CVE-2026-68165 (GCVE-0-2026-68165)

Vulnerability from cvelistv5 – Published: 2026-08-10 11:59 – Updated: 2026-08-19 16:30
VLAI
Title
mm/damon/core: validate ranges in damon_set_regions()
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/damon/core: validate ranges in damon_set_regions() DAMON core logic assumes zero length regions don't exist. However, a few DAMON API callers including DAMON_SYSFS, DAMON_RECLAIM and DAMON_LRU_SORT allow users to set empty monitoring target regions. This could result in WARN_ONCE() on CONFIG_DAMON_DEBUG_SANITY enabled kernel, and divide-by-zero from damon_merge_two_regions(). For example, the WANR_ONCE() can be triggered like below. # grep DAMON_DEBUG_SANITY /boot/config-$(uname -r) # CONFIG_DAMON_DEBUG_SANITY=y # damo start # cd /sys/kernel/mm/damon/admin/kdamonds/0 # echo 0 > contexts/0/targets/0/regions/0/start # echo 0 > contexts/0/targets/0/regions/0/end # echo commit > state # dmesg [....] [ 73.705780] ------------[ cut here ]------------ [ 73.707552] start 0 >= end 0 [ 73.708452] WARNING: mm/damon/core.c:359 at damon_new_region+0x6e/0x80, CPU#1: kdamond.0/758 [...] All DAMON API callers eventually use damon_set_regions() to setup the regions. Add the validation logic in the function.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 43b0536cb4710e7bb591edfda7e68a1c327a3409 , < 71cf8a3ee1c18cfa8b88cc14bac9c2f43dd29f9b (git)
Affected: 43b0536cb4710e7bb591edfda7e68a1c327a3409 , < b585facbafbb5cf117b37b1c75819ac046646c27 (git)
Affected: 43b0536cb4710e7bb591edfda7e68a1c327a3409 , < c927b73a5694c735314ea10e7c81c07f9bd51ad7 (git)
Affected: 43b0536cb4710e7bb591edfda7e68a1c327a3409 , < 4b6f1d6d5d07855bd1bb9e64922b049062138bfa (git)
Affected: 43b0536cb4710e7bb591edfda7e68a1c327a3409 , < 43aaddd0fa92010a68adeda7744c7cf497a1c8e9 (git)
Affected: 43b0536cb4710e7bb591edfda7e68a1c327a3409 , < 1292c0ecb1caefb8ca064a3639d5673991e8810c (git)
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Linux Linux Affected: 5.16
Unaffected: 0 , < 5.16 (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-11T13:42:09+00:00",
      "cve": "CVE-2026-68165",
      "id": "CVE-2026-68165",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mm/damon/core: validate ranges in damon_set_regions()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68165.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-08-13T16:23:55Z",
      "cve": "CVE-2026-68165",
      "id": "CVE-2026-68165",
      "initial_release_date": "2026-08-13T16:23:55Z",
      "product_status:known_affected": "129",
      "product_status:known_not_affected": "167",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68165",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68165.json",
      "version": "2"
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.