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CVE-2024-38596

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, 2.6.12, 6.10, <fca6072e1a7b1e709ada5604b951513b89b4bd0a, <0688d4e499bee3f2749bca27329bd128686230cb, 0, <540bf24fba16b88c1b3b9353927204b4f1074e25, <4d51845d734a4c5d079e56e0916f936a55e15055, <8299e4d778f664b31b67cf4cf3d5409de2ecb92c, <2.6.12, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, <a52fa2addfcccc2c5a0217fd45562605088c018b, <=5.10.*, <=6.6.*, 6.8.12, <=6.9.*, 5.10.219, 4.19.316, <=5.4.*, 6.6.33, <=4.19.*, 5.4.278, 5.15.161, <9aa8773abfa0e954136875b4cbf2df4cf638e8a5, <=6.8.*, 6.1.93, <=*, <de6641d213373fbde9bbdd7c4b552254bc9f82fe, <=5.15.*, 6.9.3, <a4c88072abcaca593cefe70f90e9d3707526e8f9

Description

In the Linux kernel, the following vulnerability has been resolved: af_unix: Fix data races in unix_release_sock/unix_stream_sendmsg A data-race condition has been identified in af_unix. In one data path, the write function unix_release_sock() atomically writes to sk->sk_shutdown using WRITE_ONCE. However, on the reader side, unix_stream_sendmsg() does not read it atomically. Consequently, this issue is causing the following KCSAN splat to occur: BUG: KCSAN: data-race in unix_release_sock / unix_stream_sendmsg write (marked) to 0xffff88867256ddbb of 1 bytes by task 7270 on cpu 28: unix_release_sock (net/unix/af_unix.c:640) unix_release (net/unix/af_unix.c:1050) sock_close (net/socket.c:659 net/socket.c:1421) __fput (fs/file_table.c:422) __fput_sync (fs/file_table.c:508) __se_sys_close (fs/open.c:1559 fs/open.c:1541) __x64_sys_close (fs/open.c:1541) x64_sys_call (arch/x86/entry/syscall_64.c:33) do_syscall_64 (arch/x86/entry/common.c:?) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) read to 0xffff88867256ddbb of 1 bytes by task 989 on cpu 14: unix_stream_sendmsg (net/unix/af_unix.c:2273) __sock_sendmsg (net/socket.c:730 net/socket.c:745) ____sys_sendmsg (net/socket.c:2584) __sys_sendmmsg (net/socket.c:2638 net/socket.c:2724) __x64_sys_sendmmsg (net/socket.c:2753 net/socket.c:2750 net/socket.c:2750) x64_sys_call (arch/x86/entry/syscall_64.c:33) do_syscall_64 (arch/x86/entry/common.c:?) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) value changed: 0x01 -> 0x03 The line numbers are related to commit dd5a440a31fa ("Linux 6.9-rc7"). Commit e1d09c2c2f57 ("af_unix: Fix data races around sk->sk_shutdown.") addressed a comparable issue in the past regarding sk->sk_shutdown. However, it overlooked resolving this particular data path. This patch only offending unix_stream_sendmsg() function, since the other reads seem to be protected by unix_state_lock() as discussed in

Gravité et risque d'exploitation

CVE-2024-38596 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.19 %, ce qui la place devant 7.8 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, 2.6.12, 6.10, <fca6072e1a7b1e709ada5604b951513b89b4bd0a, <0688d4e499bee3f2749bca27329bd128686230cb, 0, <540bf24fba16b88c1b3b9353927204b4f1074e25, <4d51845d734a4c5d079e56e0916f936a55e15055, <8299e4d778f664b31b67cf4cf3d5409de2ecb92c, <2.6.12, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, <a52fa2addfcccc2c5a0217fd45562605088c018b, <=5.10.*, <=6.6.*, 6.8.12, <=6.9.*, 5.10.219, 4.19.316, <=5.4.*, 6.6.33, <=4.19.*, 5.4.278, 5.15.161, <9aa8773abfa0e954136875b4cbf2df4cf638e8a5, <=6.8.*, 6.1.93, <=*, <de6641d213373fbde9bbdd7c4b552254bc9f82fe, <=5.15.*, 6.9.3, <a4c88072abcaca593cefe70f90e9d3707526e8f9) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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