CVE-2026-68305

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/xe/vf: Add drm_dev guards when detaching CCS read/write buffers

CCS read/write buffers are freed during BO destruction. In some cases, BOs may be destroyed after the device is unbound but while the DRM structure remains valid, leading to NULL pointer dereferences when accessing device resources.

BUG: kernel NULL pointer dereference, address: 0000000000000000 PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP NOPTI CPU: 0 UID: 0 PID: 9376 Comm: xe_pat Not tainted 7.2.0-rc2+ #1 PREEMPT(lazy) RIP: 0010:xe_sriov_vf_ccs_rw_update_bb_addr+0x4d/0xa0 [xe] RSP: 0018:ffffcf304110b9c8 EFLAGS: 00010246 RAX: ffff8a85c38a0a00 RBX: 00000000810ef000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8a85c39c1888 RBP: ffffcf304110b9e8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8a85c39c1888 R13: 0000000000000000 R14: ffff8a85c39b4f28 R15: ffff8a85c3885000 FS: 0000000000000000(0000) GS:ffff8a878b809000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000010314a002 CR4: 0000000000772ef0 PKRU: 55555554 Call Trace: xe_migrate_ccs_rw_copy_clear+0x98/0x120 [xe] xe_sriov_vf_ccs_detach_bo+0x2c/0x60 [xe] xe_ttm_bo_delete_mem_notify+0xc8/0xe0 [xe] ttm_bo_cleanup_memtype_use+0x26/0x80 [ttm] ttm_bo_release+0x29e/0x2d0 [ttm] ttm_bo_fini+0x39/0x70 [ttm] xe_gem_object_free+0x1f/0x30 [xe] drm_gem_object_free+0x1d/0x40 ttm_bo_vm_close+0x5f/0x90 [ttm] remove_vma+0x2c/0x70 tear_down_vmas+0x63/0xf0 exit_mmap+0x20d/0x3f0 __mmput+0x45/0x170 mmput+0x31/0x40 do_exit+0x2ba/0xac0 do_group_exit+0x2d/0xb0 __x64_sys_exit_group+0x18/0x20 x64_sys_call+0x14a0/0x2390 do_syscall_64+0xdd/0x640 ? count_memcg_events+0xea/0x240 ? handle_mm_fault+0x1ec/0x2f0

(cherry picked from commit 1ae415a6eefe5004954a1d352b1718faca8844ef)

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
3%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 17, 2026

Advisory Details (2)

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

drm/xe/vf: Add drm_dev guards when detaching CCS read/write buffers - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/523ed2831ee55b2a1edabdea96781651f9df9685
generic

drm/xe/vf: Add drm_dev guards when detaching CCS read/write buffers - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4c92afb4c143526d340545ca581e88e6952ea511

Vendor Advisories for CVE-2026-68305(1)

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 33× in last 7d / 45× 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 00:25 UTCEG score recompute
  2. 2026-08-21 00:25 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 13:09 UTCGHSA enrichment
  5. 2026-08-20 01:32 UTCEG score recompute
  6. 2026-08-20 01:32 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 14:14 UTCGHSA enrichment
  9. 2026-08-19 02:58 UTCGHSA enrichment
  10. 2026-08-18 15:37 UTCEG score recompute
  11. 2026-08-18 15:37 UTCGHSA enrichment
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 13:49 UTCEPSS rescore
  14. 2026-08-18 04:13 UTCGHSA enrichment
  15. 2026-08-17 16:54 UTCEG score recompute
  16. 2026-08-17 16:54 UTCGHSA enrichment
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-17 05:37 UTCEG score recompute
  19. 2026-08-17 05:37 UTCGHSA enrichment
  20. 2026-08-17 05:06 UTCEG score recompute
  21. 2026-08-17 05:06 UTCGHSA enrichment
  22. 2026-08-16 19:26 UTCEG score recompute
  23. 2026-08-16 19:26 UTCGHSA enrichment
  24. 2026-08-16 14:56 UTCEPSS rescore
  25. 2026-08-16 08:09 UTCEG score recompute
Show 20 more
  1. 2026-08-16 08:09 UTCGHSA enrichment
  2. 2026-08-15 20:53 UTCGHSA enrichment
  3. 2026-08-15 09:36 UTCEG score recompute
  4. 2026-08-15 09:36 UTCGHSA enrichment
  5. 2026-08-15 01:30 UTCEPSS rescore
  6. 2026-08-14 22:19 UTCGHSA enrichment
  7. 2026-08-14 11:02 UTCEG score recompute
  8. 2026-08-14 11:02 UTCGHSA enrichment
  9. 2026-08-13 23:46 UTCEG score recompute
  10. 2026-08-13 23:46 UTCGHSA enrichment
  11. 2026-08-13 22:44 UTCEG score recompute▲ 7.80
  12. 2026-08-13 22:44 UTCGHSA enrichment
  13. 2026-08-13 22:44 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  14. 2026-08-13 22:00 UTCEPSS rescore
  15. 2026-08-13 08:26 UTCEG score recompute
  16. 2026-08-13 08:25 UTCGHSA enrichment
  17. 2026-08-12 13:51 UTCEPSS rescore
  18. 2026-08-10 13:24 UTCNVD update
  19. 2026-08-10 12:19 UTCEG score recompute
  20. 2026-08-10 12:17 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-68305?
CVE-2026-68305 is a high vulnerability published on August 10, 2026. In the Linux kernel, the following vulnerability has been resolved: drm/xe/vf: Add drm_dev guards when detaching CCS read/write buffers CCS read/write buffers are freed during BO destruction. In some cases, BOs may be destroyed after the device is unbound but while the DRM structure remains valid,…
When was CVE-2026-68305 disclosed?
CVE-2026-68305 was first published in the National Vulnerability Database on August 10, 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-2026-68305 actively exploited?
CVE-2026-68305 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 97.0% of all scored CVEs.
What is the CVSS score of CVE-2026-68305?
CVE-2026-68305 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-68305?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-68305, 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.

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