{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-50047","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-10-21T12:17:06.071Z","datePublished":"2024-10-21T19:39:44.430Z","dateUpdated":"2026-05-11T20:44:28.155Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T20:44:28.155Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix UAF in async decryption\n\nDoing an async decryption (large read) crashes with a\nslab-use-after-free way down in the crypto API.\n\nReproducer:\n    # mount.cifs -o ...,seal,esize=1 //srv/share /mnt\n    # dd if=/mnt/largefile of=/dev/null\n    ...\n    [  194.196391] ==================================================================\n    [  194.196844] BUG: KASAN: slab-use-after-free in gf128mul_4k_lle+0xc1/0x110\n    [  194.197269] Read of size 8 at addr ffff888112bd0448 by task kworker/u77:2/899\n    [  194.197707]\n    [  194.197818] CPU: 12 UID: 0 PID: 899 Comm: kworker/u77:2 Not tainted 6.11.0-lku-00028-gfca3ca14a17a-dirty #43\n    [  194.198400] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.2-3-gd478f380-prebuilt.qemu.org 04/01/2014\n    [  194.199046] Workqueue: smb3decryptd smb2_decrypt_offload [cifs]\n    [  194.200032] Call Trace:\n    [  194.200191]  <TASK>\n    [  194.200327]  dump_stack_lvl+0x4e/0x70\n    [  194.200558]  ? gf128mul_4k_lle+0xc1/0x110\n    [  194.200809]  print_report+0x174/0x505\n    [  194.201040]  ? __pfx__raw_spin_lock_irqsave+0x10/0x10\n    [  194.201352]  ? srso_return_thunk+0x5/0x5f\n    [  194.201604]  ? __virt_addr_valid+0xdf/0x1c0\n    [  194.201868]  ? gf128mul_4k_lle+0xc1/0x110\n    [  194.202128]  kasan_report+0xc8/0x150\n    [  194.202361]  ? gf128mul_4k_lle+0xc1/0x110\n    [  194.202616]  gf128mul_4k_lle+0xc1/0x110\n    [  194.202863]  ghash_update+0x184/0x210\n    [  194.203103]  shash_ahash_update+0x184/0x2a0\n    [  194.203377]  ? __pfx_shash_ahash_update+0x10/0x10\n    [  194.203651]  ? srso_return_thunk+0x5/0x5f\n    [  194.203877]  ? crypto_gcm_init_common+0x1ba/0x340\n    [  194.204142]  gcm_hash_assoc_remain_continue+0x10a/0x140\n    [  194.204434]  crypt_message+0xec1/0x10a0 [cifs]\n    [  194.206489]  ? __pfx_crypt_message+0x10/0x10 [cifs]\n    [  194.208507]  ? srso_return_thunk+0x5/0x5f\n    [  194.209205]  ? srso_return_thunk+0x5/0x5f\n    [  194.209925]  ? srso_return_thunk+0x5/0x5f\n    [  194.210443]  ? srso_return_thunk+0x5/0x5f\n    [  194.211037]  decrypt_raw_data+0x15f/0x250 [cifs]\n    [  194.212906]  ? __pfx_decrypt_raw_data+0x10/0x10 [cifs]\n    [  194.214670]  ? srso_return_thunk+0x5/0x5f\n    [  194.215193]  smb2_decrypt_offload+0x12a/0x6c0 [cifs]\n\nThis is because TFM is being used in parallel.\n\nFix this by allocating a new AEAD TFM for async decryption, but keep\nthe existing one for synchronous READ cases (similar to what is done\nin smb3_calc_signature()).\n\nAlso remove the calls to aead_request_set_callback() and\ncrypto_wait_req() since it's always going to be a synchronous operation."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/client/smb2ops.c","fs/smb/client/smb2pdu.c"],"versions":[{"version":"35cf94a397280b9e27576ac1480f631bdd3e7b70","lessThan":"8f14a476abba13144df5434871a7225fd29af633","status":"affected","versionType":"git"},{"version":"35cf94a397280b9e27576ac1480f631bdd3e7b70","lessThan":"ef51c0d544b1518b35364480317ab6d3468f205d","status":"affected","versionType":"git"},{"version":"35cf94a397280b9e27576ac1480f631bdd3e7b70","lessThan":"bce966530fd5542bbb422cb45ecb775f7a1a6bc3","status":"affected","versionType":"git"},{"version":"35cf94a397280b9e27576ac1480f631bdd3e7b70","lessThan":"0809fb86ad13b29e1d6d491364fc7ea4fb545995","status":"affected","versionType":"git"},{"version":"35cf94a397280b9e27576ac1480f631bdd3e7b70","lessThan":"538c26d9bf70c90edc460d18c81008a4e555925a","status":"affected","versionType":"git"},{"version":"35cf94a397280b9e27576ac1480f631bdd3e7b70","lessThan":"b0abcd65ec545701b8793e12bc27dc98042b151a","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/client/smb2ops.c","fs/smb/client/smb2pdu.c"],"versions":[{"version":"5.4","status":"affected"},{"version":"0","lessThan":"5.4","status":"unaffected","versionType":"semver"},{"version":"5.10.237","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.181","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.128","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.57","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.11.4","lessThanOrEqual":"6.11.*","status":"unaffected","versionType":"semver"},{"version":"6.12","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":"5.4","versionEndExcluding":"5.10.237"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.15.181"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.1.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.6.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.11.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.12"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/8f14a476abba13144df5434871a7225fd29af633"},{"url":"https://git.kernel.org/stable/c/ef51c0d544b1518b35364480317ab6d3468f205d"},{"url":"https://git.kernel.org/stable/c/bce966530fd5542bbb422cb45ecb775f7a1a6bc3"},{"url":"https://git.kernel.org/stable/c/0809fb86ad13b29e1d6d491364fc7ea4fb545995"},{"url":"https://git.kernel.org/stable/c/538c26d9bf70c90edc460d18c81008a4e555925a"},{"url":"https://git.kernel.org/stable/c/b0abcd65ec545701b8793e12bc27dc98042b151a"}],"title":"smb: client: fix UAF in async decryption","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-50047","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-10-22T13:23:59.456851Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-10-22T13:28:43.459Z"}},{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T20:43:16.334Z"}}]}}