CVE-2024-35960 (GCVE-0-2024-35960)

Vulnerability from cvelistv5 – Published: 2024-05-20 09:41 – Updated: 2026-05-12 11:53
VLAI?
Title
net/mlx5: Properly link new fs rules into the tree
Summary
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Properly link new fs rules into the tree Previously, add_rule_fg would only add newly created rules from the handle into the tree when they had a refcount of 1. On the other hand, create_flow_handle tries hard to find and reference already existing identical rules instead of creating new ones. These two behaviors can result in a situation where create_flow_handle 1) creates a new rule and references it, then 2) in a subsequent step during the same handle creation references it again, resulting in a rule with a refcount of 2 that is not linked into the tree, will have a NULL parent and root and will result in a crash when the flow group is deleted because del_sw_hw_rule, invoked on rule deletion, assumes node->parent is != NULL. This happened in the wild, due to another bug related to incorrect handling of duplicate pkt_reformat ids, which lead to the code in create_flow_handle incorrectly referencing a just-added rule in the same flow handle, resulting in the problem described above. Full details are at [1]. This patch changes add_rule_fg to add new rules without parents into the tree, properly initializing them and avoiding the crash. This makes it more consistent with how rules are added to an FTE in create_flow_handle.
Severity ?
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 74491de937125d0c98c9b9c9208b4105717a3caa , < de0139719cdda82806a47580ca0df06fc85e0bd2 (git)
Affected: 74491de937125d0c98c9b9c9208b4105717a3caa , < 1263b0b26077b1183c3c45a0a2479573a351d423 (git)
Affected: 74491de937125d0c98c9b9c9208b4105717a3caa , < 3d90ca9145f6b97b38d0c2b6b30f6ca6af9c1801 (git)
Affected: 74491de937125d0c98c9b9c9208b4105717a3caa , < 7aaee12b804c5e0374e7b132b6ec2158ff33dd64 (git)
Affected: 74491de937125d0c98c9b9c9208b4105717a3caa , < 2e8dc5cffc844dacfa79f056dea88002312f253f (git)
Affected: 74491de937125d0c98c9b9c9208b4105717a3caa , < 5cf5337ef701830f173b4eec00a4f984adeb57a0 (git)
Affected: 74491de937125d0c98c9b9c9208b4105717a3caa , < adf67a03af39095f05d82050f15813d6f700159d (git)
Affected: 74491de937125d0c98c9b9c9208b4105717a3caa , < 7c6782ad4911cbee874e85630226ed389ff2e453 (git)
Create a notification for this product.
Linux Linux Affected: 4.10
Unaffected: 0 , < 4.10 (semver)
Unaffected: 4.19.313 , ≤ 4.19.* (semver)
Unaffected: 5.4.275 , ≤ 5.4.* (semver)
Unaffected: 5.10.216 , ≤ 5.10.* (semver)
Unaffected: 5.15.156 , ≤ 5.15.* (semver)
Unaffected: 6.1.87 , ≤ 6.1.* (semver)
Unaffected: 6.6.28 , ≤ 6.6.* (semver)
Unaffected: 6.8.7 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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\"unaffected\", \"version\": \"6.6.28\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/ethernet/mellanox/mlx5/core/fs_core.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/de0139719cdda82806a47580ca0df06fc85e0bd2\"}, {\"url\": \"https://git.kernel.org/stable/c/1263b0b26077b1183c3c45a0a2479573a351d423\"}, {\"url\": \"https://git.kernel.org/stable/c/3d90ca9145f6b97b38d0c2b6b30f6ca6af9c1801\"}, {\"url\": \"https://git.kernel.org/stable/c/7aaee12b804c5e0374e7b132b6ec2158ff33dd64\"}, {\"url\": \"https://git.kernel.org/stable/c/2e8dc5cffc844dacfa79f056dea88002312f253f\"}, {\"url\": \"https://git.kernel.org/stable/c/5cf5337ef701830f173b4eec00a4f984adeb57a0\"}, {\"url\": \"https://git.kernel.org/stable/c/adf67a03af39095f05d82050f15813d6f700159d\"}, {\"url\": \"https://git.kernel.org/stable/c/7c6782ad4911cbee874e85630226ed389ff2e453\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/mlx5: Properly link new fs rules into the tree\\n\\nPreviously, add_rule_fg would only add newly created rules from the\\nhandle into the tree when they had a refcount of 1. On the other hand,\\ncreate_flow_handle tries hard to find and reference already existing\\nidentical rules instead of creating new ones.\\n\\nThese two behaviors can result in a situation where create_flow_handle\\n1) creates a new rule and references it, then\\n2) in a subsequent step during the same handle creation references it\\n   again,\\nresulting in a rule with a refcount of 2 that is not linked into the\\ntree, will have a NULL parent and root and will result in a crash when\\nthe flow group is deleted because del_sw_hw_rule, invoked on rule\\ndeletion, assumes node-\u003eparent is != NULL.\\n\\nThis happened in the wild, due to another bug related to incorrect\\nhandling of duplicate pkt_reformat ids, which lead to the code in\\ncreate_flow_handle incorrectly referencing a just-added rule in the same\\nflow handle, resulting in the problem described above. Full details are\\nat [1].\\n\\nThis patch changes add_rule_fg to add new rules without parents into\\nthe tree, properly initializing them and avoiding the crash. This makes\\nit more consistent with how rules are added to an FTE in\\ncreate_flow_handle.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.313\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.275\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.216\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.156\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.87\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.28\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.7\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"4.10\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:09:16.502Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-35960\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T09:09:16.502Z\", \"dateReserved\": \"2024-05-17T13:50:33.137Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-20T09:41:51.900Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Tags
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.