CVE-2026-23221

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-02-18. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

bus: fsl-mc: fix use-after-free in driver_override_show()

The driver_override_show() function reads the driver_override string without holding the device_lock. However, driver_override_store() uses driver_set_override(), which modifies and frees the string while holding the device_lock.

This can result in a concurrent use-after-free if the string is freed by the store function while being read by the show function.

Fix this by holding the device_lock around the read operation.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

February 18, 2026

Last Modified

June 17, 2026

Advisory Details (7)

Auto-updated Aug 2, 2026
No patch confirmed yet.
generic

bus: fsl-mc: fix use-after-free in driver_override_show() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dd8ba8c0c3f3916d4ee1e3a09da9cd5caff5d227
generic

bus: fsl-mc: fix use-after-free in driver_override_show() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c71dfb7833db7af652ee8f65011f14c97c47405d
generic

bus: fsl-mc: fix use-after-free in driver_override_show() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c424e72cfa67e7e1477035058a8a659f2c0ea637
generic

bus: fsl-mc: fix use-after-free in driver_override_show() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b1983840287303e0dfb401b1b6cecc5ea7471e90
generic

bus: fsl-mc: fix use-after-free in driver_override_show() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a2ae33e1c6361e960a4d00f7cf75d880b54f9528
generic

bus: fsl-mc: fix use-after-free in driver_override_show() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1d6bd6183e723a7b256ff34bbb5b498b5f4f2ec0
generic

bus: fsl-mc: fix use-after-free in driver_override_show() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/148891e95014b5dc5878acefa57f1940c281c431

Patch Availability(18)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-07-27ubuntu
ubuntulinux-virtual-6.8 (6.8.0-134.134) @ noble2026-07-27ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1058.61.1) @ noble2026-07-27ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-134.134.1) @ noble2026-07-27ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1029.30) @ noble2026-07-27ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1032.33) @ noble2026-07-27ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2049.50) @ noble2026-07-27ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1060.64) @ noble2026-07-27ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-134.134+fips1) @ noble2026-07-27ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-07-27ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-07-27ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-07-27ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-07-27ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-07-27ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-07-27ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-07-27ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-07-27ubuntu
linuxKernel @ 5.15.201—osv

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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)——
linux-6.16.1.106-3~deb11u1 ... 6.1.162-1~deb11u1 (15 versions)6.1.164-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (47 versions)6.1.164-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.74-2~bpo12+1 (15 versions)6.12.74-2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.18~rc7-1~exp1 (101 versions)6.18.12-1—

Weakness Classification(1)

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

All Vendor Advisories

(23)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 5× in last 7d / 23× 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.

  1. 2026-09-20 20:15 UTCEPSS rescore
  2. 2026-09-19 16:00 UTCOSV refresh
  3. 2026-09-18 19:27 UTCEPSS rescore
  4. 2026-09-16 14:07 UTCEPSS rescore
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-13 16:47 UTCEPSS rescore
  7. 2026-09-12 15:01 UTCEPSS rescore
  8. 2026-09-11 14:52 UTCEPSS rescore
  9. 2026-09-10 09:34 UTCEPSS rescore
  10. 2026-09-08 22:00 UTCEPSS rescore
  11. 2026-09-07 16:01 UTCEPSS rescore
  12. 2026-09-06 13:47 UTCEPSS rescore
  13. 2026-09-06 13:47 UTCEPSS rescore
  14. 2026-09-04 05:06 UTCEPSS rescore
  15. 2026-09-02 14:11 UTCEPSS rescore
  16. 2026-09-01 13:53 UTCEPSS rescore
  17. 2026-09-01 04:39 UTCEPSS rescore
  18. 2026-08-31 19:04 UTCOSV refresh
  19. 2026-08-30 01:22 UTCEPSS rescore
  20. 2026-08-28 21:41 UTCEPSS rescore
  21. 2026-08-27 14:25 UTCEPSS rescore
  22. 2026-08-26 14:46 UTCEPSS rescore
  23. 2026-08-25 13:48 UTCEPSS rescore
  24. 2026-08-21 23:49 UTCEPSS rescore
  25. 2026-08-20 22:55 UTCEPSS rescore
Show 47 more
  1. 2026-08-19 17:03 UTCEPSS rescore
  2. 2026-08-17 13:47 UTCEPSS rescore
  3. 2026-08-16 14:56 UTCEPSS rescore
  4. 2026-08-16 02:14 UTCEPSS rescore
  5. 2026-08-15 01:30 UTCEPSS rescore
  6. 2026-08-14 22:47 UTCVendor advisory
  7. 2026-08-14 22:47 UTCGHSA enrichment
  8. 2026-08-14 09:48 UTCEG score recompute
  9. 2026-08-14 09:48 UTCVendor advisory
  10. 2026-08-14 09:48 UTCGHSA enrichment
  11. 2026-08-13 22:00 UTCEPSS rescore
  12. 2026-08-13 02:06 UTCEG score recompute
  13. 2026-08-13 02:06 UTCVendor advisory
  14. 2026-08-13 02:06 UTCGHSA enrichment
  15. 2026-08-12 13:50 UTCEPSS rescore
  16. 2026-08-11 13:42 UTCEPSS rescore
  17. 2026-08-11 07:28 UTCEG score recompute
  18. 2026-08-11 07:28 UTCVendor advisory
  19. 2026-08-11 07:28 UTCGHSA enrichment
  20. 2026-08-11 00:00 UTCEPSS rescore
  21. 2026-08-10 03:06 UTCVendor advisory
  22. 2026-08-10 03:06 UTCGHSA enrichment
  23. 2026-08-09 14:07 UTCEG score recompute
  24. 2026-08-09 14:07 UTCVendor advisory
  25. 2026-08-09 14:07 UTCGHSA enrichment
  26. 2026-08-09 13:46 UTCEPSS rescore
  27. 2026-08-08 16:37 UTCEPSS rescore
  28. 2026-08-08 11:49 UTCVendor advisory
  29. 2026-08-08 11:49 UTCGHSA enrichment
  30. 2026-08-07 21:41 UTCEG score recompute
  31. 2026-08-07 21:41 UTCVendor advisory
  32. 2026-08-07 21:41 UTCGHSA enrichment
  33. 2026-08-06 13:46 UTCEPSS rescore
  34. 2026-08-06 03:35 UTCEG score recompute
  35. 2026-08-06 03:35 UTCVendor advisory
  36. 2026-08-06 03:35 UTCGHSA enrichment
  37. 2026-08-05 19:17 UTCEPSS rescore
  38. 2026-08-04 10:38 UTCEPSS rescore
  39. 2026-08-03 10:35 UTCEPSS rescore
  40. 2026-08-02 20:21 UTCEG score recompute
  41. 2026-08-02 20:21 UTCVendor advisory
  42. 2026-08-02 20:21 UTCGHSA enrichment
  43. 2026-08-02 02:26 UTCEPSS rescore
  44. 2026-07-27 14:13 UTCEPSS rescore
  45. 2026-07-27 13:29 UTCEG score recompute
  46. 2026-07-27 13:29 UTCVendor advisory
  47. 2026-07-27 13:28 UTCGHSA enrichment

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-23221?
CVE-2026-23221 is a high vulnerability published on February 18, 2026. In the Linux kernel, the following vulnerability has been resolved: bus: fsl-mc: fix use-after-free in driveroverrideshow() The driveroverrideshow() function reads the driver_override string without holding the devicelock. However, driveroverride_store() uses driversetoverride(), which modifies and…
When was CVE-2026-23221 disclosed?
CVE-2026-23221 was first published in the National Vulnerability Database on February 18, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23221 actively exploited?
CVE-2026-23221 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 97.3% of all scored CVEs.
What is the CVSS score of CVE-2026-23221?
CVE-2026-23221 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-23221?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23221, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-23221

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