CVE-2026-74433

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-15. A secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

rxrpc: Fix UAF in rxgk_issue_challenge()

Fix rxgk_issue_challenge() to free the page containing the challenge content after invoking the tracepoint as the whdr passed to the tracepoint points into the page just freed.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
49
EG Risk 49/100CISA SSVC

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
Severity98% × 45%
Exploitation1% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.6%
EPSS %ILE
49th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 15, 2026

Last Modified

August 17, 2026

Advisory Details (3)

Auto-updated Oct 5, 2026
Patch available.
generic

rxrpc: Fix UAF in rxgk_issue_challenge() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/844b8525ce503405c462ad67f750bec648720397
generic

rxrpc: Fix UAF in rxgk_issue_challenge() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/83bb0ed050e2ad9453d8ef50e4d6e624eac6eed8
generic

rxrpc: Fix UAF in rxgk_issue_challenge() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/107a4cb0d47e735830f852d83970d5c81f8e1e08

Vendor Advisories for CVE-2026-74433(1)

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

Patch Availability(4)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-34.34) @ resolute2026-10-05ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1014.14) @ resolute2026-10-05ubuntu
ubuntulinux-tools-oracle-edge (7.0.0-1012.12~24.04.1) @ noble2026-10-05ubuntu
ubuntulinux-tools-gke-hwe-26.04 (7.0.0-1007.8) @ resolute2026-10-05ubuntu

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

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (160 versions)
  • every version up to 7.1.5-1: fixed in 7.1.5-1
—

All Vendor Advisories

(4)

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 55× in last 7d / 207× 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 359 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-74433?
CVE-2026-74433 is a critical vulnerability published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix UAF in rxgkissuechallenge() Fix rxgkissuechallenge() to free the page containing the challenge content after invoking the tracepoint as the whdr passed to the tracepoint points into the page just freed.
When was CVE-2026-74433 disclosed?
CVE-2026-74433 was first published on August 15, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74433 actively exploited?
CVE-2026-74433 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (49th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74433?
CVE-2026-74433 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-74433?
A fix for CVE-2026-74433 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-74433 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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