CVE-2026-89525: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-89525DEBIAN-CVE-2026-89525
Published 11-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-89525 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.6% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.18%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 10 · Related 10
OPENSUSE-SU-2026:11893-1OPENSUSE-SU-2026:22091-1SUSE-SU-2026:24179-1SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1SUSE-SU-2026:24184-1

Timeline

  1. 11-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: udf: reject VAT indexes equal to the entry count UDF 1.50 virtual partition mapping uses the VAT as an array of physical block mappings. s_num_entries stores the number of entries in that array, not the highest valid index. The valid VAT indexes are therefore below s_num_entries. udf_get_pblock_virt15() currently rejects only indexes greater than s_num_entries. A crafted image can request index s_num_entries, pass the bounds check, and make the kernel read one entry past the allocated VAT table. Change the check to reject block >= s_num_entries, so the count is handled as an exclusive upper bound. A crafted UDF image reproduced this on origin/master commit 0e35b9b6ec0ffcc5e23cbdec09f5c622ad532b53 with a KASAN slab-out-of-bounds report in udf_get_pblock_virt15(). Trail of Bits has a reproducer that triggers kernel panic demonstrating the bug, and can share it if needed.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

0.00 pp

From 0.18% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.18%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu169 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.111-1 | < 7.2.6-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < f64e01a90326bb85a3cc8aa0199931dc2f15b589 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 8a8c1c42a34349a0626d910abbad5a29136446b7 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 19f36c6453cd88fe6d60ef36ab1f1cad8ddf4ce4 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b77b83f5529a26d084d64ece98abd6f0cc86e053 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9193368408d792cec2057628d87862140fb1ce1c | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b95c33a4e743874f1b0a45bf2aaa4da553552bd1 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1bd7947f1463c21edafa256d0fbec5b99215e2b6 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < cac0cb07f29ccfb373fd4a36c81e908ef3ce608c | 2.6.12

3 vendors · 172 products

References

13 links
Show all 13 references