CVE-2026-89515: Linux kernel · scsi: core: Fill in DMA padding bytes in scsi_alloc_sgtables()
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 7% 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 by extending the last scatterlist entry length and zeroing the padding bytes. Users should apply the official kernel updates that include this fix. Since this is a kernel-level issue, updating to a patched kernel version is the recommended remediation. No additional mitigations are specified.
Description
A vulnerability in the Linux kernel's SCSI core was resolved involving uninitialized DMA padding bytes in the scsi_alloc_sgtables() function. During fuzz testing, an uninitialized memory usage was detected when processing the last unaligned scatterlist element, where padding bytes remained uninitialized. The fix involves extending the length of the last scatterlist entry and zeroing the padding bytes to prevent uninitialized memory access.
References
- nvd.nist.gov/vuln/detail/CVE-2026-89515 (opens in a new tab)
- git.kernel.org/stable/c/626147717bea776b61ed3631d2c26283760c4cc4 (opens in a new tab)
- git.kernel.org/stable/c/6fd1cce5018fdcc8d928e00a6a1dd2997d5b9409 (opens in a new tab)
- git.kernel.org/stable/c/a4353ec7742bdf87dcdde5875270feb3a1982a51 (opens in a new tab)
- git.kernel.org/stable/c/e7143c3f4e5c0a7986733c6f27009274bf6c4264 (opens in a new tab)
- ubuntu.com/security/CVE-2026-89515 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-89515 (opens in a new tab)
- git.kernel.org/linus/626147717bea776b61ed3631d2c26283760c4cc4 (opens in a new tab)