CVE-2026-89591: Linux kernel · accel/rocket: initialize job domain before cleanup paths
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 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 11 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 for this vulnerability has been implemented in the Linux kernel. Users should update to patched kernel versions that include this fix. Since this is a kernel-level issue, applying the official kernel updates provided by the Linux distribution is the recommended remediation. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor or distribution advisory for the latest remediation guidance.
Description
A vulnerability in the Linux kernel's accel/rocket component involves improper initialization of the job domain before cleanup paths. Specifically, the function rocket_ioctl_submit_job() may release a job structure with a NULL domain pointer due to error paths occurring before domain assignment. This can lead to unsafe cleanup operations. The issue has been resolved by ensuring the domain reference is taken before any error path can release the job and by clearing task pointers after freeing to prevent double-free errors.
References
- nvd.nist.gov/vuln/detail/CVE-2026-89591 (opens in a new tab)
- git.kernel.org/stable/c/3043230296653a609ab50006899e64bbb2d99465 (opens in a new tab)
- git.kernel.org/stable/c/70e6a33d68a9b03335c5426332666e52d07f45d6 (opens in a new tab)
- git.kernel.org/stable/c/81731f1eda5e6a1dfad31445f741de9bbefbb08e (opens in a new tab)
- ubuntu.com/security/CVE-2026-89591 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-89591 (opens in a new tab)
- git.kernel.org/linus/70e6a33d68a9b03335c5426332666e52d07f45d6 (opens in a new tab)