CVE-2024-57947 (GCVE-0-2024-57947)

Vulnerability from cvelistv5 – Published: 2025-01-23 13:54 – Updated: 2025-12-06 21:38
VLAI?
Title
netfilter: nf_set_pipapo: fix initial map fill
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_set_pipapo: fix initial map fill The initial buffer has to be inited to all-ones, but it must restrict it to the size of the first field, not the total field size. After each round in the map search step, the result and the fill map are swapped, so if we have a set where f->bsize of the first element is smaller than m->bsize_max, those one-bits are leaked into future rounds result map. This makes pipapo find an incorrect matching results for sets where first field size is not the largest. Followup patch adds a test case to nft_concat_range.sh selftest script. Thanks to Stefano Brivio for pointing out that we need to zero out the remainder explicitly, only correcting memset() argument isn't enough.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < 77bf0c4ab928ca4c9a99311f4f70ba0c17fecba9 (git)
Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < 957a4d1c4c5849e4515c9fb4db21bf85318103dc (git)
Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < 9625c46ce6fd4f922595a4b32b1de5066d70464f (git)
Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < 69b6a67f7052905e928d75a0c5871de50e686986 (git)
Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < 8058c88ac0df21239daee54b5934d5c80ca9685f (git)
Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < 791a615b7ad2258c560f91852be54b0480837c93 (git)
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    Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.10.247 , ≤ 5.10.* (semver)
Unaffected: 5.15.165 , ≤ 5.15.* (semver)
Unaffected: 6.1.103 , ≤ 6.1.* (semver)
Unaffected: 6.6.44 , ≤ 6.6.* (semver)
Unaffected: 6.10.3 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
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{
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_set_pipapo: fix initial map fill\n\nThe initial buffer has to be inited to all-ones, but it must restrict\nit to the size of the first field, not the total field size.\n\nAfter each round in the map search step, the result and the fill map\nare swapped, so if we have a set where f-\u003ebsize of the first element\nis smaller than m-\u003ebsize_max, those one-bits are leaked into future\nrounds result map.\n\nThis makes pipapo find an incorrect matching results for sets where\nfirst field size is not the largest.\n\nFollowup patch adds a test case to nft_concat_range.sh selftest script.\n\nThanks to Stefano Brivio for pointing out that we need to zero out\nthe remainder explicitly, only correcting memset() argument isn\u0027t enough."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-06T21:38:14.300Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/957a4d1c4c5849e4515c9fb4db21bf85318103dc"
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        {
          "url": "https://git.kernel.org/stable/c/9625c46ce6fd4f922595a4b32b1de5066d70464f"
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          "url": "https://git.kernel.org/stable/c/69b6a67f7052905e928d75a0c5871de50e686986"
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        {
          "url": "https://git.kernel.org/stable/c/791a615b7ad2258c560f91852be54b0480837c93"
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      "title": "netfilter: nf_set_pipapo: fix initial map fill",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-57947",
    "datePublished": "2025-01-23T13:54:20.267Z",
    "dateReserved": "2025-01-19T11:50:08.380Z",
    "dateUpdated": "2025-12-06T21:38:14.300Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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  • 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.
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  • 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.



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