CVE-2026-68165: Linux kernel · mm/damon/core: validate ranges in damon_set_regions()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in c927b73a5694c735314ea10e7c81c07f9bd51ad7 : update Linux kernel when convenient.
Data as of 6 Nov 2026, 17:19 UTC
Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in c927b73a5694c735314ea10e7c81c07f9bd51ad7, b585facbafbb5cf117b37b1c75819ac046646c27, 1292c0ecb1caefb8ca064a3639d5673991e8810c +3
Exploitation evidence
Disclosed: evidence found.
CVE published 10 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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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 source to validate and reject zero-length monitoring regions in damon_set_regions(). Users should update to a fixed kernel version that includes these patches. No additional mitigation is required beyond applying the official fix.
Description
A vulnerability in the Linux kernel's DAMON subsystem allows zero-length memory monitoring regions to be set, which the core logic does not expect. This can cause kernel warnings and a divide-by-zero error in damon_merge_two_regions(). The issue arises because some DAMON API callers permit empty monitoring regions, triggering WARN_ONCE() and potential kernel instability when CONFIG_DAMON_DEBUG_SANITY is enabled. The flaw has been fixed by adding validation in damon_set_regions().
References
- git.kernel.org/stable/c/71cf8a3ee1c18cfa8b88cc14bac9c2f43dd29f9b (opens in a new tab)
- git.kernel.org/stable/c/b585facbafbb5cf117b37b1c75819ac046646c27 (opens in a new tab)
- git.kernel.org/stable/c/c927b73a5694c735314ea10e7c81c07f9bd51ad7 (opens in a new tab)
- git.kernel.org/stable/c/4b6f1d6d5d07855bd1bb9e64922b049062138bfa (opens in a new tab)
- git.kernel.org/stable/c/43aaddd0fa92010a68adeda7744c7cf497a1c8e9 (opens in a new tab)
- git.kernel.org/stable/c/1292c0ecb1caefb8ca064a3639d5673991e8810c (opens in a new tab)