CVE - CVE-2024-41006

CVE-ID
CVE-2024-41006	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: netrom: Fix a memory leak in nr_heartbeat_expiry() syzbot reported a memory leak in nr_create() [0]. Commit 409db27e3a2e ("netrom: Fix use-after-free of a listening socket.") added sock_hold() to the nr_heartbeat_expiry() function, where a) a socket has a SOCK_DESTROY flag or b) a listening socket has a SOCK_DEAD flag. But in the case "a," when the SOCK_DESTROY flag is set, the file descriptor has already been closed and the nr_release() function has been called. So it makes no sense to hold the reference count because no one will call another nr_destroy_socket() and put it as in the case "b." nr_connect nr_establish_data_link nr_start_heartbeat nr_release switch (nr->state) case NR_STATE_3 nr->state = NR_STATE_2 sock_set_flag(sk, SOCK_DESTROY); nr_rx_frame nr_process_rx_frame switch (nr->state) case NR_STATE_2 nr_state2_machine() nr_disconnect() nr_sk(sk)->state = NR_STATE_0 sock_set_flag(sk, SOCK_DEAD) nr_heartbeat_expiry switch (nr->state) case NR_STATE_0 if (sock_flag(sk, SOCK_DESTROY) \|\| (sk->sk_state == TCP_LISTEN && sock_flag(sk, SOCK_DEAD))) sock_hold() // ( !!! ) nr_destroy_socket() To fix the memory leak, let's call sock_hold() only for a listening socket. Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with Syzkaller. [0]: https://syzkaller.appspot.com/bug?extid=d327a1f3b12e1e206c16
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/0b9130247f3b6a1122478471ff0e014ea96bb735 URL:https://git.kernel.org/stable/c/0b9130247f3b6a1122478471ff0e014ea96bb735 MISC:https://git.kernel.org/stable/c/280cf1173726a7059b628c610c71050d5c0b6937 URL:https://git.kernel.org/stable/c/280cf1173726a7059b628c610c71050d5c0b6937 MISC:https://git.kernel.org/stable/c/5391f9db2cab5ef1cb411be1ab7dbec728078fba URL:https://git.kernel.org/stable/c/5391f9db2cab5ef1cb411be1ab7dbec728078fba MISC:https://git.kernel.org/stable/c/a02fd5d775cf9787ee7698c797e20f2fa13d2e2b URL:https://git.kernel.org/stable/c/a02fd5d775cf9787ee7698c797e20f2fa13d2e2b MISC:https://git.kernel.org/stable/c/b6ebe4fed73eedeb73f4540f8edc4871945474c8 URL:https://git.kernel.org/stable/c/b6ebe4fed73eedeb73f4540f8edc4871945474c8 MISC:https://git.kernel.org/stable/c/d377f5a28332954b19e373d36823e59830ab1712 URL:https://git.kernel.org/stable/c/d377f5a28332954b19e373d36823e59830ab1712 MISC:https://git.kernel.org/stable/c/d616876256b38ecf9a1a1c7d674192c5346bc69c URL:https://git.kernel.org/stable/c/d616876256b38ecf9a1a1c7d674192c5346bc69c MISC:https://git.kernel.org/stable/c/e07a9c2a850cdebf625e7a1b8171bd23a8554313 URL:https://git.kernel.org/stable/c/e07a9c2a850cdebf625e7a1b8171bd23a8554313
Assigning CNA
kernel.org
Date Record Created
20240712	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 (20240712)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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