CVE-2024-42131 (GCVE-0-2024-42131)

Vulnerability from cvelistv5 – Published: 2024-07-30 07:46 – Updated: 2026-05-11 20:27
VLAI
Title
mm: avoid overflows in dirty throttling logic
Summary
In the Linux kernel, the following vulnerability has been resolved: mm: avoid overflows in dirty throttling logic The dirty throttling logic is interspersed with assumptions that dirty limits in PAGE_SIZE units fit into 32-bit (so that various multiplications fit into 64-bits). If limits end up being larger, we will hit overflows, possible divisions by 0 etc. Fix these problems by never allowing so large dirty limits as they have dubious practical value anyway. For dirty_bytes / dirty_background_bytes interfaces we can just refuse to set so large limits. For dirty_ratio / dirty_background_ratio it isn't so simple as the dirty limit is computed from the amount of available memory which can change due to memory hotplug etc. So when converting dirty limits from ratios to numbers of pages, we just don't allow the result to exceed UINT_MAX. This is root-only triggerable problem which occurs when the operator sets dirty limits to >16 TB.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:16 UTC
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2da02997e08d3efe8174c7a47696e6f7cbe69ba9 , < 2b2d2b8766db028bd827af34075f221ae9e9efff (git)
Affected: 2da02997e08d3efe8174c7a47696e6f7cbe69ba9 , < 4d3817b64eda07491bdd86a234629fe0764fb42a (git)
Affected: 2da02997e08d3efe8174c7a47696e6f7cbe69ba9 , < 7a49389771ae7666f4dc3426e2a4594bf23ae290 (git)
Affected: 2da02997e08d3efe8174c7a47696e6f7cbe69ba9 , < a25e8536184516b55ef89ab91dd2eea429de28d2 (git)
Affected: 2da02997e08d3efe8174c7a47696e6f7cbe69ba9 , < c83ed422c24f0d4b264f89291d4fabe285f80dbc (git)
Affected: 2da02997e08d3efe8174c7a47696e6f7cbe69ba9 , < bd16a7ee339aef3ee4c90cb23902afb6af379ea0 (git)
Affected: 2da02997e08d3efe8174c7a47696e6f7cbe69ba9 , < 8e0b5e7f2895eccef5c2a0018b589266f90c4805 (git)
Affected: 2da02997e08d3efe8174c7a47696e6f7cbe69ba9 , < 385d838df280eba6c8680f9777bfa0d0bfe7e8b2 (git)
Create a notification for this product.
Linux Linux Affected: 2.6.29
Unaffected: 0 , < 2.6.29 (semver)
Unaffected: 4.19.320 , ≤ 4.19.* (semver)
Unaffected: 5.4.282 , ≤ 5.4.* (semver)
Unaffected: 5.10.222 , ≤ 5.10.* (semver)
Unaffected: 5.15.163 , ≤ 5.15.* (semver)
Unaffected: 6.1.98 , ≤ 6.1.* (semver)
Unaffected: 6.6.39 , ≤ 6.6.* (semver)
Unaffected: 6.9.9 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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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

Author Source Type Date Other

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • 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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.