CVE-2026-68257

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-10. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
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

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

drm/amdkfd: fix 32-bit overflow in CWSR total size calculation

total_cwsr_size was computed in 32-bit before being used as a BO/SVM allocation size. With large ctx_save_restore_area_size and debug_memory_size multiplied by the XCC count, the product can wrap, yielding an undersized CWSR save area that firmware later overruns.

Promote total_cwsr_size to u64 and use check_add_overflow()/ check_mul_overflow() in both kfd_queue_acquire_buffers() and kfd_queue_release_buffers().

(cherry picked from commit 319f7e13423ae3f486b9aea82f9ad2d6af0ee608)

CVSS v3
7.8
EG Score
7.8(high)
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
4%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 18, 2026

Advisory Details (4)

Auto-updated Aug 14, 2026
No patch confirmed yet.
generic

drm/amdkfd: fix 32-bit overflow in CWSR total size calculation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b88ffe6593607364a8c06a48c6f29e55437cdf8e
generic

drm/amdkfd: fix 32-bit overflow in CWSR total size calculation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/abce3276c57e36c955627307469b9f009057a467
generic

drm/amdkfd: fix 32-bit overflow in CWSR total size calculation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/865532d54eb57b660b1cb1b0e1755776ce21b849
generic

drm/amdkfd: fix 32-bit overflow in CWSR total size calculation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2b0386d4293920e690c0e017708f999b93cc729b

Vendor Advisories for CVE-2026-68257(2)

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

Data Freshness Timeline

(refreshed 34× in last 7d / 46× 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. 2026-08-21 00:17 UTCEG score recompute
  2. 2026-08-21 00:17 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 11:21 UTCGHSA enrichment
  5. 2026-08-19 22:24 UTCEG score recompute
  6. 2026-08-19 22:24 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 09:22 UTCGHSA enrichment
  9. 2026-08-18 20:25 UTCEG score recompute
  10. 2026-08-18 20:25 UTCGHSA enrichment
  11. 2026-08-18 13:49 UTCEPSS rescore
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 07:25 UTCEG score recompute
  14. 2026-08-18 07:25 UTCGHSA enrichment
  15. 2026-08-18 07:03 UTCEG score recompute
  16. 2026-08-18 07:03 UTCGHSA enrichment
  17. 2026-08-17 19:20 UTCEG score recompute
  18. 2026-08-17 19:20 UTCGHSA enrichment
  19. 2026-08-17 13:47 UTCEPSS rescore
  20. 2026-08-17 05:37 UTCEG score recompute
  21. 2026-08-17 05:37 UTCGHSA enrichment
  22. 2026-08-17 05:08 UTCEG score recompute
  23. 2026-08-17 05:08 UTCGHSA enrichment
  24. 2026-08-16 16:30 UTCEG score recompute
  25. 2026-08-16 16:30 UTCGHSA enrichment
Show 21 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 03:34 UTCEG score recompute
  3. 2026-08-16 03:34 UTCGHSA enrichment
  4. 2026-08-15 14:37 UTCGHSA enrichment
  5. 2026-08-15 01:39 UTCEG score recompute
  6. 2026-08-15 01:39 UTCGHSA enrichment
  7. 2026-08-15 01:30 UTCEPSS rescore
  8. 2026-08-14 12:43 UTCEG score recompute
  9. 2026-08-14 12:43 UTCGHSA enrichment
  10. 2026-08-13 23:46 UTCEG score recompute
  11. 2026-08-13 23:46 UTCGHSA enrichment
  12. 2026-08-13 22:44 UTCEG score recompute▲ 7.80
  13. 2026-08-13 22:44 UTCGHSA enrichment
  14. 2026-08-13 22:44 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  15. 2026-08-13 22:00 UTCEPSS rescore
  16. 2026-08-13 14:42 UTCEG score recompute
  17. 2026-08-13 14:42 UTCGHSA enrichment
  18. 2026-08-12 13:51 UTCEPSS rescore
  19. 2026-08-10 13:24 UTCNVD update
  20. 2026-08-10 12:19 UTCEG score recompute
  21. 2026-08-10 12:17 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-68257?
CVE-2026-68257 is a high vulnerability published on August 10, 2026. In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix 32-bit overflow in CWSR total size calculation totalcwsrsize was computed in 32-bit before being used as a BO/SVM allocation size. With large ctxsaverestoreareasize and debugmemorysize multiplied by the XCC count,…
When was CVE-2026-68257 disclosed?
CVE-2026-68257 was first published in the National Vulnerability Database on August 10, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-68257 actively exploited?
CVE-2026-68257 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 96.3% of all scored CVEs.
What is the CVSS score of CVE-2026-68257?
CVE-2026-68257 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-68257?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-68257, 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

Explore the affected products and dependency analysis for CVE-2026-68257

Explore →

Is Your Infrastructure Affected by CVE-2026-68257?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs