CVE-2025-68771

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Source
https://cve.org/CVERecord?id=CVE-2025-68771
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-68771.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-68771
Downstream
Related
Published
2026-01-13T15:28:49.272Z
Modified
2026-03-20T12:46:28.347933Z
Summary
ocfs2: fix kernel BUG in ocfs2_find_victim_chain
Details

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

ocfs2: fix kernel BUG in ocfs2findvictim_chain

syzbot reported a kernel BUG in ocfs2findvictimchain() because the cl_next_free_rec field of the allocation chain list (next free slot in the chain list) is 0, triggring the BUGON(!cl->clnextfreerec) condition in ocfs2findvictimchain() and panicking the kernel.

To fix this, an if condition is introduced in ocfs2claimsuballocbits(), just before calling ocfs2findvictimchain(), 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.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68771.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
ccd979bdbce9fba8412beb3f1de68a9d0171b12c
Fixed
1f77e5cd563e6387fdf3bb714fcda36cd88ac5e7
Fixed
d0fd1f732ea8063cecd07a3879b7d815c7ee71ed
Fixed
b08a33d5f80efe6979a6e8f905c1a898910c21dd
Fixed
96f1b074c98c20f55a3b23d2ab44d9fb0f619869
Fixed
e24aedae71652d4119049f1fbef6532ccbe3966d
Fixed
7acc0390e0dd7474c4451d05465a677d55ad4268
Fixed
039bef30e320827bac8990c9f29d2a68cd8adb5f

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-68771.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.6.16
Fixed
5.10.248
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.198
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.160
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.120
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.64
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.3

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-68771.json"