CVE-2026-89496

UNRATEDCVSS · not yet scoredTrending — 4 sources updated this week
—
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:

ocfs2: always run deallocs on copy-on-write completion

Local fuzzing of 6.12.94 has found the following memory leak caused by doing 'copy_file_range()' within the same filesystem:

unreferenced object 0xffff88812192c980 (size 32): comm "syz.0.49", pid 12095, jiffies 4294964143 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 ................ c0 c5 92 21 81 88 ff ff 00 02 00 00 00 06 00 00 ...!............ backtrace (crc 7068d63f): kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline] slab_post_alloc_hook mm/slub.c:4152 [inline] slab_alloc_node mm/slub.c:4197 [inline] __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358 kmalloc_noprof include/linux/slab.h:878 [inline] ocfs2_find_per_slot_free_list fs/ocfs2/alloc.c:6618 [inline] ocfs2_cache_block_dealloc+0x155/0x4b0 fs/ocfs2/alloc.c:6786 ocfs2_cache_extent_block_free fs/ocfs2/alloc.c:6819 [inline] ocfs2_unlink_path+0x286/0x450 fs/ocfs2/alloc.c:2613 ocfs2_rotate_subtree_left fs/ocfs2/alloc.c:2779 [inline] __ocfs2_rotate_tree_left+0x1f6f/0x2da0 fs/ocfs2/alloc.c:2985 ocfs2_rotate_tree_left+0x283/0xe00 fs/ocfs2/alloc.c:3237 ocfs2_try_to_merge_extent+0xf56/0x1a20 fs/ocfs2/alloc.c:3825 ocfs2_split_extent+0x15f4/0x2940 fs/ocfs2/alloc.c:5138 ocfs2_clear_ext_refcount+0x2f6/0x550 fs/ocfs2/refcounttree.c:3098 ocfs2_replace_clusters fs/ocfs2/refcounttree.c:3131 [inline] ocfs2_make_clusters_writable fs/ocfs2/refcounttree.c:3255 [inline] ocfs2_replace_cow+0x991/0x1660 fs/ocfs2/refcounttree.c:3349 ocfs2_refcount_cow_hunk fs/ocfs2/refcounttree.c:3427 [inline] ocfs2_refcount_cow+0x5e1/0x9f0 fs/ocfs2/refcounttree.c:3470 ocfs2_prepare_inode_for_write fs/ocfs2/file.c:2340 [inline] ocfs2_file_write_iter+0xbda/0x1880 fs/ocfs2/file.c:2451 iter_file_splice_write+0x890/0xf60 fs/splice.c:743 do_splice_from fs/splice.c:944 [inline] direct_splice_actor+0x232/0x480 fs/splice.c:1167 splice_direct_to_actor+0x4b4/0xb60 fs/splice.c:1111 do_splice_direct_actor fs/splice.c:1210 [inline] do_splice_direct+0x10f/0x1c0 fs/splice.c:1236 do_sendfile+0x430/0xbf0 fs/read_write.c:1388

unreferenced object 0xffff88812192c5c0 (size 32): comm "syz.0.49", pid 12095, jiffies 4294964143 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 29 70 00 00 00 00 00 00 19 00 00 00 00 00 00 00 )p.............. backtrace (crc afec850f): kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline] slab_post_alloc_hook mm/slub.c:4152 [inline] slab_alloc_node mm/slub.c:4197 [inline] __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] ocfs2_cache_block_dealloc+0x25c/0x4b0 fs/ocfs2/alloc.c:6793 ocfs2_cache_extent_block_free fs/ocfs2/alloc.c:6819 [inline] ocfs2_unlink_path+0x286/0x450 fs/ocfs2/alloc.c:2613 ocfs2_rotate_subtree_left fs/ocfs2/alloc.c:2779 [inline] __ocfs2_rotate_tree_left+0x1f6f/0x2da0 fs/ocfs2/alloc.c:2985 ocfs2_rotate_tree_left+0x283/0xe00 fs/ocfs2/alloc.c:3237 ocfs2_try_to_merge_extent+0xf56/0x1a20 fs/ocfs2/alloc.c:3825 ocfs2_split_extent+0x15f4/0x2940 fs/ocfs2/alloc.c:5138 ocfs2_clear_ext_refcount+0x2f6/0x550 fs/ocfs2/refcounttree.c:3098 ocfs2_replace_clusters fs/ocfs2/refcounttree.c:3131 [inline] ocfs2_make_clusters_writable fs/ocfs2/refcounttree.c:3255 [inline] ocfs2_replace_cow+0x991/0x1660 fs/ocfs2/refcounttree.c:3349 ocfs2_refcount_cow_hunk fs/ocfs2/refcounttree.c:3427 [inline] ocfs2_refcount_cow+0x5e1/0x9f0 fs/ocfs2/refcounttree.c:3470 ocfs2_prepare_inode_for_write fs/ocfs2/file.c:2340 [inline] ocfs2_file_write_iter+0xbda/0x1880 fs/ocfs2/file.c:2451 iter_file_splice_write+0x890/0xf60 fs/splice.c:743 do_splice_from fs/splice.c:9 ---truncated---

CVSS v3
—
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
—
EG Risk
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EPSS PROB
0.2%
EPSS %ILE
6th
KEV
Not listed

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

September 11, 2026

Last Modified

September 14, 2026

References (8)

Vendor Advisories for CVE-2026-89496(1)

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

Affected Packages

(4 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (360 versions)
  • every version on: no fix on record
—
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1, 6.12.107-1~deb12u1
  • every version up to 6.12.111-1~deb12u1: fixed in 6.12.111-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (35 versions)
  • every version up to 6.12.111-1: fixed in 6.12.111-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (179 versions)
  • every version up to 7.2.6-1: fixed in 7.2.6-1
—

All Vendor Advisories

(1)

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 15× in last 7d / 53× 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.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  3. 2026-10-12 14:48 UTCEG score recompute
  4. 2026-10-11 19:15 UTCEG score recompute
  5. 2026-10-11 16:32 UTCEG score recompute
  6. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  7. 2026-10-11 13:47 UTCEG score recompute
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  9. 2026-10-10 11:39 UTCVendor advisory
  10. 2026-10-10 11:39 UTCGHSA enrichmentGHSA-wxhh-3jvh-r4hp
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  14. 2026-10-07 14:38 UTCVendor advisory
  15. 2026-10-07 14:38 UTCGHSA enrichmentGHSA-wxhh-3jvh-r4hp
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  17. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  18. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-10-04 17:27 UTCVendor advisory
  20. 2026-10-04 17:27 UTCGHSA enrichmentGHSA-wxhh-3jvh-r4hp
  21. 2026-10-01 20:09 UTCVendor advisory
  22. 2026-10-01 20:09 UTCGHSA enrichmentGHSA-wxhh-3jvh-r4hp
  23. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  25. 2026-09-28 23:04 UTCEG score recompute
Show 33 more
  1. 2026-09-28 23:04 UTCVendor advisory
  2. 2026-09-28 23:04 UTCGHSA enrichmentGHSA-wxhh-3jvh-r4hp
  3. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  4. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  5. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  6. 2026-09-26 02:04 UTCVendor advisory
  7. 2026-09-26 02:03 UTCGHSA enrichmentGHSA-wxhh-3jvh-r4hp
  8. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  9. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  10. 2026-09-23 05:01 UTCVendor advisory
  11. 2026-09-23 05:01 UTCGHSA enrichmentGHSA-wxhh-3jvh-r4hp
  12. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  14. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-09-20 08:01 UTCVendor advisory
  16. 2026-09-20 08:01 UTCGHSA enrichmentGHSA-wxhh-3jvh-r4hp
  17. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  18. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  19. 2026-09-17 10:35 UTCVendor advisory
  20. 2026-09-17 10:34 UTCGHSA enrichmentGHSA-wxhh-3jvh-r4hp
  21. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  22. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  23. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  24. 2026-09-14 13:33 UTCGHSA enrichmentGHSA-wxhh-3jvh-r4hp
  25. 2026-09-14 13:27 UTCNVD update
  26. 2026-09-14 12:30 UTCEG score recompute
  27. 2026-09-14 12:30 UTCGHSA enrichmentGHSA-wxhh-3jvh-r4hp
  28. 2026-09-14 12:24 UTCMITRE cvelistV5
  29. 2026-09-13 16:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  30. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  31. 2026-09-11 20:36 UTCNVD update
  32. 2026-09-11 19:51 UTCEG score recompute
  33. 2026-09-11 19:49 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-89496?
CVE-2026-89496 is a vulnerability whose severity is not yet rated; its CVE record was published on September 11, 2026. In the Linux kernel, the following vulnerability has been resolved: ocfs2: always run deallocs on copy-on-write completion Local fuzzing of 6.12.94 has found the following memory leak caused by doing 'copyfilerange()' within the same filesystem: unreferenced object 0xffff88812192c980 (size 32):…
When was the CVE record for CVE-2026-89496 published?
The CVE record for CVE-2026-89496 was published on September 11, 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 September 14, 2026; the record at its source may have been updated since.
Is CVE-2026-89496 actively exploited?
CVE-2026-89496 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-89496?
A fix for CVE-2026-89496 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-89496 are linked in the Vendor Advisories panel on this page.

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