CVE-2026-64438 (GCVE-0-2026-64438)
Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-07-25 08:51
VLAI
EPSS
VEX
Title
crypto: qat - fix VF2PF work teardown race in adf_disable_sriov()
Summary
In the Linux kernel, the following vulnerability has been resolved:
crypto: qat - fix VF2PF work teardown race in adf_disable_sriov()
The VF2PF interrupt handler queues PF-side response work that stores a
raw pointer to per-VF state (struct adf_accel_vf_info). Currently,
adf_disable_sriov() destroys per-VF mutexes and frees vf_info without
stopping new VF2PF work or waiting for in-flight workers to complete. A
concurrently scheduled or already queued worker can then dereference
freed memory.
This manifests as a use-after-free when KASAN is enabled:
BUG: KASAN: null-ptr-deref in mutex_lock+0x76/0xe0
Write of size 8 at addr 0000000000000260 by task kworker/24:2/...
Workqueue: qat_pf2vf_resp_wq adf_iov_send_resp [intel_qat]
Call Trace:
kasan_report+0x119/0x140
mutex_lock+0x76/0xe0
adf_gen4_pfvf_send+0xd4/0x1f0 [intel_qat]
adf_recv_and_handle_vf2pf_msg+0x290/0x360 [intel_qat]
adf_iov_send_resp+0x8c/0xe0 [intel_qat]
process_one_work+0x6ac/0xfd0
worker_thread+0x4dd/0xd30
kthread+0x326/0x410
ret_from_fork+0x33b/0x670
Add a PF-local flag, vf2pf_disabled, that gates work queueing, worker
processing, and interrupt re-enabling during teardown. Set this flag
atomically with the hardware interrupt mask inside
adf_disable_all_vf2pf_interrupts(). After masking, synchronize the AE
cluster MSI-X interrupt and flush the PF response workqueue before
tearing down per-VF locks and state so all in-flight work completes
before vf_info is destroyed.
Introduce adf_enable_all_vf2pf_interrupts() to clear the flag and
unmask all VF2PF interrupts under the same lock when SR-IOV is
re-enabled. This ensures the software flag and hardware state transition
atomically on both the enable and disable paths.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < 218c2836b3987f3fa1d9eac505462cded0821e4c
(git)
Affected: ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < 446b4d77599cf1a168573f7fb32a4a6aa4f09219 (git) Affected: ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < 5d916c1eae1933511a69bffe243b4ee5d7da399c (git) Affected: ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < f344a369d0380d54c8d6c8d24734a78dd5a89817 (git) Affected: ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < 51144032248cc4ea22917370565650670b8b4e9b (git) Affected: ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < 49cd5ac6de8de39a14ead609bb552d372d5602cd (git) Affected: ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < 6e92b28cd74fa433658efeadf21b9d4b01023d7d (git) Affected: ed8ccaef52fa03fb03cff45b380f72c9f869f273 , < 277281c10c63791067d24d421f7c43a15faa9096 (git) |
|
| Linux | Linux |
Affected:
4.3
Unaffected: 0 , < 4.3 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
{
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"programFiles": [
"drivers/crypto/intel/qat/qat_common/adf_accel_devices.h",
"drivers/crypto/intel/qat/qat_common/adf_common_drv.h",
"drivers/crypto/intel/qat/qat_common/adf_isr.c",
"drivers/crypto/intel/qat/qat_common/adf_sriov.c"
],
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"drivers/crypto/intel/qat/qat_common/adf_common_drv.h",
"drivers/crypto/intel/qat/qat_common/adf_isr.c",
"drivers/crypto/intel/qat/qat_common/adf_sriov.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"version": "4.3"
},
{
"lessThan": "4.3",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
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{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.12.97",
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},
{
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"status": "unaffected",
"version": "6.18.40",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.261",
"versionStartIncluding": "4.3",
"vulnerable": true
},
{
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"versionEndExcluding": "5.15.212",
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},
{
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"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.145",
"versionStartIncluding": "4.3",
"vulnerable": true
},
{
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"versionEndExcluding": "6.12.97",
"versionStartIncluding": "4.3",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.40",
"versionStartIncluding": "4.3",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.4",
"versionStartIncluding": "4.3",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2-rc1",
"versionStartIncluding": "4.3",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: qat - fix VF2PF work teardown race in adf_disable_sriov()\n\nThe VF2PF interrupt handler queues PF-side response work that stores a\nraw pointer to per-VF state (struct adf_accel_vf_info). Currently,\nadf_disable_sriov() destroys per-VF mutexes and frees vf_info without\nstopping new VF2PF work or waiting for in-flight workers to complete. A\nconcurrently scheduled or already queued worker can then dereference\nfreed memory.\n\nThis manifests as a use-after-free when KASAN is enabled:\n\n BUG: KASAN: null-ptr-deref in mutex_lock+0x76/0xe0\n Write of size 8 at addr 0000000000000260 by task kworker/24:2/...\n Workqueue: qat_pf2vf_resp_wq adf_iov_send_resp [intel_qat]\n Call Trace:\n kasan_report+0x119/0x140\n mutex_lock+0x76/0xe0\n adf_gen4_pfvf_send+0xd4/0x1f0 [intel_qat]\n adf_recv_and_handle_vf2pf_msg+0x290/0x360 [intel_qat]\n adf_iov_send_resp+0x8c/0xe0 [intel_qat]\n process_one_work+0x6ac/0xfd0\n worker_thread+0x4dd/0xd30\n kthread+0x326/0x410\n ret_from_fork+0x33b/0x670\n\nAdd a PF-local flag, vf2pf_disabled, that gates work queueing, worker\nprocessing, and interrupt re-enabling during teardown. Set this flag\natomically with the hardware interrupt mask inside\nadf_disable_all_vf2pf_interrupts(). After masking, synchronize the AE\ncluster MSI-X interrupt and flush the PF response workqueue before\ntearing down per-VF locks and state so all in-flight work completes\nbefore vf_info is destroyed.\n\nIntroduce adf_enable_all_vf2pf_interrupts() to clear the flag and\nunmask all VF2PF interrupts under the same lock when SR-IOV is\nre-enabled. This ensures the software flag and hardware state transition\natomically on both the enable and disable paths."
}
],
"providerMetadata": {
"dateUpdated": "2026-07-25T08:51:11.740Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/218c2836b3987f3fa1d9eac505462cded0821e4c"
},
{
"url": "https://git.kernel.org/stable/c/446b4d77599cf1a168573f7fb32a4a6aa4f09219"
},
{
"url": "https://git.kernel.org/stable/c/5d916c1eae1933511a69bffe243b4ee5d7da399c"
},
{
"url": "https://git.kernel.org/stable/c/f344a369d0380d54c8d6c8d24734a78dd5a89817"
},
{
"url": "https://git.kernel.org/stable/c/51144032248cc4ea22917370565650670b8b4e9b"
},
{
"url": "https://git.kernel.org/stable/c/49cd5ac6de8de39a14ead609bb552d372d5602cd"
},
{
"url": "https://git.kernel.org/stable/c/6e92b28cd74fa433658efeadf21b9d4b01023d7d"
},
{
"url": "https://git.kernel.org/stable/c/277281c10c63791067d24d421f7c43a15faa9096"
}
],
"title": "crypto: qat - fix VF2PF work teardown race in adf_disable_sriov()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64438",
"datePublished": "2026-07-25T08:51:11.740Z",
"dateReserved": "2026-07-19T15:36:31.788Z",
"dateUpdated": "2026-07-25T08:51:11.740Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-64438",
"date": "2026-07-26",
"epss": "0.00184",
"percentile": "0.08315"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-64438\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-25T10:17:28.303\",\"lastModified\":\"2026-07-25T10:17:28.303\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncrypto: qat - fix VF2PF work teardown race in adf_disable_sriov()\\n\\nThe VF2PF interrupt handler queues PF-side response work that stores a\\nraw pointer to per-VF state (struct adf_accel_vf_info). Currently,\\nadf_disable_sriov() destroys per-VF mutexes and frees vf_info without\\nstopping new VF2PF work or waiting for in-flight workers to complete. A\\nconcurrently scheduled or already queued worker can then dereference\\nfreed memory.\\n\\nThis manifests as a use-after-free when KASAN is enabled:\\n\\n BUG: KASAN: null-ptr-deref in mutex_lock+0x76/0xe0\\n Write of size 8 at addr 0000000000000260 by task kworker/24:2/...\\n Workqueue: qat_pf2vf_resp_wq adf_iov_send_resp [intel_qat]\\n Call Trace:\\n kasan_report+0x119/0x140\\n mutex_lock+0x76/0xe0\\n adf_gen4_pfvf_send+0xd4/0x1f0 [intel_qat]\\n adf_recv_and_handle_vf2pf_msg+0x290/0x360 [intel_qat]\\n adf_iov_send_resp+0x8c/0xe0 [intel_qat]\\n process_one_work+0x6ac/0xfd0\\n worker_thread+0x4dd/0xd30\\n kthread+0x326/0x410\\n ret_from_fork+0x33b/0x670\\n\\nAdd a PF-local flag, vf2pf_disabled, that gates work queueing, worker\\nprocessing, and interrupt re-enabling during teardown. Set this flag\\natomically with the hardware interrupt mask inside\\nadf_disable_all_vf2pf_interrupts(). After masking, synchronize the AE\\ncluster MSI-X interrupt and flush the PF response workqueue before\\ntearing down per-VF locks and state so all in-flight work completes\\nbefore vf_info is destroyed.\\n\\nIntroduce adf_enable_all_vf2pf_interrupts() to clear the flag and\\nunmask all VF2PF interrupts under the same lock when SR-IOV is\\nre-enabled. This ensures the software flag and hardware state transition\\natomically on both the enable and disable paths.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/crypto/intel/qat/qat_common/adf_accel_devices.h\",\"drivers/crypto/intel/qat/qat_common/adf_common_drv.h\",\"drivers/crypto/intel/qat/qat_common/adf_isr.c\",\"drivers/crypto/intel/qat/qat_common/adf_sriov.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"ed8ccaef52fa03fb03cff45b380f72c9f869f273\",\"lessThan\":\"218c2836b3987f3fa1d9eac505462cded0821e4c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed8ccaef52fa03fb03cff45b380f72c9f869f273\",\"lessThan\":\"446b4d77599cf1a168573f7fb32a4a6aa4f09219\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed8ccaef52fa03fb03cff45b380f72c9f869f273\",\"lessThan\":\"5d916c1eae1933511a69bffe243b4ee5d7da399c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed8ccaef52fa03fb03cff45b380f72c9f869f273\",\"lessThan\":\"f344a369d0380d54c8d6c8d24734a78dd5a89817\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed8ccaef52fa03fb03cff45b380f72c9f869f273\",\"lessThan\":\"51144032248cc4ea22917370565650670b8b4e9b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed8ccaef52fa03fb03cff45b380f72c9f869f273\",\"lessThan\":\"49cd5ac6de8de39a14ead609bb552d372d5602cd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed8ccaef52fa03fb03cff45b380f72c9f869f273\",\"lessThan\":\"6e92b28cd74fa433658efeadf21b9d4b01023d7d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed8ccaef52fa03fb03cff45b380f72c9f869f273\",\"lessThan\":\"277281c10c63791067d24d421f7c43a15faa9096\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/crypto/intel/qat/qat_common/adf_accel_devices.h\",\"drivers/crypto/intel/qat/qat_common/adf_common_drv.h\",\"drivers/crypto/intel/qat/qat_common/adf_isr.c\",\"drivers/crypto/intel/qat/qat_common/adf_sriov.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.3\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.3\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/218c2836b3987f3fa1d9eac505462cded0821e4c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/277281c10c63791067d24d421f7c43a15faa9096\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/446b4d77599cf1a168573f7fb32a4a6aa4f09219\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/49cd5ac6de8de39a14ead609bb552d372d5602cd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/51144032248cc4ea22917370565650670b8b4e9b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5d916c1eae1933511a69bffe243b4ee5d7da399c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6e92b28cd74fa433658efeadf21b9d4b01023d7d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f344a369d0380d54c8d6c8d24734a78dd5a89817\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
"suse_vex": {
"aggregate_severity": "not set",
"current_release_date": "2026-07-25T15:59:20Z",
"cve": "CVE-2026-64438",
"id": "CVE-2026-64438",
"initial_release_date": "2026-07-25T15:59:20Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-64438",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64438.json",
"version": "2"
}
}
}
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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.
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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.
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