crypto: qat - fix VF2PF work teardown race in adf_disable_sriov()
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 cle
CVE-2026-64438
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-64438
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"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"
}
],
"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"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"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"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-64438
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41044 · Revision 1
- Added to Heist Feed
- Publisher date