CVE-2026-80564: Linux kernel · gve: fix NULL dereference due to missing ptp adjfine
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
- 0.2% 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 26 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
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.
Description
In the Linux kernel, the following vulnerability has been resolved: gve: fix NULL dereference due to missing ptp adjfine Fix NULL dereference due to missing implementation of adjfine, which can be triggered from usermode as follows: sudo ./testptp -d /dev/ptp0 -f 0 [ 551.943697] BUG: kernel NULL pointer dereference, address: 0000000000000000 [...] [ 552.061946] Call Trace: [ 552.064487] <TASK> [ 552.066681] ptp_clock_adjtime+0x1c0/0x2c0 [ 552.070874] ? get_clock_desc+0x6b/0xb0 [ 552.074825] pc_clock_adjtime+0x78/0xc0 [ 552.078755] __do_sys_clock_adjtime+0x85/0x110 [ 552.083293] do_syscall_64+0xea/0x610
References
- ubuntu.com/security/CVE-2026-80564 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-80564 (opens in a new tab)
- git.kernel.org/stable/c/3992ced109c70b771efad9e51ae68e5c7a04dea3 (opens in a new tab)
- git.kernel.org/stable/c/fa9b991bf678dd412dc0ed080672d34d7558d7af (opens in a new tab)
- git.kernel.org/stable/c/e9482feeed66d4bc805458631013e9b61b1a9eaf (opens in a new tab)