CVE-2025-68771: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2025-68771DEBIAN-CVE-2025-68771
Published 13-01-2026Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-68771 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.2% 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
0.21%
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 50 · Related 46
DLA-4475-1DLA-4476-1DSA-6126-1DSA-6127-1MGASA-2026-0017MGASA-2026-0018

Timeline

  1. 13-01-2026
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix kernel BUG in ocfs2_find_victim_chain syzbot reported a kernel BUG in ocfs2_find_victim_chain() because the `cl_next_free_rec` field of the allocation chain list (next free slot in the chain list) is 0, triggring the BUG_ON(!cl->cl_next_free_rec) condition in ocfs2_find_victim_chain() and panicking the kernel. To fix this, an if condition is introduced in ocfs2_claim_suballoc_bits(), just before calling ocfs2_find_victim_chain(), the code block in it being executed when either of the following conditions is true: 1. `cl_next_free_rec` is equal to 0, indicating that there are no free chains in the allocation chain list 2. `cl_next_free_rec` is greater than `cl_count` (the total number of chains in the allocation chain list) Either of them being true is indicative of the fact that there are no chains left for usage. This is addressed using ocfs2_error(), which prints the error log for debugging purposes, rather than panicking the kernel.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

0.00 pp

From 0.20% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.21%

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

Ubuntu157 products
  • linuxAll versions (No fix recorded) | < 5.15.0-173.183 | < 6.8.0-110.110 | < 6.17.0-22.22
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1103.110 | < 6.8.0-1052.55 | < 6.17.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.162-1 | < 6.12.69-1 | < 6.18.3-1
Linux1 product
  • linux≥ ccd979bdbce9fba8412beb3f1de68a9d0171b12c, < 1f77e5cd563e6387fdf3bb714fcda36cd88ac5e7 | ≥ ccd979bdbce9fba8412beb3f1de68a9d0171b12c, < d0fd1f732ea8063cecd07a3879b7d815c7ee71ed | ≥ ccd979bdbce9fba8412beb3f1de68a9d0171b12c, < b08a33d5f80efe6979a6e8f905c1a898910c21dd | ≥ ccd979bdbce9fba8412beb3f1de68a9d0171b12c, < 96f1b074c98c20f55a3b23d2ab44d9fb0f619869 | ≥ ccd979bdbce9fba8412beb3f1de68a9d0171b12c, < e24aedae71652d4119049f1fbef6532ccbe3966d | ≥ ccd979bdbce9fba8412beb3f1de68a9d0171b12c, < 7acc0390e0dd7474c4451d05465a677d55ad4268 | ≥ ccd979bdbce9fba8412beb3f1de68a9d0171b12c, < 039bef30e320827bac8990c9f29d2a68cd8adb5f | 2.6.16

3 vendors · 159 products

References

41 links
Show all 41 references