CVE-2026-89859: Linux kernel · scsi: qla2xxx: Zero dport diagnostics buffer to avoid info leak
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 16 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 allocation method to zero the diagnostics buffer before use, preventing information leakage. Users should apply the updated Linux kernel versions that include this patch. Specific patched versions are not listed here, so consult the vendor or distribution advisory for the fixed kernel releases.
Description
A vulnerability in the Linux kernel's qla2xxx SCSI driver allows uninitialized kernel heap memory to be leaked to user space due to improper zeroing of the diagnostics buffer. This occurs because the qla_dport_diag response buffer is allocated without zeroing, and some fields are copied out uninitialized, potentially exposing sensitive kernel memory contents.
References
- ubuntu.com/security/CVE-2026-89859 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-89859 (opens in a new tab)
- git.kernel.org/linus/a152edab3854f01dd2daf3eaf8f32cbabdb3834e (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-89859 (opens in a new tab)
- git.kernel.org/stable/c/5dfc77099c7d9fde9520a229794b0154d7ccccc1 (opens in a new tab)
- git.kernel.org/stable/c/9fc03be982763a131913f84fe73b240ae45bca37 (opens in a new tab)
- git.kernel.org/stable/c/a152edab3854f01dd2daf3eaf8f32cbabdb3834e (opens in a new tab)
- git.kernel.org/stable/c/d6e2411516bb95e52cb74c9c56b60ad2548a2730 (opens in a new tab)