CVE-2026-98373: Linux kernel · mm/hugetlb: preserve mremap address delta when skipping page tables
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 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 7 Oct 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 has been implemented in the Linux kernel to address this vulnerability. Users should update to patched kernel versions corresponding to their distribution. Since this is not a cloud service, remediation requires applying the updated kernel packages. Patch status is confirmed by the resolution note indicating the issue can no longer be reproduced after the fix.
Description
A vulnerability in the Linux kernel's hugetlb memory management subsystem was resolved. The issue involved incorrect advancement of destination addresses during the mremap() operation when skipping page tables, which could lead to kernel panic on x86-64 systems. The flaw was fixed by ensuring the destination address advances by the same amount as the source address. Multiple specific Linux kernel versions are affected.
References
- ubuntu.com/security/CVE-2026-98373 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98373 (opens in a new tab)
- git.kernel.org/linus/9bdad082d44bdcf93716973dcba6be77e8a06e7b (opens in a new tab)
- git.kernel.org/stable/c/480a39b0a12c977ed6e755f3d12a23424c57d11f (opens in a new tab)
- git.kernel.org/stable/c/7a96b0f657c8d799ea5b8e02fc9ec7cca0e6e7ff (opens in a new tab)
- git.kernel.org/stable/c/850cc4a84b36a0062dcd0391acd2450e20ab0767 (opens in a new tab)
- git.kernel.org/stable/c/9bdad082d44bdcf93716973dcba6be77e8a06e7b (opens in a new tab)