a shortcut, it will be treated as a\n keyring.\n2. Whether the ptr is keyring decided by keyring_ptr_is_keyring function.\n However, KEYRING_PTR_SUBTYPE is 0x2UL, the same as\n ASSOC_ARRAY_PTR_SUBTYPE_MASK.\n3. When 32 keys with the similar hashes are added to the tree, the ROOT\n has keys with hashes that are not similar (e.g. slot 0) and it splits\n NODE A without using a shortcut. When NODE A is filled with keys that\n all hashes are xxe6, the keys are similar, NODE A will split with a\n shortcut. Finally, it forms the tree as shown below, where slot 6 points\n to a shortcut.\n\n NODE A\n +------\u003e+---+\n ROOT | | 0 | xxe6\n +---+ | +---+\n xxxx | 0 | shortcut : : xxe6\n +---+ | +---+\n xxe6 : : | | | xxe6\n +---+ | +---+\n | 6 |---+ : : xxe6\n +---+ +---+\n xxe6 : : | f | xxe6\n +---+ +---+\n xxe6 | f |\n +---+\n\n4. As mentioned above, If a slot(slot 6) of the root points to a shortcut,\n it may be mistakenly transferred to a key*, leading to a read\n out-of-bounds read.\n\nTo fix this issue, one should jump to descend_to_node if the ptr is a\nshortcut, regardless of whether the node is root or not.\n\n[1] https://lore.kernel.org/linux-kernel/1cfa878e-8c7b-4570-8606-21daf5e13ce7@huaweicloud.com/\n\n[jarkko: tweaked the commit message a bit to have an appropriate closes\n tag.]"
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T20:49:30.283Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/c3ce634ad953ce48c75c39bdfd8b711dd95f346f"
},
{
"url": "https://git.kernel.org/stable/c/4efb69a0e294ef201bcdf7ce3d6202cd0a545a5d"
},
{
"url": "https://git.kernel.org/stable/c/1e4332581cd4eed75aea77af6f66cdcdda8b49b9"
},
{
"url": "https://git.kernel.org/stable/c/199c20fb7499c79557a075dc24e9a7dae7d9f1ce"
},
{
"url": "https://git.kernel.org/stable/c/bbad2d5b6c99db468d8f88b6ba6a56ed409b4881"
},
{
"url": "https://git.kernel.org/stable/c/3e79ad156bedf2da0ab909a118d2cec6c9c22b79"
},
{
"url": "https://git.kernel.org/stable/c/e0a317ad68e4ea48a0158187238c5407e4fdec8b"
},
{
"url": "https://git.kernel.org/stable/c/4a74da044ec9ec8679e6beccc4306b936b62873f"
}
],
"title": "security/keys: fix slab-out-of-bounds in key_task_permission",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2024-50301",
"datePublished": "2024-11-19T01:30:49.982Z",
"dateReserved": "2024-10-21T19:36:19.987Z",
"dateUpdated": "2026-05-12T12:00:59.478Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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