{"vulnerability": "CVE-2024-49980", "sightings": [{"uuid": "cdb181e2-4cca-4a49-801a-a4312cd73a81", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2024-49980", "type": "seen", "source": "https://t.me/cvedetector/8524", "content": "{\n  \"Source\": \"CVE FEED\",\n  \"Title\": \"CVE-2024-49980 - \"vrf Linux Kernel Deadlock Vulnerability\"\", \n  \"Content\": \"CVE ID : CVE-2024-49980 \nPublished : Oct. 21, 2024, 6:15 p.m. | 44\u00a0minutes ago \nDescription : 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 ================================  \n WARNING: inconsistent lock state  \n 6.11.0 #1 Tainted: G        W  \n --------------------------------  \n inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.  \n btserver/134819 [HC0[0]:SC0[0]:HE1:SE1] takes:  \n ffff8882da30c118 (rlock-AF_PACKET){+.?.}-{2:2}, at: tpacket_rcv+0x863/0x3b30  \n {IN-SOFTIRQ-W} state was registered at:  \n   lock_acquire+0x19a/0x4f0  \n   _raw_spin_lock+0x27/0x40  \n   packet_rcv+0xa33/0x1320  \n   __netif_receive_skb_core.constprop.0+0xcb0/0x3a90  \n   __netif_receive_skb_list_core+0x2c9/0x890  \n   netif_receive_skb_list_internal+0x610/0xcc0  \n          [...]  \n  \n other info that might help us debug this:  \n  Possible unsafe locking scenario:  \n  \n        CPU0  \n        ----  \n   lock(rlock-AF_PACKET);  \n     \n     lock(rlock-AF_PACKET);  \n  \n  *** DEADLOCK ***  \n  \n Call Trace:  \n    \n  dump_stack_lvl+0x73/0xa0  \n  mark_lock+0x102e/0x16b0  \n  __lock_acquire+0x9ae/0x6170  \n  lock_acquire+0x19a/0x4f0  \n  _raw_spin_lock+0x27/0x40  \n  tpacket_rcv+0x863/0x3b30  \n  dev_queue_xmit_nit+0x709/0xa40  \n  vrf_finish_direct+0x26e/0x340 [vrf]  \n  vrf_l3_out+0x5f4/0xe80 [vrf]  \n  __ip_local_out+0x51e/0x7a0  \n          [...] \nSeverity: 0.0 | NA \nVisit the link for more details, such as CVSS details, affected products, timeline, and more...\",\n  \"Detection Date\": \"21 Oct 2024\",\n  \"Type\": \"Vulnerability\"\n}\n\ud83d\udd39 t.me/cvedetector \ud83d\udd39", "creation_timestamp": "2024-10-21T21:02:16.000000Z"}]}