CVE-2026-93197: Linux kernel · memcg: move LRU size accounting on reparenting instead of copying it
Affects Linux kernelSource CVE Database V5
Not known to be exploited : upgrade to 007bc1842317bb99f5f6205afede940f951674c2 or 0e0ac326c511d514817cc7b6d7741afd59098ce2 when convenient.
Data as of 26 Oct 2026, 14:03 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 007bc1842317bb99f5f6205afede940f951674c2, 0e0ac326c511d514817cc7b6d7741afd59098ce2
Exploitation evidence
Disclosed: evidence found.
CVE published 17 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
Upgrade Linux kernel to 007bc1842317bb99f5f6205afede940f951674c2 or 0e0ac326c511d514817cc7b6d7741afd59098ce2.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix for this vulnerability is available and included in the Linux kernel commits 007bc1842317bb99f5f6205afede940f951674c2 and 0e0ac326c511d514817cc7b6d7741afd59098ce2. Users should upgrade to a kernel version containing these commits or later. No other mitigation actions are indicated.
Description
CVE-2026-93197 is a vulnerability in the Linux kernel's memory cgroup (memcg) subsystem involving incorrect handling of LRU size accounting during reparenting of memory cgroups. When a memory cgroup is offlined, its LRU folios are reparented to the parent cgroup, but the child's LRU size counters are not cleared, causing size values to be copied rather than moved. This leads to stale counters on the child cgroup, which can cause excessive scanning and resource accounting inaccuracies. The issue affects Linux kernel version 7.1 and has been fixed in specific commits.