VulnerabilityPublished 10 Aug 2026Updated 6 Nov 2026

CVE-2026-68164: Linux kernel · mm/damon/core: disallow overlapping input ranges for damon_set_regions()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in e33adf96afb5883f84b0d98747976bde293e33cb : update Linux kernel when convenient.

Data as of 6 Nov 2026, 17:19 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

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 e33adf96afb5883f84b0d98747976bde293e33cb, a5c453fffb6f2ce75fc10b5d8bc475f1758010bd, 954157679ec34661c2e87e7eb796104a797c32db +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.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 97d482f4592fde2322c319f07bc54f3a0d37861c, < e33adf96afb5883f84b0d98747976bde293e33cb	Fixed in e33adf96afb5883f84b0d98747976bde293e33cb
LinuxLinux	Affected ≥ 97d482f4592fde2322c319f07bc54f3a0d37861c, < a5c453fffb6f2ce75fc10b5d8bc475f1758010bd	Fixed in a5c453fffb6f2ce75fc10b5d8bc475f1758010bd
LinuxLinux	Affected ≥ 97d482f4592fde2322c319f07bc54f3a0d37861c, < 954157679ec34661c2e87e7eb796104a797c32db	Fixed in 954157679ec34661c2e87e7eb796104a797c32db
LinuxLinux	Affected ≥ 97d482f4592fde2322c319f07bc54f3a0d37861c, < 6ce0db97fb37ab8cf8596edca0e3de8618ab009a	Fixed in 6ce0db97fb37ab8cf8596edca0e3de8618ab009a
LinuxLinux	Affected ≥ 97d482f4592fde2322c319f07bc54f3a0d37861c, < 06a4beeeec8f03f0b3e9c78a98f1ae4f0f18cfbd	Fixed in 06a4beeeec8f03f0b3e9c78a98f1ae4f0f18cfbd
LinuxLinux	Affected ≥ 97d482f4592fde2322c319f07bc54f3a0d37861c, < 4b4a3e7ef7bb622237495db9ba4dfd7417d6530e	Fixed in 4b4a3e7ef7bb622237495db9ba4dfd7417d6530e

AI-suggested

A fix is available in multiple Linux kernel commits that reintroduce validation to disallow overlapping input ranges in damon_set_regions(). Users should update to a fixed kernel version containing these commits to resolve the issue. No additional mitigation is indicated.

Description

A vulnerability in the Linux kernel's DAMON subsystem allows overlapping input ranges in damon_set_regions(), which were previously assumed to be sorted and non-overlapping. This can cause unexpected behavior including overlapping monitoring regions, repeated actions, quota inconsistencies, kernel warnings, and potential division by zero errors under certain configurations.

Impact

The vulnerability can cause DAMON monitoring results to be incorrect or inconsistent, with overlapping regions and repeated actions affecting quota calculations. Under debug configurations, it can trigger kernel warnings and, in some cases, cause a division by zero error, potentially leading to kernel instability or crashes. There is no indication of remote code execution or privilege escalation from the data provided.

Summary

The Linux kernel's damon_set_regions() function assumes input memory regions are sorted by address and do not overlap. A recent commit mistakenly removed validation of this assumption, allowing overlapping input ranges. This leads to DAMON behaving unexpectedly, such as overlapping monitoring regions and repeated actions by DAMOS. More critically, negative size regions can be created, triggering WARN_ONCE() if CONFIG_DAMON_DEBUG_SANITY=y is enabled, and potentially causing division by zero errors in damon_merge_two_regions(). The issue was fixed by reintroducing validation that returns an error if input ranges overlap.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 6 Nov 2026, 17:19 UTC

Technical details

References

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