{"id":"CVE-2024-49980","state":"PUBLISHED","title":"vrf: revert \"vrf: Remove unnecessary RCU-bh critical section\"","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvrf: revert \"vrf: Remove unnecessary RCU-bh critical section\"\n\nThis reverts commit 504fc6f4f7f681d2a03aa5f68aad549d90eab853.\n\ndev_queue_xmit_nit is expected to be called with BH disabled.\n__dev_queue_xmit has the following:\n\n        /* Disable soft irqs for various locks below. Also\n         * stops preemption for RCU.\n         */\n        rcu_read_lock_bh();\n\nVRF must follow this invariant. The referenced commit removed this\nprotection. Which triggered a lockdep warning:\n\n\t================================\n\tWARNING: inconsistent lock state\n\t6.11.0 #1 Tainted: G        W\n\t--------------------------------\n\tinconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.\n\tbtserver/134819 [HC0[0]:SC0[0]:HE1:SE1] takes:\n\tffff8882da30c118 (rlock-AF_PACKET){+.?.}-{2:2}, at: tpacket_rcv+0x863/0x3b30\n\t{IN-SOFTIRQ-W} state was registered at:\n\t  lock_acquire+0x19a/0x4f0\n\t  _raw_spin_lock+0x27/0x40\n\t  packet_rcv+0xa33/0x1320\n\t  __netif_receive_skb_core.constprop.0+0xcb0/0x3a90\n\t  __netif_receive_skb_list_core+0x2c9/0x890\n\t  netif_receive_skb_list_internal+0x610/0xcc0\n          [...]\n\n\tother info that might help us debug this:\n\t Possible unsafe locking scenario:\n\n\t       CPU0\n\t       ----\n\t  lock(rlock-AF_PACKET);\n\t  <Interrupt>\n\t    lock(rlock-AF_PACKET);\n\n\t *** DEADLOCK ***\n\n\tCall Trace:\n\t <TASK>\n\t dump_stack_lvl+0x73/0xa0\n\t mark_lock+0x102e/0x16b0\n\t __lock_acquire+0x9ae/0x6170\n\t lock_acquire+0x19a/0x4f0\n\t _raw_spin_lock+0x27/0x40\n\t tpacket_rcv+0x863/0x3b30\n\t dev_queue_xmit_nit+0x709/0xa40\n\t vrf_finish_direct+0x26e/0x340 [vrf]\n\t vrf_l3_out+0x5f4/0xe80 [vrf]\n\t __ip_local_out+0x51e/0x7a0\n          [...]","publishedAt":"2024-10-21T18:02:26.494Z","updatedAt":"2026-05-11T20:43:15.218Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"504fc6f4f7f681d2a03aa5f68aad549d90eab853","status":"affected","lessThan":"718a752bd746b3f4dd62516bb437baf73d548415","versionType":"git"},{"version":"504fc6f4f7f681d2a03aa5f68aad549d90eab853","status":"affected","lessThan":"8c9381b3138246d46536db93ed696832abd70204","versionType":"git"},{"version":"504fc6f4f7f681d2a03aa5f68aad549d90eab853","status":"affected","lessThan":"e61f8c4d179b2ffc0d3b7f821c3734be738643d0","versionType":"git"},{"version":"504fc6f4f7f681d2a03aa5f68aad549d90eab853","status":"affected","lessThan":"b04c4d9eb4f25b950b33218e33b04c94e7445e51","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/vrf.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.55","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.14","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11.3","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/vrf.c"]}],"references":["https://git.kernel.org/stable/c/718a752bd746b3f4dd62516bb437baf73d548415","https://git.kernel.org/stable/c/8c9381b3138246d46536db93ed696832abd70204","https://git.kernel.org/stable/c/e61f8c4d179b2ffc0d3b7f821c3734be738643d0","https://git.kernel.org/stable/c/b04c4d9eb4f25b950b33218e33b04c94e7445e51"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:56.516Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/49xxx/CVE-2024-49980.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-49980","state":"PUBLISHED","datePublished":"2024-10-21T18:02:26.494Z","dateUpdated":"2026-05-11T20:43:15.218Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-10-21T12:17:06.052Z"},"containers":{"cna":{"title":"vrf: revert \"vrf: Remove unnecessary RCU-bh critical section\"","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nvrf: revert \"vrf: Remove unnecessary RCU-bh critical section\"\n\nThis reverts commit 504fc6f4f7f681d2a03aa5f68aad549d90eab853.\n\ndev_queue_xmit_nit is expected to be called with BH disabled.\n__dev_queue_xmit has the following:\n\n        /* Disable soft irqs for various locks below. Also\n         * stops preemption for RCU.\n         */\n        rcu_read_lock_bh();\n\nVRF must follow this invariant. The referenced commit removed this\nprotection. Which triggered a lockdep warning:\n\n\t================================\n\tWARNING: inconsistent lock state\n\t6.11.0 #1 Tainted: G        W\n\t--------------------------------\n\tinconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.\n\tbtserver/134819 [HC0[0]:SC0[0]:HE1:SE1] takes:\n\tffff8882da30c118 (rlock-AF_PACKET){+.?.}-{2:2}, at: tpacket_rcv+0x863/0x3b30\n\t{IN-SOFTIRQ-W} state was registered at:\n\t  lock_acquire+0x19a/0x4f0\n\t  _raw_spin_lock+0x27/0x40\n\t  packet_rcv+0xa33/0x1320\n\t  __netif_receive_skb_core.constprop.0+0xcb0/0x3a90\n\t  __netif_receive_skb_list_core+0x2c9/0x890\n\t  netif_receive_skb_list_internal+0x610/0xcc0\n          [...]\n\n\tother info that might help us debug this:\n\t Possible unsafe locking scenario:\n\n\t       CPU0\n\t       ----\n\t  lock(rlock-AF_PACKET);\n\t  <Interrupt>\n\t    lock(rlock-AF_PACKET);\n\n\t *** DEADLOCK ***\n\n\tCall Trace:\n\t <TASK>\n\t dump_stack_lvl+0x73/0xa0\n\t mark_lock+0x102e/0x16b0\n\t __lock_acquire+0x9ae/0x6170\n\t lock_acquire+0x19a/0x4f0\n\t _raw_spin_lock+0x27/0x40\n\t tpacket_rcv+0x863/0x3b30\n\t dev_queue_xmit_nit+0x709/0xa40\n\t vrf_finish_direct+0x26e/0x340 [vrf]\n\t vrf_l3_out+0x5f4/0xe80 [vrf]\n\t __ip_local_out+0x51e/0x7a0\n          [...]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"504fc6f4f7f681d2a03aa5f68aad549d90eab853","status":"affected","lessThan":"718a752bd746b3f4dd62516bb437baf73d548415","versionType":"git"},{"version":"504fc6f4f7f681d2a03aa5f68aad549d90eab853","status":"affected","lessThan":"8c9381b3138246d46536db93ed696832abd70204","versionType":"git"},{"version":"504fc6f4f7f681d2a03aa5f68aad549d90eab853","status":"affected","lessThan":"e61f8c4d179b2ffc0d3b7f821c3734be738643d0","versionType":"git"},{"version":"504fc6f4f7f681d2a03aa5f68aad549d90eab853","status":"affected","lessThan":"b04c4d9eb4f25b950b33218e33b04c94e7445e51","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/vrf.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.55","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.14","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11.3","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/vrf.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/718a752bd746b3f4dd62516bb437baf73d548415"},{"url":"https://git.kernel.org/stable/c/8c9381b3138246d46536db93ed696832abd70204"},{"url":"https://git.kernel.org/stable/c/e61f8c4d179b2ffc0d3b7f821c3734be738643d0"},{"url":"https://git.kernel.org/stable/c/b04c4d9eb4f25b950b33218e33b04c94e7445e51"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T20:43:15.218Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.6.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.10.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.11.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.12"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-49980","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-10-22T13:32:37.764586Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-10-22T13:38:44.524Z"}}]}}}