CVE-2026-97490: Linux kernel · affs: handle set_blocksize failures
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 17:16 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 24 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 has been applied to the Linux kernel to properly handle set_blocksize failures in affs. Users should update to a patched kernel version to remediate this issue. No additional mitigation steps are indicated.
Description
A vulnerability in the Linux kernel's affs filesystem code has been resolved. The issue arises because affs uses buffer_heads that do not handle block sizes larger than PAGE_SIZE correctly, leading to a kernel BUG_ON condition during mounting. This could cause system instability or crashes when mounting affected filesystems.
References
- ubuntu.com/security/CVE-2026-97490 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-97490 (opens in a new tab)
- git.kernel.org/stable/c/0861182af5983a39bd2a891966436c5679b74a45 (opens in a new tab)
- git.kernel.org/stable/c/bb45146a661934ef801f8fc62f88cdbcf6584ed1 (opens in a new tab)
- git.kernel.org/stable/c/e01af5aa641039e000af855f448475316f0550fc (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-97490 (opens in a new tab)
- git.kernel.org/stable/c/c7f29c5d999093629712c63792abda89a36b428d (opens in a new tab)
- git.kernel.org/stable/c/d05b0ee9b42cb3cc499272d1bc91609f7492a1a8 (opens in a new tab)
- git.kernel.org/stable/c/ea8a4a9f3cc101207611be724a8b83838de9a93f (opens in a new tab)
- git.kernel.org/stable/c/f5d65b2811872e8f8b424860fa7c2500afbbc5a6 (opens in a new tab)