{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64438", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.788Z", "datePublished": "2026-07-25T08:51:11.740Z", "dateUpdated": "2026-07-25T08:51:11.740Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T08:51:11.740Z"}, "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": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.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"], "versions": [{"version": "ed8ccaef52fa03fb03cff45b380f72c9f869f273", "lessThan": "218c2836b3987f3fa1d9eac505462cded0821e4c", "status": "affected", "versionType": "git"}, {"version": "ed8ccaef52fa03fb03cff45b380f72c9f869f273", "lessThan": "446b4d77599cf1a168573f7fb32a4a6aa4f09219", "status": "affected", "versionType": "git"}, {"version": "ed8ccaef52fa03fb03cff45b380f72c9f869f273", "lessThan": "5d916c1eae1933511a69bffe243b4ee5d7da399c", "status": "affected", "versionType": "git"}, {"version": "ed8ccaef52fa03fb03cff45b380f72c9f869f273", "lessThan": "f344a369d0380d54c8d6c8d24734a78dd5a89817", "status": "affected", "versionType": "git"}, {"version": "ed8ccaef52fa03fb03cff45b380f72c9f869f273", "lessThan": "51144032248cc4ea22917370565650670b8b4e9b", "status": "affected", "versionType": "git"}, {"version": "ed8ccaef52fa03fb03cff45b380f72c9f869f273", "lessThan": "49cd5ac6de8de39a14ead609bb552d372d5602cd", "status": "affected", "versionType": "git"}, {"version": "ed8ccaef52fa03fb03cff45b380f72c9f869f273", "lessThan": "6e92b28cd74fa433658efeadf21b9d4b01023d7d", "status": "affected", "versionType": "git"}, {"version": "ed8ccaef52fa03fb03cff45b380f72c9f869f273", "lessThan": "277281c10c63791067d24d421f7c43a15faa9096", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.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"], "versions": [{"version": "4.3", "status": "affected"}, {"version": "0", "lessThan": "4.3", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "7.2-rc1"}]}]}], "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"}}}}

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