CVE-2026-68239

UNRATEDCVSS · not yet scored
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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

drm/ttm: Account for NULL and handle pages in ttm_pool_backup

Pages in ttm_pool_backup can be NULL or backup handles (ttm_backup_page_ptr_is_handle()), neither of which can be passed to set_pages_array_wb() or freed. Add a dedicated WB pass before the dma/purge loop that walks allocations using the same i += num_pages stride, skipping NULL and handle entries, and calls set_pages_array_wb() once per contiguous run of real pages. Apply the same NULL/handle guard to the dma/purge loop.

Fixes the following oops:

Oops: general protection fault, kernel NULL pointer dereference 0x0: 0000 [#1] SMP NOPTI RIP: 0010:__cpa_process_fault+0xf8/0x770 RSP: 0018:ffffc90000a87718 EFLAGS: 00010287 RAX: 0000000000000000 RBX: ffffc90000a87868 RCX: 0000000000000000 RDX: 0000000000001000 RSI: 0005088000000000 RDI: ffffffff827c5f34 RBP: 0005088000000000 R08: ffffc90000a877cb R09: ffffc90000a877d0 R10: 0000000000000000 R11: 000000000000001b R12: 000ffffffffff000 R13: ffffc90000a87868 R14: ffffc90000a87868 R15: ffff88815b882ae0 FS: 0000000000000000(0000) GS:ffff8884ec840000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f930b844000 CR3: 000000000262e003 CR4: 0000000008f70ef0 PKRU: 55555554 Call Trace: __change_page_attr_set_clr+0x989/0xe90 ? __purge_vmap_area_lazy+0x6c/0x3a0 ? _vm_unmap_aliases+0x250/0x2a0 set_pages_array_wb+0x7f/0x120 ttm_pool_backup+0x4c9/0x5b0 [ttm] ? dma_resv_wait_timeout+0x3b/0xf0 ttm_tt_backup+0x32/0x60 [ttm] ttm_bo_shrink+0x66/0x110 [ttm] xe_bo_shrink_purge+0x12b/0x1b0 [xe] xe_bo_shrink+0xbb/0x270 [xe] __xe_shrinker_walk+0xf7/0x160 [xe] xe_shrinker_walk+0x9d/0xc0 [xe] xe_shrinker_scan+0x11f/0x210 [xe] do_shrink_slab+0x13b/0x270 shrink_slab+0xf1/0x400 shrink_node+0x352/0x8a0 balance_pgdat+0x32c/0x700 kswapd+0x205/0x2f0 ? __pfx_autoremove_wake_function+0x10/0x10 ? __pfx_kswapd+0x10/0x10 kthread+0xd1/0x110 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x1b1/0x200 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30

CVSS v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

EG Severity
Not assessed: no CVSS publishedA missing CVSS is not a severity of zero.
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
No SSVC decision: EchelonGraph has not assessed this CVECISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the BOD 26-04 block below.

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 10, 2026

Last Modified

August 17, 2026

References (3)

Vendor Advisories for CVE-2026-68239(1)

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

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (161 versions)
  • every version up to 7.1.6-1: fixed in 7.1.6-1
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Data Freshness Timeline

(refreshed 7× in last 7d / 35× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 82 is merged into the row it repeats.

  1. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  2. 2026-10-18 03:19 UTCEG score recompute
  3. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  4. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  5. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  6. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  7. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  8. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  9. 2026-10-12 15:45 UTCEG score recompute
  10. 2026-10-11 19:30 UTCEG score recompute
  11. 2026-10-11 16:45 UTCEG score recompute
  12. 2026-10-11 14:06 UTCEG score recompute
  13. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  14. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  15. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  16. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  18. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  19. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  21. 2026-10-04 05:24 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  22. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  23. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  24. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  25. 2026-09-30 22:39 UTCEG score recompute
Show 56 more
  1. 2026-09-30 22:39 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  2. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  3. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  4. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  5. 2026-09-27 13:21 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  6. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  7. 2026-09-24 09:49 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  8. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  9. 2026-09-21 06:50 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  10. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  11. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  12. 2026-09-18 00:50 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  13. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  14. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  15. 2026-09-14 17:12 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  16. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  17. 2026-09-11 14:13 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  18. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  19. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  20. 2026-09-08 07:24 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  21. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  22. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  23. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  24. 2026-09-05 03:20 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  25. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  26. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  27. 2026-09-01 23:53 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  28. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  29. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  30. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  31. 2026-08-29 20:54 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  32. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  33. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  34. 2026-08-26 14:38 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  35. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  36. 2026-08-23 11:35 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  37. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  38. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  39. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  40. 2026-08-20 08:36 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  41. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  42. 2026-08-18 13:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  43. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  44. 2026-08-17 05:38 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  45. 2026-08-17 05:26 UTCNVD update
  46. 2026-08-17 05:08 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  47. 2026-08-17 05:05 UTCMITRE cvelistV5
  48. 2026-08-16 19:38 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  49. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  50. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  51. 2026-08-13 16:39 UTCEG score recompute
  52. 2026-08-13 16:39 UTCGHSA enrichmentGHSA-9454-9rqj-9cxx
  53. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  54. 2026-08-10 13:24 UTCNVD update
  55. 2026-08-10 12:19 UTCEG score recompute
  56. 2026-08-10 12:17 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-68239?
CVE-2026-68239 is a vulnerability whose severity is not yet rated; its CVE record was published on August 10, 2026. In the Linux kernel, the following vulnerability has been resolved: drm/ttm: Account for NULL and handle pages in ttmpoolbackup Pages in ttmpoolbackup can be NULL or backup handles (ttmbackuppageptris_handle()), neither of which can be passed to setpagesarray_wb() or freed. Add a dedicated WB pass…
When was the CVE record for CVE-2026-68239 published?
The CVE record for CVE-2026-68239 was published on August 10, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 17, 2026; the record at its source may have been updated since.
Is CVE-2026-68239 actively exploited?
CVE-2026-68239 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-68239?
A fix for CVE-2026-68239 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-68239 are linked in the Vendor Advisories panel on this page.

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