CVE-2026-97486: Linux kernel · hpfs: 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 the HPFS driver. Users should update to a patched kernel version to mitigate this issue. Since this is a kernel-level fix, upgrading the kernel to a version including this patch is the recommended remediation.
Description
A vulnerability in the Linux kernel's HPFS filesystem driver was resolved that involved improper handling of set_blocksize failures. The HPFS driver uses buffer_heads, which do not handle block sizes larger than PAGE_SIZE correctly. This flaw could cause a kernel BUG_ON condition during mounting due to an offset check failure in folio_set_bh on the first __bread_gfp call.
References
- ubuntu.com/security/CVE-2026-97486 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-97486 (opens in a new tab)
- git.kernel.org/stable/c/a405996f23e04942aad064ab8d50c55827482872 (opens in a new tab)
- git.kernel.org/stable/c/fc79fcc78cb771f2a803e52149cac5ca9050fd05 (opens in a new tab)
- git.kernel.org/stable/c/f27e21cf3c0446a3536ea9b588a78a46b0a2cb66 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-97486 (opens in a new tab)
- git.kernel.org/stable/c/0451927f42b0282d80d402e8e8c46ff34e9f606f (opens in a new tab)
- git.kernel.org/stable/c/10f226687bcb07ed925a453b6f25e817165d113b (opens in a new tab)
- git.kernel.org/stable/c/b618f681acb6748faf95eee9af2aac5455a74e68 (opens in a new tab)
- git.kernel.org/stable/c/f7b0cde62edb8ceff8bcc17ba3f1b086646fff89 (opens in a new tab)