CVE-2026-97906: Linux kernel · bootconfig: Fix integer overflow in initrd size check
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 12:55 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 12% 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 is available that validates the initrd size and pointer arithmetic to prevent integer overflow and bounds check bypass. Users should apply the official kernel updates that include these checks. Since this is a kernel-level issue, updating to patched linux-hwe-edge kernel versions is the recommended remediation.
Description
A vulnerability in the Linux kernel's bootconfig initrd size check allows an integer overflow in pointer arithmetic, leading to a bypass of bounds checking. This can cause the kernel to read excessive memory during early boot, resulting in a fatal kernel page fault. The issue affects specific linux-hwe-edge versions and has been fixed by validating initrd size and pointer bounds.
References
- ubuntu.com/security/CVE-2026-97906 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-97906 (opens in a new tab)
- git.kernel.org/stable/c/7812d6dab0698001e50e8c2f901e17da3eb6f429 (opens in a new tab)
- git.kernel.org/stable/c/8d4343a411eaa182d323ab5b149496416015f27d (opens in a new tab)
- git.kernel.org/stable/c/bff9a1579e2c9b2a59fdf3793becc9d7bf5ff1a6 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-97906 (opens in a new tab)
- git.kernel.org/stable/c/4d45bc0f8cdf606d5409b5f64a8a6609f6520c03 (opens in a new tab)