CVE-2026-97534: Linux kernel · f2fs: accurately adjust free_sections during free_segment_range
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
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
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix for this vulnerability has been implemented in the Linux kernel versions listed as affected. Users should apply the official kernel updates that include this fix to resolve the issue. Since this is a kernel-level fix, upgrading to patched kernel versions is the recommended remediation.
Description
A vulnerability in the Linux kernel's f2fs filesystem was resolved that involved incorrect accounting of free sections during garbage collection. The issue caused the filesystem to overestimate available free sections, potentially leading to allocation failures or assertion errors under tight space conditions. The fix adjusts free section counts accurately during segment freeing operations.
References
- ubuntu.com/security/CVE-2026-97534 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-97534 (opens in a new tab)
- git.kernel.org/stable/c/8c963d1738fdca400082ff5f9d99e083de4f4e70 (opens in a new tab)
- git.kernel.org/stable/c/8a123a10770d2132d046748f20f02baa8d5539a1 (opens in a new tab)
- git.kernel.org/stable/c/ca31116fad0954c61a0d38163cc51c48e4981b75 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-97534 (opens in a new tab)
- git.kernel.org/stable/c/faeb0a20bdd113311519b598dcc075af3b6fb366 (opens in a new tab)