{"id":"CVE-2024-35960","state":"PUBLISHED","title":"net/mlx5: Properly link new fs rules into the tree","description":"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->parent 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.","publishedAt":"2024-05-20T09:41:51.900Z","updatedAt":"2026-10-15T00:41:43.217Z","severity":{"score":9.1,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"74491de937125d0c98c9b9c9208b4105717a3caa","status":"affected","lessThan":"de0139719cdda82806a47580ca0df06fc85e0bd2","versionType":"git"},{"version":"74491de937125d0c98c9b9c9208b4105717a3caa","status":"affected","lessThan":"1263b0b26077b1183c3c45a0a2479573a351d423","versionType":"git"},{"version":"74491de937125d0c98c9b9c9208b4105717a3caa","status":"affected","lessThan":"3d90ca9145f6b97b38d0c2b6b30f6ca6af9c1801","versionType":"git"},{"version":"74491de937125d0c98c9b9c9208b4105717a3caa","status":"affected","lessThan":"7aaee12b804c5e0374e7b132b6ec2158ff33dd64","versionType":"git"},{"version":"74491de937125d0c98c9b9c9208b4105717a3caa","status":"affected","lessThan":"2e8dc5cffc844dacfa79f056dea88002312f253f","versionType":"git"},{"version":"74491de937125d0c98c9b9c9208b4105717a3caa","status":"affected","lessThan":"5cf5337ef701830f173b4eec00a4f984adeb57a0","versionType":"git"},{"version":"74491de937125d0c98c9b9c9208b4105717a3caa","status":"affected","lessThan":"adf67a03af39095f05d82050f15813d6f700159d","versionType":"git"},{"version":"74491de937125d0c98c9b9c9208b4105717a3caa","status":"affected","lessThan":"7c6782ad4911cbee874e85630226ed389ff2e453","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/fs_core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.10","versionType":"semver"},{"version":"4.19.313","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.275","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.216","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.156","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.87","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.28","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.8.7","status":"unaffected","lessThanOrEqual":"6.8.*","versionType":"semver"},{"version":"6.9","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/fs_core.c"]}],"references":["https://git.kernel.org/stable/c/de0139719cdda82806a47580ca0df06fc85e0bd2","https://git.kernel.org/stable/c/1263b0b26077b1183c3c45a0a2479573a351d423","https://git.kernel.org/stable/c/3d90ca9145f6b97b38d0c2b6b30f6ca6af9c1801","https://git.kernel.org/stable/c/7aaee12b804c5e0374e7b132b6ec2158ff33dd64","https://git.kernel.org/stable/c/2e8dc5cffc844dacfa79f056dea88002312f253f","https://git.kernel.org/stable/c/5cf5337ef701830f173b4eec00a4f984adeb57a0","https://git.kernel.org/stable/c/adf67a03af39095f05d82050f15813d6f700159d","https://git.kernel.org/stable/c/7c6782ad4911cbee874e85630226ed389ff2e453","https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html","https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html","https://cert-portal.siemens.com/productcert/html/ssa-265688.html","https://cert-portal.siemens.com/productcert/html/ssa-613116.html"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:07:30.303Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/35xxx/CVE-2024-35960.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-35960","state":"PUBLISHED","datePublished":"2024-05-20T09:41:51.900Z","dateUpdated":"2026-10-15T00:41:43.217Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-05-17T13:50:33.137Z"},"containers":{"cna":{"title":"net/mlx5: Properly link new fs rules into the tree","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->parent 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 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