CVE-2026-64438

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-25. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

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.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

July 25, 2026

Last Modified

September 3, 2026

Advisory Details (8)

Auto-updated Jul 27, 2026
No patch confirmed yet.
generic

crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f344a369d0380d54c8d6c8d24734a78dd5a89817
generic

crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6e92b28cd74fa433658efeadf21b9d4b01023d7d
generic

crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5d916c1eae1933511a69bffe243b4ee5d7da399c
generic

crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/51144032248cc4ea22917370565650670b8b4e9b
generic

crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/49cd5ac6de8de39a14ead609bb552d372d5602cd
generic

crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/446b4d77599cf1a168573f7fb32a4a6aa4f09219
generic

crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/277281c10c63791067d24d421f7c43a15faa9096
generic

crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/218c2836b3987f3fa1d9eac505462cded0821e4c

Vendor Advisories for CVE-2026-64438(6)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(10)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1035.38) @ noble2026-09-18ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1019.19) @ resolute2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1018.18~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1013.13) @ resolute2026-09-18ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-31.31~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-18ubuntu
redhatkernel-0:5.14.0-570.141.1.el9_62026-09-16redhat
redhatkernel-0:5.14.0-427.150.1.el9_42026-09-16redhat
redhatkernel-0:5.14.0-687.44.1.el9_82026-09-04redhat
redhatkernel-0:6.12.0-211.50.1.el10_22026-09-01redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (55 versions)5.10.262-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.177-1~deb11u1 (22 versions)6.1.180-1~deb11u1—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (55 versions)6.1.180-1—
linux-6.12—6.12.100-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.96-1 (31 versions)6.12.100-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (158 versions)7.1.4-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(6)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 28× in last 7d / 108× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 220 total refreshes for this CVE.

  1. 2026-09-18 19:37 UTCEG score recompute
  2. 2026-09-18 19:37 UTCVendor advisory
  3. 2026-09-18 19:37 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 02:43 UTCEG score recompute
  6. 2026-09-18 02:43 UTCVendor advisory
  7. 2026-09-18 02:43 UTCGHSA enrichment
  8. 2026-09-17 01:51 UTCEG score recompute
  9. 2026-09-17 01:51 UTCVendor advisory
  10. 2026-09-17 01:51 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 06:25 UTCEG score recompute
  13. 2026-09-16 06:25 UTCVendor advisory
  14. 2026-09-16 06:25 UTCGHSA enrichment
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-15 09:21 UTCEG score recompute
  17. 2026-09-15 09:21 UTCVendor advisory
  18. 2026-09-15 09:21 UTCGHSA enrichment
  19. 2026-09-14 05:20 UTCVendor advisory
  20. 2026-09-14 05:20 UTCGHSA enrichment
  21. 2026-09-13 17:16 UTCEG score recompute
  22. 2026-09-13 17:16 UTCVendor advisory
  23. 2026-09-13 17:16 UTCGHSA enrichment
  24. 2026-09-13 05:07 UTCVendor advisory
  25. 2026-09-13 05:07 UTCGHSA enrichment
Show 75 more
  1. 2026-09-12 17:03 UTCEG score recompute
  2. 2026-09-12 17:03 UTCVendor advisory
  3. 2026-09-12 17:03 UTCGHSA enrichment
  4. 2026-09-12 04:57 UTCVendor advisory
  5. 2026-09-12 04:57 UTCGHSA enrichment
  6. 2026-09-11 16:20 UTCEG score recompute
  7. 2026-09-11 16:20 UTCVendor advisory
  8. 2026-09-11 16:20 UTCGHSA enrichment
  9. 2026-09-11 14:53 UTCEPSS rescore
  10. 2026-09-11 09:37 UTCEPSS rescore
  11. 2026-09-10 22:34 UTCVendor advisory
  12. 2026-09-10 22:34 UTCGHSA enrichment
  13. 2026-09-10 10:29 UTCEG score recompute
  14. 2026-09-10 10:29 UTCVendor advisory
  15. 2026-09-10 10:29 UTCGHSA enrichment
  16. 2026-09-09 08:32 UTCEG score recompute
  17. 2026-09-09 08:32 UTCVendor advisory
  18. 2026-09-09 08:31 UTCGHSA enrichment
  19. 2026-09-08 22:01 UTCEPSS rescore
  20. 2026-09-07 21:12 UTCEG score recompute
  21. 2026-09-07 21:12 UTCVendor advisory
  22. 2026-09-07 21:12 UTCGHSA enrichment
  23. 2026-09-07 16:01 UTCEPSS rescore
  24. 2026-09-06 13:47 UTCEPSS rescore
  25. 2026-09-06 07:56 UTCVendor advisory
  26. 2026-09-06 07:56 UTCGHSA enrichment
  27. 2026-09-05 19:19 UTCEG score recompute
  28. 2026-09-05 19:19 UTCVendor advisory
  29. 2026-09-05 19:19 UTCGHSA enrichment
  30. 2026-09-05 15:31 UTCEPSS rescore
  31. 2026-09-05 05:58 UTCEG score recompute
  32. 2026-09-05 05:58 UTCVendor advisory
  33. 2026-09-05 05:58 UTCGHSA enrichment
  34. 2026-09-04 12:38 UTCEG score recompute
  35. 2026-09-04 12:38 UTCVendor advisory
  36. 2026-09-04 12:38 UTCGHSA enrichment
  37. 2026-09-04 05:07 UTCEPSS rescore
  38. 2026-09-03 18:06 UTCEG score recompute
  39. 2026-09-03 18:06 UTCVendor advisory
  40. 2026-09-03 18:06 UTCGHSA enrichment
  41. 2026-09-02 14:12 UTCEPSS rescore
  42. 2026-09-01 23:09 UTCEG score recompute
  43. 2026-09-01 23:09 UTCGHSA enrichment
  44. 2026-09-01 13:54 UTCEPSS rescore
  45. 2026-09-01 04:40 UTCEPSS rescore
  46. 2026-08-31 00:15 UTCEG score recompute
  47. 2026-08-31 00:15 UTCGHSA enrichment
  48. 2026-08-30 19:17 UTCEPSS rescore
  49. 2026-08-30 12:11 UTCEG score recompute
  50. 2026-08-30 12:11 UTCGHSA enrichment
  51. 2026-08-30 01:22 UTCEPSS rescore
  52. 2026-08-30 00:03 UTCEG score recompute
  53. 2026-08-30 00:03 UTCGHSA enrichment
  54. 2026-08-28 21:42 UTCEPSS rescore
  55. 2026-08-27 23:14 UTCEG score recompute
  56. 2026-08-27 23:14 UTCGHSA enrichment
  57. 2026-08-27 11:10 UTCGHSA enrichment
  58. 2026-08-26 22:58 UTCEG score recompute
  59. 2026-08-26 22:58 UTCGHSA enrichment
  60. 2026-08-26 14:47 UTCEPSS rescore
  61. 2026-08-26 10:54 UTCGHSA enrichment
  62. 2026-08-25 22:46 UTCEG score recompute
  63. 2026-08-25 22:46 UTCGHSA enrichment
  64. 2026-08-25 13:49 UTCEPSS rescore
  65. 2026-08-25 10:41 UTCGHSA enrichment
  66. 2026-08-24 22:37 UTCEG score recompute
  67. 2026-08-24 22:37 UTCGHSA enrichment
  68. 2026-08-24 10:33 UTCEG score recompute
  69. 2026-08-24 10:32 UTCGHSA enrichment
  70. 2026-08-23 22:28 UTCGHSA enrichment
  71. 2026-08-23 10:24 UTCEG score recompute
  72. 2026-08-23 10:24 UTCGHSA enrichment
  73. 2026-08-23 00:19 UTCEPSS rescore
  74. 2026-08-22 22:11 UTCGHSA enrichment
  75. 2026-08-22 10:06 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-64438?
CVE-2026-64438 is a high vulnerability published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: crypto: qat - fix VF2PF work teardown race in adfdisablesriov() The VF2PF interrupt handler queues PF-side response work that stores a raw pointer to per-VF state (struct adfaccelvf_info). Currently, adfdisablesriov() destroys…
When was CVE-2026-64438 disclosed?
CVE-2026-64438 was first published in the National Vulnerability Database on July 25, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64438 actively exploited?
CVE-2026-64438 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 96.7% of all scored CVEs.
What is the CVSS score of CVE-2026-64438?
CVE-2026-64438 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-64438?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64438, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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