{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-98014", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:19:56.069Z", "datePublished": "2026-09-25T10:23:37.131Z", "dateUpdated": "2026-10-19T09:12:19.664Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:12:19.664Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: E-Switch, prevent mc_list repopulation during vport disable\n\nIn mlx5_esw_vport_disable(), move esw_apply_vport_rx_mode() ahead\nof esw_vport_change_handle_locked() so vport->allmulti_rule is\nNULL before the change handler observes it.\n\nDuring FW-fatal recovery the disable runs while dev->state ==\nINTERNAL_ERROR. The promisc query inside esw_update_vport_rx_mode()\nfails and returns early, leaving vport->allmulti_rule intact, so\nesw_update_vport_mc_promisc() runs and adds MLX5_ACTION_ADD entries\nto vport->mc_list whose flow rules are then installed in the FDB\nby esw_add_mc_addr(). esw_destroy_legacy_table() tears down the\nFDB with those refs still held, corrupting the sub-tree and\nleaving dangling flow_rule pointers in vport->mc_list.\n\nTwo-stage failure on `echo 1 > /sys/bus/pci/devices//reset`:\n\n refcount_t: underflow; use-after-free.\n tree_put_node+0xef/0x110 [mlx5_core]\n clean_tree+0x44/0xd0 [mlx5_core] (x5)\n mlx5_fs_core_cleanup+0x57/0x1c0 [mlx5_core]\n mlx5_unload+0x65/0xd0 [mlx5_core]\n ... mlx5_health_try_recover\n\n BUG: unable to handle page fault for address: 0000000003000055\n down_write+0x1c/0x60\n mlx5_del_flow_rules+0x33/0x1f0 [mlx5_core]\n esw_del_mc_addr+0x7b/0x170 [mlx5_core]\n esw_apply_vport_addr_list+0x56/0xf0 [mlx5_core]\n esw_vport_change_handle_locked+0x28b/0x310 [mlx5_core]\n mlx5_esw_vport_enable+0x270/0x4a0 [mlx5_core]\n ... mlx5_load ... mlx5_health_try_recover\n\nesw_apply_vport_rx_mode(false, false) clears vport->allmulti_rule\nvia its local state machine even when the FW del fails. With the\nrule NULL the !IS_ERR_OR_NULL(allmulti_rule) gate in the change\nhandler closes, no rules are installed during disable, and the\nreload starts with a clean mc_list." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/mellanox/mlx5/core/eswitch.c" ], "versions": [ { "version": "4df1f2d36bdc9a368650bf14b9097c555e95f71d", "lessThan": "413e04adcc1fd263cf02b1b83b4a0dbdc66bcee9", "status": "affected", "versionType": "git" }, { "version": "63546395a0e6ac264f78f65218086ce6014b4494", "lessThan": "2196f9d3358b00fcb28835a5fde14071f51ecb96", "status": "affected", "versionType": "git" }, { "version": "922f56e9a795d6f3dd72d3428ebdd7ee040fa855", "lessThan": "5a2b87dfceccf9065157a14a599d395c2b6281b8", "status": "affected", "versionType": "git" }, { "version": "922f56e9a795d6f3dd72d3428ebdd7ee040fa855", "lessThan": "69904608e25e8ba58111aadd9210892cf3876201", "status": "affected", "versionType": "git" }, { "version": "922f56e9a795d6f3dd72d3428ebdd7ee040fa855", "lessThan": "72cfcb79026cffb6490f5044153a841d360b0cfc", "status": "affected", "versionType": "git" }, { "version": "922f56e9a795d6f3dd72d3428ebdd7ee040fa855", "lessThan": "668e050429c7ca688cf4e7112f97f0cd269d446b", "status": "affected", "versionType": "git" }, { "version": "922f56e9a795d6f3dd72d3428ebdd7ee040fa855", "lessThan": "c0c6f4ba8a37688f7b4d4044898d88f0450d44c2", "status": "affected", "versionType": "git" }, { "version": "18cead61e437f4c7898acca0a5f3df12f801d97f", "status": "affected", "versionType": "git" }, { "version": "6f5780536181d1d0d09a11a1bc92f22e143447e2", "status": "affected", "versionType": "git" }, { "version": "5.15.105", "lessThan": "5.15.222", "status": "affected", "versionType": "semver" }, { "version": "6.1.22", "lessThan": "6.1.189", "status": "affected", "versionType": "semver" }, { "version": "5.10.177", "lessThan": "5.11", "status": "affected", "versionType": "semver" }, { "version": "6.2.9", "lessThan": "6.3", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/mellanox/mlx5/core/eswitch.c" ], "versions": [ { "version": "6.3", "status": "affected" }, { "version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.7", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.105", "versionEndExcluding": "5.15.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.22", "versionEndExcluding": "6.1.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.12.111" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.18.53" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.2.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.177" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2.9" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/413e04adcc1fd263cf02b1b83b4a0dbdc66bcee9" }, { "url": "https://git.kernel.org/stable/c/2196f9d3358b00fcb28835a5fde14071f51ecb96" }, { "url": "https://git.kernel.org/stable/c/5a2b87dfceccf9065157a14a599d395c2b6281b8" }, { "url": "https://git.kernel.org/stable/c/69904608e25e8ba58111aadd9210892cf3876201" }, { "url": "https://git.kernel.org/stable/c/72cfcb79026cffb6490f5044153a841d360b0cfc" }, { "url": "https://git.kernel.org/stable/c/668e050429c7ca688cf4e7112f97f0cd269d446b" }, { "url": "https://git.kernel.org/stable/c/c0c6f4ba8a37688f7b4d4044898d88f0450d44c2" } ], "title": "net/mlx5: E-Switch, prevent mc_list repopulation during vport disable", "x_generator": { "engine": "bippy-1.2.0" } } } }