CVE-2026-74373: Linux kernel · md/raid1,raid10: fix bio accounting for split md cloned bios
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 7.0.0-1014.14~24.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 17:16 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 7.0.0-1014.14~24.04.1, 7.0.0-1017.17~24.04.1, 7.0.0-1016.16~24.04.1 +11
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 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
Upgrade to a fixed release listed under Affected software.
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 patch is available and should be applied to affected Linux kernel versions to resolve the bio accounting issue in md/raid1 and raid10. Users should update to the fixed kernel versions as provided by their distribution or vendor. The vendor advisory confirms the availability of fixes.
Description
A vulnerability in the Linux kernel's md/raid1 and raid10 subsystems related to bio accounting for split md cloned bios has been resolved. The issue involved incorrect accounting when a failed bio is split and resubmitted, potentially causing double or missing accounting. The fix uses md_cloned_bio() to reliably detect md cloned bios and adjust accounting accordingly. Multiple specific Linux kernel versions are affected. A patch is available to address this issue.
References
- nvd.nist.gov/vuln/detail/CVE-2026-74373 (opens in a new tab)
- git.kernel.org/stable/c/ba976e3501111d11c550848b3b7341a73035f582 (opens in a new tab)
- git.kernel.org/stable/c/bb8d7ea74206b419aa05d7773a15a923b668c9f0 (opens in a new tab)
- ubuntu.com/security/CVE-2026-74373 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-74373 (opens in a new tab)
- git.kernel.org/linus/ba976e3501111d11c550848b3b7341a73035f582 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8889-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-3 (opens in a new tab)
- git.kernel.org/stable/c/235d16ae715104b981a4fbc9434398e3816773b1 (opens in a new tab)
- git.kernel.org/stable/c/91d0fc000d8cc40fcb4285e6160dd1ce98c56201 (opens in a new tab)
- git.kernel.org/stable/c/bcf30e14d2bd509c57e93021b46aedc878896e7b (opens in a new tab)