CVE-2023-52924 (GCVE-0-2023-52924)

Vulnerability from cvelistv5 – Published: 2025-02-05 09:07 – Updated: 2026-05-11 19:35
VLAI
Title
netfilter: nf_tables: don't skip expired elements during walk
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: don't skip expired elements during walk There is an asymmetry between commit/abort and preparation phase if the following conditions are met: 1. set is a verdict map ("1.2.3.4 : jump foo") 2. timeouts are enabled In this case, following sequence is problematic: 1. element E in set S refers to chain C 2. userspace requests removal of set S 3. kernel does a set walk to decrement chain->use count for all elements from preparation phase 4. kernel does another set walk to remove elements from the commit phase (or another walk to do a chain->use increment for all elements from abort phase) If E has already expired in 1), it will be ignored during list walk, so its use count won't have been changed. Then, when set is culled, ->destroy callback will zap the element via nf_tables_set_elem_destroy(), but this function is only safe for elements that have been deactivated earlier from the preparation phase: lack of earlier deactivate removes the element but leaks the chain use count, which results in a WARN splat when the chain gets removed later, plus a leak of the nft_chain structure. Update pipapo_get() not to skip expired elements, otherwise flush command reports bogus ENOENT errors.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9d0982927e79049675cb6c6c04a0ebb3dad5a434 , < 94313a196b44184b5b52c1876da6a537701b425a (git)
Affected: 9d0982927e79049675cb6c6c04a0ebb3dad5a434 , < 1da4874d05da1526b11b82fc7f3c7ac38749ddf8 (git)
Affected: 9d0982927e79049675cb6c6c04a0ebb3dad5a434 , < b15ea4017af82011dd55225ce77cce3d4dfc169c (git)
Affected: 9d0982927e79049675cb6c6c04a0ebb3dad5a434 , < 7c7e658a36f8b1522bd3586d8137e5f93a25ddc5 (git)
Affected: 9d0982927e79049675cb6c6c04a0ebb3dad5a434 , < 59dab3bf0b8fc08eb802721c0532f13dd89209b8 (git)
Affected: 9d0982927e79049675cb6c6c04a0ebb3dad5a434 , < bd156ce9553dcaf2d6ee2c825d1a5a1718e86524 (git)
Affected: 9d0982927e79049675cb6c6c04a0ebb3dad5a434 , < 24138933b97b055d486e8064b4a1721702442a9b (git)
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Linux Linux Affected: 4.1
Unaffected: 0 , < 4.1 (semver)
Unaffected: 4.19.316 , ≤ 4.19.* (semver)
Unaffected: 5.4.262 , ≤ 5.4.* (semver)
Unaffected: 5.10.198 , ≤ 5.10.* (semver)
Unaffected: 5.15.134 , ≤ 5.15.* (semver)
Unaffected: 6.1.56 , ≤ 6.1.* (semver)
Unaffected: 6.4.11 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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Actualice pipapo_get() para no omitir los elementos vencidos, de lo contrario, el comando flush informa errores ENOENT 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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-07-23T14:43:35+00:00",
      "cve": "CVE-2023-52924",
      "id": "CVE-2023-52924",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "912",
      "product_status:known_affected": "66",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: netfilter: nf_tables: don\u0027t skip expired elements during walk",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-52924.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-03T04:37:34Z",
      "cve": "CVE-2023-52924",
      "id": "CVE-2023-52924",
      "initial_release_date": "2025-02-06T04:14:10Z",
      "product_status:known_affected": "344",
      "product_status:known_not_affected": "339",
      "product_status:recommended": "645",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-52924",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-52924.json",
      "version": "88"
    }
  }
}



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Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.