CVE-2026-80679: Linux kernel · s390/dasd: Fix potential NULL pointer dereference
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 5.15.0-1117.124~20.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 12:55 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.
- Patch
- Available – fixed in 5.15.0-1117.124~20.04.1, 5.15.0-1123.132~20.04.1, 5.15.0-1122.131~20.04.1 +26
Exploitation evidence
Disclosed: evidence found.
CVE published 28 Aug 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
Upgrade to a fixed release listed under Affected software.
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
An official patch is available and should be applied to affected Linux kernel versions. Users should update their systems to the fixed kernel releases to remediate this vulnerability. No additional mitigation steps are required beyond applying the update.
Description
A vulnerability in the Linux kernel's s390/dasd driver could lead to a NULL pointer dereference due to improper checking of a function pointer before invocation. This flaw was fixed by correcting the logical operator used to check the function pointer, preventing potential system crashes. The issue affects multiple specific kernel versions and has been addressed in official updates.
References
- nvd.nist.gov/vuln/detail/CVE-2026-80679 (opens in a new tab)
- git.kernel.org/stable/c/3000367a512b1283ca52230bf21f8c91dfbec45b (opens in a new tab)
- git.kernel.org/stable/c/3453a993a3f14c1684560ecf26585046976f6ac6 (opens in a new tab)
- git.kernel.org/stable/c/86cdfd061509bcde84f3145f7221ba64e3e53b1f (opens in a new tab)
- git.kernel.org/stable/c/96b8e09b09539f252a5eeea6baebd93c2e3779bd (opens in a new tab)
- git.kernel.org/stable/c/9973026f572db6b67570cadc30942f3014e41079 (opens in a new tab)
- git.kernel.org/stable/c/cdc7b73d0c5a9cd6360b4f8c36eae23b02097e4c (opens in a new tab)
- git.kernel.org/stable/c/dbf2ae34d2f1390a9fc1abf3dce7f809e022caae (opens in a new tab)
- git.kernel.org/stable/c/e156c70c505c6c9adce3b7be5a82025f00544709 (opens in a new tab)
- ubuntu.com/security/CVE-2026-80679 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-80679 (opens in a new tab)
- git.kernel.org/linus/9973026f572db6b67570cadc30942f3014e41079 (opens in a new tab)
- msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-80679.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/notices/USN-8878-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8879-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8877-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8875-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8875-2 (opens in a new tab)