CVE-2026-31532

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-04-23. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
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:

can: raw: fix ro->uniq use-after-free in raw_rcv()

raw_release() unregisters raw CAN receive filters via can_rx_unregister(), but receiver deletion is deferred with call_rcu(). This leaves a window where raw_rcv() may still be running in an RCU read-side critical section after raw_release() frees ro->uniq, leading to a use-after-free of the percpu uniq storage.

Move free_percpu(ro->uniq) out of raw_release() and into a raw-specific socket destructor. can_rx_unregister() takes an extra reference to the socket and only drops it from the RCU callback, so freeing uniq from sk_destruct ensures the percpu area is not released until the relevant callbacks have drained.

[mkl: applied manually]

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
2%
KEV
Not listed

Published

April 23, 2026

Last Modified

August 5, 2026

Advisory Details (6)

Auto-updated Apr 29, 2026
No patch confirmed yet.
generic

can: raw: fix ro->uniq use-after-free in raw_rcv() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a535a9217ca3f2fccedaafb2fddb4c48f27d36dc
generic

can: raw: fix ro->uniq use-after-free in raw_rcv() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7201a531b9a5ed892bfda5ded9194ef622de8ffa
generic

can: raw: fix ro->uniq use-after-free in raw_rcv() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5e9cfffad898bbeaafd0ea608a6d267362f050fc
generic

can: raw: fix ro->uniq use-after-free in raw_rcv() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/572f0bf536ebc14f6e7da3d21a85cf076de8358e
generic

can: raw: fix ro->uniq use-after-free in raw_rcv() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/34c1741254ff972e8375faf176678a248826fe3a
generic

can: raw: fix ro->uniq use-after-free in raw_rcv() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1a0f2de81f7fbdc538fc72d7d74609b79bc83cc0

Vendor Advisories for CVE-2026-31532(18)

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

Patch Availability(17)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatkernel-rt-0:3.10.0-1160.155.1.rt56.1307.el72026-07-17redhat
redhatkernel-0:4.18.0-372.195.1.el8_62026-06-12redhat
redhatkernel-0:6.12.0-211.22.1.el10_22026-06-11redhat
redhatkernel-0:3.10.0-1160.151.1.el72026-06-10redhat
redhatkernel-0:4.18.0-553.126.1.el8_102026-05-28redhat
redhatkernel-rt-0:4.18.0-553.126.1.rt7.467.el8_102026-05-28redhat
redhatkernel-0:5.14.0-284.172.1.el9_22026-05-26redhat
redhatkernel-0:4.18.0-305.192.1.el8_42026-05-21redhat
redhatkernel-0:5.14.0-70.180.1.el9_02026-05-20redhat
redhatkernel-0:4.18.0-477.143.1.el8_82026-05-20redhat
redhatkernel-0:5.14.0-687.10.1.el9_82026-05-20redhat
redhatkernel-rt-0:5.14.0-70.180.1.rt21.252.el9_02026-05-20redhat
redhatkernel-rt-0:5.14.0-284.172.1.rt14.457.el9_22026-05-20redhat
redhatkernel-0:6.12.0-55.72.1.el10_02026-05-11redhat
redhatkernel-0:5.14.0-427.124.1.el9_42026-05-06redhat
redhatkernel-0:5.14.0-570.112.1.el9_62026-05-06redhat
linuxKernel @ 5.10.258—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 ... 5.10.92-2 (54 versions)5.10.259-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)6.1.176-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)6.12.85-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (126 versions)6.19.14-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(8)

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 7× in last 7d / 86× 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 251 total refreshes for this CVE.

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

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

Frequently asked(5)

What is CVE-2026-31532?
CVE-2026-31532 is a high vulnerability published on April 23, 2026. In the Linux kernel, the following vulnerability has been resolved: can: raw: fix ro->uniq use-after-free in raw_rcv() rawrelease() unregisters raw CAN receive filters via canrx_unregister(), but receiver deletion is deferred with call_rcu(). This leaves a window where raw_rcv() may still be…
When was CVE-2026-31532 disclosed?
CVE-2026-31532 was first published in the National Vulnerability Database on April 23, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31532 actively exploited?
CVE-2026-31532 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 97.6% of all scored CVEs.
What is the CVSS score of CVE-2026-31532?
CVE-2026-31532 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-31532?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31532, 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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