CVE-2026-97488: Linux kernel · qnx4: handle set_blocksize failures
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 14:05 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 for this vulnerability has been implemented in the Linux kernel. Users should apply the official kernel updates that address this issue. No additional mitigation steps are indicated in the provided data.
Description
A vulnerability in the Linux kernel's qnx4 filesystem handling has been resolved. The issue involves improper handling of set_blocksize failures due to qnx4's use of buffer_heads, which do not support block sizes larger than PAGE_SIZE. This flaw causes a kernel BUG_ON condition during mounting on the first __bread_gfp call.
References
- ubuntu.com/security/CVE-2026-97488 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-97488 (opens in a new tab)
- git.kernel.org/stable/c/c7d911ea1cc9a63b07e52f5e75b263be0615b289 (opens in a new tab)
- git.kernel.org/stable/c/aac97a4b3f47c36a47f934aa679407b718b67537 (opens in a new tab)
- git.kernel.org/stable/c/60f7ccf669882262330171eda51a4f52fa2e69c9 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-97488 (opens in a new tab)
- git.kernel.org/stable/c/3f2088a3973faf3ed9b56ea3d3f0240b9a797016 (opens in a new tab)
- git.kernel.org/stable/c/c9f03e750d9ddf0f42c24e3ba683f26e377ffd72 (opens in a new tab)
- git.kernel.org/stable/c/de8bd760ca0c2a3f337bbafbeb1dcad0853787cc (opens in a new tab)
- git.kernel.org/stable/c/f83e416c2242fb298ad33b756c83aae75d9e359c (opens in a new tab)