{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2024-36938","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-30T15:25:07.071Z","datePublished":"2024-05-30T15:29:26.929Z","dateUpdated":"2025-05-04T09:12:27.522Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T09:12:27.522Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, skmsg: Fix NULL pointer dereference in sk_psock_skb_ingress_enqueue\n\nFix NULL pointer data-races in sk_psock_skb_ingress_enqueue() which\nsyzbot reported [1].\n\n[1]\nBUG: KCSAN: data-race in sk_psock_drop / sk_psock_skb_ingress_enqueue\n\nwrite to 0xffff88814b3278b8 of 8 bytes by task 10724 on cpu 1:\n sk_psock_stop_verdict net/core/skmsg.c:1257 [inline]\n sk_psock_drop+0x13e/0x1f0 net/core/skmsg.c:843\n sk_psock_put include/linux/skmsg.h:459 [inline]\n sock_map_close+0x1a7/0x260 net/core/sock_map.c:1648\n unix_release+0x4b/0x80 net/unix/af_unix.c:1048\n __sock_release net/socket.c:659 [inline]\n sock_close+0x68/0x150 net/socket.c:1421\n __fput+0x2c1/0x660 fs/file_table.c:422\n __fput_sync+0x44/0x60 fs/file_table.c:507\n __do_sys_close fs/open.c:1556 [inline]\n __se_sys_close+0x101/0x1b0 fs/open.c:1541\n __x64_sys_close+0x1f/0x30 fs/open.c:1541\n do_syscall_64+0xd3/0x1d0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nread to 0xffff88814b3278b8 of 8 bytes by task 10713 on cpu 0:\n sk_psock_data_ready include/linux/skmsg.h:464 [inline]\n sk_psock_skb_ingress_enqueue+0x32d/0x390 net/core/skmsg.c:555\n sk_psock_skb_ingress_self+0x185/0x1e0 net/core/skmsg.c:606\n sk_psock_verdict_apply net/core/skmsg.c:1008 [inline]\n sk_psock_verdict_recv+0x3e4/0x4a0 net/core/skmsg.c:1202\n unix_read_skb net/unix/af_unix.c:2546 [inline]\n unix_stream_read_skb+0x9e/0xf0 net/unix/af_unix.c:2682\n sk_psock_verdict_data_ready+0x77/0x220 net/core/skmsg.c:1223\n unix_stream_sendmsg+0x527/0x860 net/unix/af_unix.c:2339\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg+0x140/0x180 net/socket.c:745\n ____sys_sendmsg+0x312/0x410 net/socket.c:2584\n ___sys_sendmsg net/socket.c:2638 [inline]\n __sys_sendmsg+0x1e9/0x280 net/socket.c:2667\n __do_sys_sendmsg net/socket.c:2676 [inline]\n __se_sys_sendmsg net/socket.c:2674 [inline]\n __x64_sys_sendmsg+0x46/0x50 net/socket.c:2674\n do_syscall_64+0xd3/0x1d0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nvalue changed: 0xffffffff83d7feb0 -> 0x0000000000000000\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 0 PID: 10713 Comm: syz-executor.4 Tainted: G        W          6.8.0-syzkaller-08951-gfe46a7dd189e #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024\n\nPrior to this, commit 4cd12c6065df (\"bpf, sockmap: Fix NULL pointer\ndereference in sk_psock_verdict_data_ready()\") fixed one NULL pointer\nsimilarly due to no protection of saved_data_ready. Here is another\ndifferent caller causing the same issue because of the same reason. So\nwe should protect it with sk_callback_lock read lock because the writer\nside in the sk_psock_drop() uses \"write_lock_bh(&sk->sk_callback_lock);\".\n\nTo avoid errors that could happen in future, I move those two pairs of\nlock into the sk_psock_data_ready(), which is suggested by John Fastabend."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/skmsg.h","net/core/skmsg.c"],"versions":[{"version":"604326b41a6fb9b4a78b6179335decee0365cd8c","lessThan":"c0809c128dad4c3413818384eb06a341633db973","status":"affected","versionType":"git"},{"version":"604326b41a6fb9b4a78b6179335decee0365cd8c","lessThan":"5965bc7535fb87510b724e5465ccc1a1cf00916d","status":"affected","versionType":"git"},{"version":"604326b41a6fb9b4a78b6179335decee0365cd8c","lessThan":"39dc9e1442385d6e9be0b6491ee488dddd55ae27","status":"affected","versionType":"git"},{"version":"604326b41a6fb9b4a78b6179335decee0365cd8c","lessThan":"b397a0ab8582c533ec0c6b732392f141fc364f87","status":"affected","versionType":"git"},{"version":"604326b41a6fb9b4a78b6179335decee0365cd8c","lessThan":"772d5729b5ff0df0d37b32db600ce635b2172f80","status":"affected","versionType":"git"},{"version":"604326b41a6fb9b4a78b6179335decee0365cd8c","lessThan":"6648e613226e18897231ab5e42ffc29e63fa3365","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/skmsg.h","net/core/skmsg.c"],"versions":[{"version":"4.20","status":"affected"},{"version":"0","lessThan":"4.20","status":"unaffected","versionType":"semver"},{"version":"5.10.223","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.159","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.91","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.31","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.8.10","lessThanOrEqual":"6.8.*","status":"unaffected","versionType":"semver"},{"version":"6.9","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.10.223"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.15.159"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.1.91"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.6.31"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.8.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.9"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c0809c128dad4c3413818384eb06a341633db973"},{"url":"https://git.kernel.org/stable/c/5965bc7535fb87510b724e5465ccc1a1cf00916d"},{"url":"https://git.kernel.org/stable/c/39dc9e1442385d6e9be0b6491ee488dddd55ae27"},{"url":"https://git.kernel.org/stable/c/b397a0ab8582c533ec0c6b732392f141fc364f87"},{"url":"https://git.kernel.org/stable/c/772d5729b5ff0df0d37b32db600ce635b2172f80"},{"url":"https://git.kernel.org/stable/c/6648e613226e18897231ab5e42ffc29e63fa3365"}],"title":"bpf, skmsg: Fix NULL pointer dereference in sk_psock_skb_ingress_enqueue","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-36938","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-06-04T15:38:33.489892Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-06-04T17:48:04.434Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T03:43:50.528Z"},"title":"CVE Program 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