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CVE PROGRAM SOURCE RECORDUnscored

CVE-2024-41006

netrom: Fix a memory leak in nr_heartbeat_expiry()

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Status
Published
Published
Updated
Assigning organization
Linux

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

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • a31caf5779ace8fa98b0d454133808e082ee7a1b to < d616876256b38ecf9a1a1c7d674192c5346bc69caffected
  • fe9b9e621cebe6b7e83f7e954c70f8bb430520e5 to < e07a9c2a850cdebf625e7a1b8171bd23a8554313affected
  • 7de16d75b20ab13b75a7291f449a1b00090edfea to < 5391f9db2cab5ef1cb411be1ab7dbec728078fbaaffected
  • d2d3ab1b1de3302de2c85769121fd4f890e47ceb to < 280cf1173726a7059b628c610c71050d5c0b6937affected
  • 51e394c6f81adbfe7c34d15f58b3d4d44f144acf to < a02fd5d775cf9787ee7698c797e20f2fa13d2e2baffected
  • 409db27e3a2eb5e8ef7226ca33be33361b3ed1c9 to < b6ebe4fed73eedeb73f4540f8edc4871945474c8affected
  • 409db27e3a2eb5e8ef7226ca33be33361b3ed1c9 to < d377f5a28332954b19e373d36823e59830ab1712affected
  • 409db27e3a2eb5e8ef7226ca33be33361b3ed1c9 to < 0b9130247f3b6a1122478471ff0e014ea96bb735affected
  • e666990abb2e42dd4ba979b4706280a3664cfae7affected
  • 4.19.272 to < 4.19.317affected
  • 5.4.231 to < 5.4.279affected
  • 5.10.166 to < 5.10.221affected
  • 5.15.91 to < 5.15.162affected
  • 6.1.9 to < 6.1.96affected
  • 4.14.305 to < 4.15affected

Linux Linux

Default version status: affected

  • 6.2affected
  • 0 to < 6.2unaffected
  • 4.19.317 to ≤ 4.19.*unaffected
  • 5.4.279 to ≤ 5.4.*unaffected
  • 5.10.221 to ≤ 5.10.*unaffected
  • 5.15.162 to ≤ 5.15.*unaffected
  • 6.1.96 to ≤ 6.1.*unaffected
  • 6.6.36 to ≤ 6.6.*unaffected
  • 6.9.7 to ≤ 6.9.*unaffected
  • 6.10 to ≤ *unaffected

References