{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80739", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.789Z", "datePublished": "2026-09-03T08:21:53.739Z", "dateUpdated": "2026-09-03T08:21:53.739Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-03T08:21:53.739Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: TC, Check if flow is PEER before acquiring devcom lock\n\nIn case __mlx5e_add_fdb_flow() fails in lower levels, the flow is\ndeleted via mlx5e_tc_del_flow(), and mlx5e_tc_del_flow() is acquiring\nESW devcom lock without condition. In addition, in case of peer_flow,\n__mlx5e_add_fdb_flow() is called while holding ESW devcom comp lock.\nThis results in an AA deadlock.\n\nTo fix this, introduce a new PEER flag that is set on flows created as\npeer flows (the duplicate flows on peer devices), and check it in\nmlx5e_tc_del_flow() before acquiring ESW devcom lock.\n\nLockdep splat:\n============================================\nWARNING: possible recursive locking detected\n============================================\n Possible unsafe locking scenario:\n CPU0\n ----\n lock(&comp->lock_key#2);\n lock(&comp->lock_key#2);\n *** DEADLOCK ***\nCall Trace:\n <TASK>\n dump_stack_lvl+0x69/0xa0\n print_deadlock_bug.cold+0xbd/0xca\n __lock_acquire+0x1671/0x2ec0\n lock_acquire+0x10e/0x2e0\n down_read+0x95/0x430\n mlx5_devcom_for_each_peer_begin+0x4e/0xe0 [mlx5_core]\n mlx5e_tc_del_flow+0x11d/0xa70 [mlx5_core]\n mlx5e_flow_put+0x99/0x100 [mlx5_core]\n __mlx5e_add_fdb_flow+0x409/0xf00 [mlx5_core]\n mlx5e_configure_flower+0x2a86/0x4100 [mlx5_core]\n mlx5e_rep_setup_tc_cls_flower+0x12f/0x1b0 [mlx5_core]\n mlx5e_rep_setup_tc_cb+0x153/0x750 [mlx5_core]\n tc_setup_cb_add+0x1dc/0x470\n fl_change+0x2f4d/0x626d [cls_flower]\n tc_new_tfilter+0x79b/0x2310\n rtnetlink_rcv_msg+0x778/0xad0\n do_syscall_64+0x70/0x960\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n </TASK>"}], "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/en/tc_priv.h", "drivers/net/ethernet/mellanox/mlx5/core/en_tc.c"], "versions": [{"version": "04de7dda7394fa9c2b0fc9cec65661d9b4f0d04d", "lessThan": "607adbda01053abf5f93e322fe39325da8828cb8", "status": "affected", "versionType": "git"}, {"version": "04de7dda7394fa9c2b0fc9cec65661d9b4f0d04d", "lessThan": "585df8643081e6f616579bc52cd49ac823a57c82", "status": "affected", "versionType": "git"}, {"version": "04de7dda7394fa9c2b0fc9cec65661d9b4f0d04d", "lessThan": "ff9e7d5e3500be389ce7a0e46db3a77149830bc9", "status": "affected", "versionType": "git"}, {"version": "04de7dda7394fa9c2b0fc9cec65661d9b4f0d04d", "lessThan": "7165fe321c61ec138850c02f030f274797761f5f", "status": "affected", "versionType": "git"}, {"version": "04de7dda7394fa9c2b0fc9cec65661d9b4f0d04d", "lessThan": "6ddfba2ea98db21b001e0e5c472499156224650c", "status": "affected", "versionType": "git"}]}, {"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/en/tc_priv.h", "drivers/net/ethernet/mellanox/mlx5/core/en_tc.c"], "versions": [{"version": "5.0", "status": "affected"}, {"version": "0", "lessThan": "5.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.152", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.104", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.45", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.9", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "5.0", "versionEndExcluding": "6.6.152"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.12.104"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.18.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.1.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/607adbda01053abf5f93e322fe39325da8828cb8"}, {"url": "https://git.kernel.org/stable/c/585df8643081e6f616579bc52cd49ac823a57c82"}, {"url": "https://git.kernel.org/stable/c/ff9e7d5e3500be389ce7a0e46db3a77149830bc9"}, {"url": "https://git.kernel.org/stable/c/7165fe321c61ec138850c02f030f274797761f5f"}, {"url": "https://git.kernel.org/stable/c/6ddfba2ea98db21b001e0e5c472499156224650c"}], "title": "net/mlx5e: TC, Check if flow is PEER before acquiring devcom lock", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[04de7dda7394fa9c2b0fc9cec65661d9b4f0d04d,607adbda01053abf5f93e322fe39325da8828cb8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[04de7dda7394fa9c2b0fc9cec65661d9b4f0d04d,585df8643081e6f616579bc52cd49ac823a57c82)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[04de7dda7394fa9c2b0fc9cec65661d9b4f0d04d,ff9e7d5e3500be389ce7a0e46db3a77149830bc9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[04de7dda7394fa9c2b0fc9cec65661d9b4f0d04d,7165fe321c61ec138850c02f030f274797761f5f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[04de7dda7394fa9c2b0fc9cec65661d9b4f0d04d,6ddfba2ea98db21b001e0e5c472499156224650c)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.152,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.104,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.45,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.9,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-03T12:15:03.577776+00:00", "updated": "2026-09-03T12:15:03.577811+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}