CVE-2026-97617: Linux kernel · ring-buffer: Check resize_disabled before publishing the new subbuf order
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 25 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 has been implemented in the Linux kernel to check the resize_disabled state before publishing the new sub-buffer order, preventing the race condition. Users should update to a patched kernel version containing this fix. Since this is a kernel-level issue, applying the official kernel update from the vendor or distribution is the recommended remediation.
Description
A vulnerability in the Linux kernel's ring-buffer subsystem was resolved by ensuring that the resize_disabled state is checked before publishing a new sub-buffer order. The flaw involved storing the new order before verifying if any CPUs had resizing disabled, which could lead to race conditions when a user-mapped buffer is resized concurrently. This could cause the memory mapping to be resized incorrectly, potentially leading to memory corruption.
References
- ubuntu.com/security/CVE-2026-97617 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-97617 (opens in a new tab)
- git.kernel.org/stable/c/9fd4ea952e6ac12a63c3fe89f08ad02771aa2c06 (opens in a new tab)
- git.kernel.org/stable/c/32bf47db9237c5b8b6f6aaa5356bb4c79d241f76 (opens in a new tab)
- git.kernel.org/stable/c/d860c67c051685abb0460b593b193f0f45f4fa92 (opens in a new tab)
- git.kernel.org/stable/c/f2099644e1b2a2c0805c5240d63ab0522d9d0174 (opens in a new tab)