CVE-2026-89618: Linux kernel · eventfs: Initialize ei->children and ei->list in init_ei()
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
- 0.1% chance of exploitation in 30 days – higher than 6% 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 is available that properly initializes the list heads in the init_ei() function. Users should apply the updated linux-hwe-edge kernel versions that include this correction. Since this is a code initialization fix, updating to patched kernel versions is the recommended remediation.
Description
A vulnerability in the Linux kernel's eventfs subsystem was resolved by properly initializing list heads in the init_ei() function. The flaw involved uninitialized list pointers that could cause false warnings during cleanup if eventfs_create_dir() failed due to memory pressure. This issue affects specific versions of the linux-hwe-edge kernel and has been fixed by moving the list initialization into the init_ei() function.
References
- nvd.nist.gov/vuln/detail/CVE-2026-89618 (opens in a new tab)
- git.kernel.org/stable/c/1704aaaf5d22bc765c168402350d191e24e245bc (opens in a new tab)
- git.kernel.org/stable/c/5333e18e6b425fcc39c7fea89e3949a2a98bc5e4 (opens in a new tab)
- git.kernel.org/stable/c/76e0f85f650738d768449dbccbc7c55d05f5b609 (opens in a new tab)
- git.kernel.org/stable/c/c480f8af173d5b19c6d9c4311df6bbe352face9e (opens in a new tab)
- msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89618.json (opens in a new tab)
- support.microsoft.com/lifecycle (opens in a new tab)
- first.org/cvss (opens in a new tab)
- ubuntu.com/security/CVE-2026-89618 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-89618 (opens in a new tab)
- git.kernel.org/linus/1704aaaf5d22bc765c168402350d191e24e245bc (opens in a new tab)