CVE-2026-97613: Linux kernel · net: mana: Reserve extra CQ slot for the fence completion CQE
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
- 0.2% 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 reserves an extra CQE slot for the fence completion CQE and adjusts the completion queue size accordingly. Users should apply the updated Linux kernel versions that include this fix. No additional mitigation steps are indicated.
Description
A vulnerability in the Linux kernel's MANA network driver was resolved by reserving an extra completion queue (CQ) slot for the fence completion CQE. Previously, the RX completion queue was sized to hold exactly one CQE per posted RX WQE, but the hardware posts an additional CQE_RX_OBJECT_FENCE which was not accounted for, potentially causing the fence completion CQE to be dropped. This could lead to the driver waiting while holding the RTNL lock for the duration of a timeout. The fix involves rounding up the CQ size to accommodate the extra CQE slot.
References
- ubuntu.com/security/CVE-2026-97613 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-97613 (opens in a new tab)
- git.kernel.org/stable/c/1e43c407624d2111c19d4d8ffe9b2191a0ec42de (opens in a new tab)
- git.kernel.org/stable/c/6c739cb89ebd6cf225dac46d2721e11927a7ead4 (opens in a new tab)
- git.kernel.org/stable/c/80dd7e754b3aa9637a0758ad93fa209f9650ec48 (opens in a new tab)
- git.kernel.org/stable/c/62eb52454afcc1d390b8624c5d1ddc92cf382f39 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-97613 (opens in a new tab)
- git.kernel.org/stable/c/f7d76b84b9206eef4320d8ab715d65f944535acf (opens in a new tab)