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NVD / CVE Program· CNA Linux

CVE-2026-52905: mm/damon/core: disallow non-power of two min_region_sz on damon_start()

MediumCVSS 5.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.11% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 1de2db19a6028abe7d905875922faef5b873de67, 89b6226b6c2a4add3939f361653a47c212d6ab75, 95093e5cb4c5b50a5b1a4b79f2942b62744bd66a.

Low priority for now. Upgrade to Linux Linux 1de2db19a6028abe7d905875922faef5b873de67, 89b6226b6c2a4add3939f361653a47c212d6ab75, 95093e5cb4c5b50a5b1a4b79f2942b62744bd66a or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: mm/damon/core: disallow non-power of two min_region_sz on damon_start() Commit d8f867fa0825 ("mm/damon: add damon_ctx->min_sz_region") introduced a bug that allows unaligned DAMON region address ranges. Commit c80f46ac228b ("mm/damon/core: disallow non-power of two min_region_sz") fixed it, but only for damon_commit_ctx() use case. Still, DAMON sysfs interface can emit non-power of two min_region_sz via damon_start(). Fix the path by adding the is_power_of_2() check on damon_start(). The issue was discovered by sashiko [1].

Published
Jun 9, 2026
Updated
Jul 23, 2026
EPSS
0.1% · 1th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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  • when exploit code appears or is weaponized
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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 6.18affected
    • d8f867fa0825fb3e358457566d7326d8aab2406a and later · before 1de2db19a6028abe7d905875922faef5b873de67affected · git
    • d8f867fa0825fb3e358457566d7326d8aab2406a and later · before 89b6226b6c2a4add3939f361653a47c212d6ab75affected · git
    • d8f867fa0825fb3e358457566d7326d8aab2406a and later · before 95093e5cb4c5b50a5b1a4b79f2942b62744bd66aaffected · git
    • before 6.18not affected · semver
    • 6.18.30 and later · up to and including 6.18.*not affected · semver
    • 7.0.4 and later · up to and including 7.0.*not affected · semver
    • 7.1 and laternot affected · original_commit_for_fix

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel6.18 and later · before 6.18.30
  • linux linux kernel6.19 and later · before 7.0.4

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:14linuxbefore 7.0.4-17.0.4-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-46332Jun 9, 2026 · greybus: gb-beagleplay: bound bootloader receive buffering
    32Monitor
  • ← EarlierCVE-2026-52904Jun 9, 2026 · drm/nouveau: fix nvkm_device leak on aperture removal failure
    22Monitor
  • Later →CVE-2026-52906Jun 9, 2026 · 9p: fix access mode flags being ORed instead of replaced
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux1de2db19a6028abe7d905875922faef5b873de67Vendor (CNA)
Linux Linux89b6226b6c2a4add3939f361653a47c212d6ab75Vendor (CNA)
Linux Linux95093e5cb4c5b50a5b1a4b79f2942b62744bd66aVendor (CNA)
debian:linux7.0.4-1 · Debian:14Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-6386940 days apartwifi: mac80211: limit injected antenna index in ieee80211_parse_tx_radiotap
    30Monitor
  • CVE-2025-39700277 days apartmm/damon/ops-common: ignore migration request to invalid nodes
    22Monitor
  • CVE-2022-50020356 days apartext4: avoid resizing to a partial cluster size
    22Monitor
  • CVE-2024-56716527 days apartnetdevsim: prevent bad user input in nsim_dev_health_break_write()
    22Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-1284 · Improper Validation of Specified Quantity in Input

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records