CVE - CVE-2024-56661

CVE-ID
CVE-2024-56661	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: tipc: fix NULL deref in cleanup_bearer() syzbot found [1] that after blamed commit, ub->ubsock->sk was NULL when attempting the atomic_dec() : atomic_dec(&tipc_net(sock_net(ub->ubsock->sk))->wq_count); Fix this by caching the tipc_net pointer. [1] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 0 UID: 0 PID: 5896 Comm: kworker/0:3 Not tainted 6.13.0-rc1-next-20241203-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events cleanup_bearer RIP: 0010:read_pnet include/net/net_namespace.h:387 [inline] RIP: 0010:sock_net include/net/sock.h:655 [inline] RIP: 0010:cleanup_bearer+0x1f7/0x280 net/tipc/udp_media.c:820 Code: 18 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 3c f7 99 f6 48 8b 1b 48 83 c3 30 e8 f0 e4 60 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 1a f7 99 f6 49 83 c7 e8 48 8b 1b RSP: 0018:ffffc9000410fb70 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff88802fe45a00 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc9000410f900 RBP: ffff88807e1f0908 R08: ffffc9000410f907 R09: 1ffff92000821f20 R10: dffffc0000000000 R11: fffff52000821f21 R12: ffff888031d19980 R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff88807e1f0918 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000556ca050b000 CR3: 0000000031c0c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/07b569eda6fe6a1e83be5a587abee12d1303f95e URL:https://git.kernel.org/stable/c/07b569eda6fe6a1e83be5a587abee12d1303f95e MISC:https://git.kernel.org/stable/c/754ec823ee53422361da7958a8c8bf3275426912 URL:https://git.kernel.org/stable/c/754ec823ee53422361da7958a8c8bf3275426912 MISC:https://git.kernel.org/stable/c/89ecda492d0a37fd00aaffc4151f1f44c26d93ac URL:https://git.kernel.org/stable/c/89ecda492d0a37fd00aaffc4151f1f44c26d93ac MISC:https://git.kernel.org/stable/c/a771f349c95d3397636861a0a6462d4a7a7ecb25 URL:https://git.kernel.org/stable/c/a771f349c95d3397636861a0a6462d4a7a7ecb25 MISC:https://git.kernel.org/stable/c/a852c82eda4991e21610837aaa160965be71f5cc URL:https://git.kernel.org/stable/c/a852c82eda4991e21610837aaa160965be71f5cc MISC:https://git.kernel.org/stable/c/b04d86fff66b15c07505d226431f808c15b1703c URL:https://git.kernel.org/stable/c/b04d86fff66b15c07505d226431f808c15b1703c MISC:https://git.kernel.org/stable/c/d1d4dfb189a115734bff81c411bc58d9e348db7d URL:https://git.kernel.org/stable/c/d1d4dfb189a115734bff81c411bc58d9e348db7d
Assigning CNA
kernel.org
Date Record Created
20241227	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241227)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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