CVE-2026-97619: Linux kernel · io_uring/rw: end write accounting from ->ki_complete
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 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.
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 changes the write accounting to end in io_complete_rw() instead of deferring it to task_work. Users should apply the updated Linux kernel versions that include this fix. Patch status is confirmed by the resolution commit described; no additional mitigation is indicated.
Description
A vulnerability in the Linux kernel's io_uring write accounting mechanism was resolved by changing where the write accounting ends. Previously, deferring the write accounting to task_work caused a deadlock with the superblock freeze mechanism, potentially blocking completion of writes. The fix moves the write accounting end to io_complete_rw(), preventing this deadlock condition.
References
- ubuntu.com/security/CVE-2026-97619 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-97619 (opens in a new tab)
- git.kernel.org/stable/c/cc580cee4dfa2ec9099c30ecbd4d804cbb996432 (opens in a new tab)
- git.kernel.org/stable/c/055d43a1233edbd80e558889258105ce63051bcd (opens in a new tab)
- git.kernel.org/stable/c/796aa0547557e63338657ed1c487906f9fac4c73 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-97619 (opens in a new tab)
- git.kernel.org/stable/c/696459029f3b65c070c91b729478475582f1dcdf (opens in a new tab)