NULL Pointer Dereference Affecting kernel-coco-devel package, versions <6.4.0-15061.12.coco15sp6.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about NULL Pointer Dereference vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-SLES156-KERNELCOCODEVEL-8677880
- published30 Jan 2025
- disclosed29 Jan 2025
Introduced: 29 Jan 2025
NewCVE-2024-56661 (opens in a new tab)How to fix?
Upgrade SLES:15.6 kernel-coco-devel to version 6.4.0-15061.12.coco15sp6.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-coco-devel package and not the kernel-coco-devel package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
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
- https://www.suse.com/security/cve/CVE-2024-56661.html
- https://bugzilla.suse.com/1234931
- https://git.kernel.org/stable/c/07b569eda6fe6a1e83be5a587abee12d1303f95e
- https://git.kernel.org/stable/c/754ec823ee53422361da7958a8c8bf3275426912
- https://git.kernel.org/stable/c/89ecda492d0a37fd00aaffc4151f1f44c26d93ac
- https://git.kernel.org/stable/c/a771f349c95d3397636861a0a6462d4a7a7ecb25
- https://git.kernel.org/stable/c/a852c82eda4991e21610837aaa160965be71f5cc
- https://git.kernel.org/stable/c/b04d86fff66b15c07505d226431f808c15b1703c
- https://git.kernel.org/stable/c/d1d4dfb189a115734bff81c411bc58d9e348db7d