8.8

CVE-2026-68098: linux Out-of-bounds Read

CVSS: 8.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-68098DEBIAN-CVE-2026-68098
Published 10-08-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-68098 is a high (CVSS 8.8) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 34.3% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.41%
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 11 · Related 9
MGASA-2026-0336MGASA-2026-0337USN-8886-1USN-8887-1USN-8887-2USN-8887-3

Timeline

  1. 10-08-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: bound DACL dedup walk to copied ACEs set_ntacl_dacl() can stop copying ACEs before consuming the full input DACL when size accounting overflows. When that happens, num_aces reflects only the ACEs that were actually copied into the output DACL, but set_posix_acl_entries_dacl() still receives nt_num_aces and uses it to walk the existing ACE array during dedup. That makes the dedup walk scan past the copied ACE array and inspect buffer tail that does not contain valid ACEs. Split the two meanings currently carried by the NT ACE count. Pass the number of copied NT ACEs to bound the dedup walk, and preserve the original "input DACL had NT ACEs" state separately for the Everyone/default ACL fallback. This keeps the dedup walk aligned with the ACEs that are actually present in the rebuilt DACL.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.41%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

0.00 pp

From 0.41% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.41%

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

Affected systems

Ubuntu169 products
  • linuxAll versions (No fix recorded) | < 6.8.0-147.147 | < 7.0.0-38.38
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1067.70 | < 7.0.0-1014.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linuxAll versions (No fix recorded) | < 6.12.101-1 | < 7.1.6-1
  • linux-6.12< 6.12.101-1~deb12u1
Linux1 product
  • linux≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 6d9d7aa4a2c99c31acfa28921c30b684110cf66c | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < b057a851129c6a084e7e393b62ca3abf6c2660bc | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < f1eba60db813ec28732bf18b5f0a67ebac9c3100 | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < a0ebdaa79e10210d4e8ed9fe138e8f4d569719e3 | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 58d97fcd0bf1aee694e244cc28635b9df95b543b | 5.15

3 vendors · 172 products

References

18 links
Show all 18 references