CVE-2026-98082: Linux kernel · btrfs: fix the possible bioc_list memory leak during error
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in d043c43d2b4ebcd75ee7f907948ef2847306d6b2 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 UTC
Rated Low by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in d043c43d2b4ebcd75ee7f907948ef2847306d6b2, bb4da45766d16503821f167054db76b735d89e94, afbe73778338e6d1ac8c4486fbdf33f0cc1f2624 +3
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix for this memory leak is available in Linux kernel versions 6.6.158 and 6.7. Users and administrators should upgrade to these or later kernel versions to remediate the issue. No additional mitigation steps are required beyond applying the official patch.
Description
A memory leak vulnerability was identified and fixed in the Linux kernel's btrfs filesystem code. The issue involved the bioc_list memory not being freed properly during certain error conditions in btrfs ordered extents. The fix introduces a cleanup helper function to ensure bioc memory is released in all error paths.
References
- git.kernel.org/stable/c/d043c43d2b4ebcd75ee7f907948ef2847306d6b2 (opens in a new tab)
- git.kernel.org/stable/c/83f0c973cffb184d019390ffdb5d31de5c85bc61 (opens in a new tab)
- git.kernel.org/stable/c/1b4d4e890c2c85d0f6365b5a08c48b4bbf85deb0 (opens in a new tab)
- git.kernel.org/stable/c/bb4da45766d16503821f167054db76b735d89e94 (opens in a new tab)
- git.kernel.org/stable/c/afbe73778338e6d1ac8c4486fbdf33f0cc1f2624 (opens in a new tab)