{"id":"CVE-2024-50044","state":"PUBLISHED","title":"Bluetooth: RFCOMM: FIX possible deadlock in rfcomm_sk_state_change","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: RFCOMM: FIX possible deadlock in rfcomm_sk_state_change\n\nrfcomm_sk_state_change attempts to use sock_lock so it must never be\ncalled with it locked but rfcomm_sock_ioctl always attempt to lock it\ncausing the following trace:\n\n======================================================\nWARNING: possible circular locking dependency detected\n6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted\n------------------------------------------------------\nsyz-executor386/5093 is trying to acquire lock:\nffff88807c396258 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1671 [inline]\nffff88807c396258 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: rfcomm_sk_state_change+0x5b/0x310 net/bluetooth/rfcomm/sock.c:73\n\nbut task is already holding lock:\nffff88807badfd28 (&d->lock){+.+.}-{3:3}, at: __rfcomm_dlc_close+0x226/0x6a0 net/bluetooth/rfcomm/core.c:491","publishedAt":"2024-10-21T19:39:42.430Z","updatedAt":"2026-10-15T00:56:43.283Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3241ad820dbb172021e0268b5611031991431626","status":"affected","lessThan":"b77b3fb12fd483cae7c28648903b1d8a6b275f01","versionType":"git"},{"version":"3241ad820dbb172021e0268b5611031991431626","status":"affected","lessThan":"869c6ee62ab8f01bf2419e45326642be5c9b670a","versionType":"git"},{"version":"3241ad820dbb172021e0268b5611031991431626","status":"affected","lessThan":"ef44274dae9b0a90d1a97ce8b242a3b8243a7745","versionType":"git"},{"version":"3241ad820dbb172021e0268b5611031991431626","status":"affected","lessThan":"496b2ab0fd10f205e08909a125485fdc98843dbe","versionType":"git"},{"version":"3241ad820dbb172021e0268b5611031991431626","status":"affected","lessThan":"ced98072d3511b232ae1d3347945f35f30c0e303","versionType":"git"},{"version":"3241ad820dbb172021e0268b5611031991431626","status":"affected","lessThan":"38b2d5a57d125e1c17661b8308c0240c4a43b534","versionType":"git"},{"version":"3241ad820dbb172021e0268b5611031991431626","status":"affected","lessThan":"4cb9807c9b53bf1e5560420d26f319f528b50268","versionType":"git"},{"version":"3241ad820dbb172021e0268b5611031991431626","status":"affected","lessThan":"08d1914293dae38350b8088980e59fbc699a72fe","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/rfcomm/sock.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.27","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.27","versionType":"semver"},{"version":"4.19.323","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.285","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.227","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.168","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.113","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.57","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.11.4","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/rfcomm/sock.c"]}],"references":["https://git.kernel.org/stable/c/b77b3fb12fd483cae7c28648903b1d8a6b275f01","https://git.kernel.org/stable/c/869c6ee62ab8f01bf2419e45326642be5c9b670a","https://git.kernel.org/stable/c/ef44274dae9b0a90d1a97ce8b242a3b8243a7745","https://git.kernel.org/stable/c/496b2ab0fd10f205e08909a125485fdc98843dbe","https://git.kernel.org/stable/c/ced98072d3511b232ae1d3347945f35f30c0e303","https://git.kernel.org/stable/c/38b2d5a57d125e1c17661b8308c0240c4a43b534","https://git.kernel.org/stable/c/4cb9807c9b53bf1e5560420d26f319f528b50268","https://git.kernel.org/stable/c/08d1914293dae38350b8088980e59fbc699a72fe","https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html","https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html","https://cert-portal.siemens.com/productcert/html/ssa-265688.html","https://cert-portal.siemens.com/productcert/html/ssa-355557.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:56.516Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/50xxx/CVE-2024-50044.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-50044","state":"PUBLISHED","datePublished":"2024-10-21T19:39:42.430Z","dateUpdated":"2026-10-15T00:56:43.283Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-10-21T12:17:06.071Z"},"containers":{"cna":{"title":"Bluetooth: RFCOMM: FIX possible deadlock in rfcomm_sk_state_change","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: RFCOMM: FIX possible deadlock in rfcomm_sk_state_change\n\nrfcomm_sk_state_change attempts to use sock_lock so it must never be\ncalled with it locked but rfcomm_sock_ioctl always attempt to lock it\ncausing the following trace:\n\n======================================================\nWARNING: possible circular locking dependency detected\n6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted\n------------------------------------------------------\nsyz-executor386/5093 is trying to acquire lock:\nffff88807c396258 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1671 [inline]\nffff88807c396258 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: rfcomm_sk_state_change+0x5b/0x310 net/bluetooth/rfcomm/sock.c:73\n\nbut task is already holding lock:\nffff88807badfd28 (&d->lock){+.+.}-{3:3}, at: __rfcomm_dlc_close+0x226/0x6a0 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