CVE - CVE-2024-26731

CVE-ID
CVE-2024-26731	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: bpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready() syzbot reported the following NULL pointer dereference issue [1]: BUG: kernel NULL pointer dereference, address: 0000000000000000 [...] RIP: 0010:0x0 [...] Call Trace: <TASK> sk_psock_verdict_data_ready+0x232/0x340 net/core/skmsg.c:1230 unix_stream_sendmsg+0x9b4/0x1230 net/unix/af_unix.c:2293 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 If sk_psock_verdict_data_ready() and sk_psock_stop_verdict() are called concurrently, psock->saved_data_ready can be NULL, causing the above issue. This patch fixes this issue by calling the appropriate data ready function using the sk_psock_data_ready() helper and protecting it from concurrency with sk->sk_callback_lock.
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/4588b13abcbd561ec67f5b3c1cb2eff690990a54 URL:https://git.kernel.org/stable/c/4588b13abcbd561ec67f5b3c1cb2eff690990a54 MISC:https://git.kernel.org/stable/c/4cd12c6065dfcdeba10f49949bffcf383b3952d8 URL:https://git.kernel.org/stable/c/4cd12c6065dfcdeba10f49949bffcf383b3952d8 MISC:https://git.kernel.org/stable/c/9b099ed46dcaf1403c531ff02c3d7400fa37fa26 URL:https://git.kernel.org/stable/c/9b099ed46dcaf1403c531ff02c3d7400fa37fa26 MISC:https://git.kernel.org/stable/c/d61608a4e394f23e0dca099df9eb8e555453d949 URL:https://git.kernel.org/stable/c/d61608a4e394f23e0dca099df9eb8e555453d949
Assigning CNA
kernel.org
Date Record Created
20240219	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 (20240219)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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