CVE-2026-98157: Linux kernel · EDAC/device_sysfs: Use kstrtouint() for poll_msec to prevent truncation
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 5.5 Medium.
Data as of 26 Oct 2026, 15:59 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation 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 replaces simple_strtoul() with kstrtouint() for parsing poll_msec and adds validation to reject zero or overly large values. Users should apply the official kernel updates that include this fix. No additional mitigation is required beyond applying the patch.
Description
A vulnerability in the Linux kernel's EDAC device_sysfs interface involved improper handling of the poll_msec parameter, which could cause silent truncation of values on 64-bit systems and lead to a 100% CPU usage spin condition. The issue was fixed by replacing simple_strtoul() with kstrtouint() to properly validate input and reject invalid values.
References
- ubuntu.com/security/CVE-2026-98157 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98157 (opens in a new tab)
- git.kernel.org/stable/c/528052af901d6e6bbfa0e52362a70a58a5dd1e43 (opens in a new tab)
- git.kernel.org/stable/c/ea01c061d839b520f385f112908de1c6e3391327 (opens in a new tab)
- git.kernel.org/stable/c/66cc9dec919dd63d8e4b3d386f7aed3ae684e645 (opens in a new tab)
- git.kernel.org/stable/c/0e022ee4f8e0dc843ba4c80bb75408a7704279af (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-98157 (opens in a new tab)
- git.kernel.org/stable/c/541fc6f733b32463cf23277637bb07e2aaa00b53 (opens in a new tab)
- git.kernel.org/stable/c/656e2fe98ac452db4e5b8147d1f33b8c35b4ec4b (opens in a new tab)
- git.kernel.org/stable/c/a60794ee3f453516ab3ed212ba0295ecf890bc8c (opens in a new tab)
- git.kernel.org/stable/c/f856511058c8cb470d6c6c7ce908870adcdc7dc6 (opens in a new tab)