CVE-2024-50047 (GCVE-0-2024-50047)

Vulnerability from cvelistv5 – Published: 2024-10-21 19:39 – Updated: 2026-05-11 20:44
VLAI
Title
smb: client: fix UAF in async decryption
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix UAF in async decryption Doing an async decryption (large read) crashes with a slab-use-after-free way down in the crypto API. Reproducer: # mount.cifs -o ...,seal,esize=1 //srv/share /mnt # dd if=/mnt/largefile of=/dev/null ... [ 194.196391] ================================================================== [ 194.196844] BUG: KASAN: slab-use-after-free in gf128mul_4k_lle+0xc1/0x110 [ 194.197269] Read of size 8 at addr ffff888112bd0448 by task kworker/u77:2/899 [ 194.197707] [ 194.197818] CPU: 12 UID: 0 PID: 899 Comm: kworker/u77:2 Not tainted 6.11.0-lku-00028-gfca3ca14a17a-dirty #43 [ 194.198400] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.2-3-gd478f380-prebuilt.qemu.org 04/01/2014 [ 194.199046] Workqueue: smb3decryptd smb2_decrypt_offload [cifs] [ 194.200032] Call Trace: [ 194.200191] <TASK> [ 194.200327] dump_stack_lvl+0x4e/0x70 [ 194.200558] ? gf128mul_4k_lle+0xc1/0x110 [ 194.200809] print_report+0x174/0x505 [ 194.201040] ? __pfx__raw_spin_lock_irqsave+0x10/0x10 [ 194.201352] ? srso_return_thunk+0x5/0x5f [ 194.201604] ? __virt_addr_valid+0xdf/0x1c0 [ 194.201868] ? gf128mul_4k_lle+0xc1/0x110 [ 194.202128] kasan_report+0xc8/0x150 [ 194.202361] ? gf128mul_4k_lle+0xc1/0x110 [ 194.202616] gf128mul_4k_lle+0xc1/0x110 [ 194.202863] ghash_update+0x184/0x210 [ 194.203103] shash_ahash_update+0x184/0x2a0 [ 194.203377] ? __pfx_shash_ahash_update+0x10/0x10 [ 194.203651] ? srso_return_thunk+0x5/0x5f [ 194.203877] ? crypto_gcm_init_common+0x1ba/0x340 [ 194.204142] gcm_hash_assoc_remain_continue+0x10a/0x140 [ 194.204434] crypt_message+0xec1/0x10a0 [cifs] [ 194.206489] ? __pfx_crypt_message+0x10/0x10 [cifs] [ 194.208507] ? srso_return_thunk+0x5/0x5f [ 194.209205] ? srso_return_thunk+0x5/0x5f [ 194.209925] ? srso_return_thunk+0x5/0x5f [ 194.210443] ? srso_return_thunk+0x5/0x5f [ 194.211037] decrypt_raw_data+0x15f/0x250 [cifs] [ 194.212906] ? __pfx_decrypt_raw_data+0x10/0x10 [cifs] [ 194.214670] ? srso_return_thunk+0x5/0x5f [ 194.215193] smb2_decrypt_offload+0x12a/0x6c0 [cifs] This is because TFM is being used in parallel. Fix this by allocating a new AEAD TFM for async decryption, but keep the existing one for synchronous READ cases (similar to what is done in smb3_calc_signature()). Also remove the calls to aead_request_set_callback() and crypto_wait_req() since it's always going to be a synchronous operation.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 35cf94a397280b9e27576ac1480f631bdd3e7b70 , < 8f14a476abba13144df5434871a7225fd29af633 (git)
Affected: 35cf94a397280b9e27576ac1480f631bdd3e7b70 , < ef51c0d544b1518b35364480317ab6d3468f205d (git)
Affected: 35cf94a397280b9e27576ac1480f631bdd3e7b70 , < bce966530fd5542bbb422cb45ecb775f7a1a6bc3 (git)
Affected: 35cf94a397280b9e27576ac1480f631bdd3e7b70 , < 0809fb86ad13b29e1d6d491364fc7ea4fb545995 (git)
Affected: 35cf94a397280b9e27576ac1480f631bdd3e7b70 , < 538c26d9bf70c90edc460d18c81008a4e555925a (git)
Affected: 35cf94a397280b9e27576ac1480f631bdd3e7b70 , < b0abcd65ec545701b8793e12bc27dc98042b151a (git)
Create a notification for this product.
Linux Linux Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.10.237 , ≤ 5.10.* (semver)
Unaffected: 5.15.181 , ≤ 5.15.* (semver)
Unaffected: 6.1.128 , ≤ 6.1.* (semver)
Unaffected: 6.6.57 , ≤ 6.6.* (semver)
Unaffected: 6.11.4 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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          "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]  \u003cTASK\u003e\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\u0027s always going to be a synchronous operation."
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      "title": "smb: client: fix UAF in async decryption",
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    "dateUpdated": "2026-05-11T20:44:28.155Z",
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      "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]  \u003cTASK\u003e\\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\u0027s always going to be a synchronous operation.\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: cliente: corregir UAF en descifrado asincr\\u00f3nico Al realizar un descifrado asincr\\u00f3nico (lectura grande), se produce un bloqueo con un m\\u00e9todo slab-use-after-free en la API de cifrado. Reproductor: # mount.cifs -o ...,seal,esize=1 //srv/share /mnt # dd if=/mnt/largefile of=/dev/null ... [ 194.196391] ===================================================================== [ 194.196844] ERROR: KASAN: slab-use-after-free en gf128mul_4k_lle+0xc1/0x110 [ 194.197269] Lectura de tama\\u00f1o 8 en la direcci\\u00f3n ffff888112bd0448 por la tarea kworker/u77:2/899 [ 194.197707] [ 194.197818] CPU: 12 UID: 0 PID: 899 Comm: kworker/u77:2 No contaminado 6.11.0-lku-00028-gfca3ca14a17a-dirty #43 [ 194.198400] Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.2-3-gd478f380-prebuilt.qemu.org 04/01/2014 [ 194.199046] Cola de trabajo: smb3decryptd smb2_decrypt_offload [cifs] [ 194.200032] Seguimiento de llamadas: [ 194.200191]  [ [194.200327] dump_stack_lvl+0x4e/0x70 [194.200558] ? gf128mul_4k_lle+0xc1/0x110 [194.200809] print_report+0x174/0x505 [194.201040] ? __pfx__raw_spin_lock_irqsave+0x10/0x10 [194.201352] ? srso_return_thunk+0x5/0x5f [194.201604] ? __virt_addr_valid+0xdf/0x1c0 [194.201868] ? gf128mul_4k_lle+0xc1/0x110 [ 194.202128] kasan_report+0xc8/0x150 [ 194.202361] ? gf128mul_4k_lle+0xc1/0x110 [ 194.202616] gf128mul_4k_lle+0xc1/0x110 [ 194.202863] ghash_update+0x184/0x210 [ 194.203103] shash_ahash_update+0x184/0x2a0 [ 194.203377] ? __pfx_shash_ahash_update+0x10/0x10 [ 194.203651] ? srso_return_thunk+0x5/0x5f [ 194.203877] ? crypto_gcm_init_common+0x1ba/0x340 [ 194.204142] gcm_hash_assoc_remain_continue+0x10a/0x140 [ 194.204434] crypt_message+0xec1/0x10a0 [cifs] [ 194.206489] ? __pfx_crypt_message+0x10/0x10 [cifs] [ 194.208507] ? srso_return_thunk+0x5/0x5f [ 194.209205] ? srso_return_thunk+0x5/0x5f [ 194.209925] ? srso_return_thunk+0x5/0x5f [ 194.210443] ? srso_return_thunk+0x5/0x5f [ 194.211037] decrypt_raw_data+0x15f/0x250 [cifs] [ 194.212906] ? __pfx_decrypt_raw_data+0x10/0x10 [cifs] [ 194.214670] ? srso_return_thunk+0x5/0x5f [ 194.215193] smb2_decrypt_offload+0x12a/0x6c0 [cifs] Esto se debe a que TFM se est\\u00e1 utilizando en paralelo. Solucione esto asignando un nuevo TFM AEAD para el descifrado asincr\\u00f3nico, pero conserve el existente para los casos de LECTURA sincr\\u00f3nica (similar a lo que se hace en smb3_calc_signature()). Tambi\\u00e9n elimine las llamadas a aead_request_set_callback() y crypto_wait_req() ya que siempre ser\\u00e1 una operaci\\u00f3n sincr\\u00f3nica.\"}]",
      "id": "CVE-2024-50047",
      "lastModified": "2024-10-23T22:16:21.783",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 5.9}]}",
      "published": "2024-10-21T20:15:17.507",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/0809fb86ad13b29e1d6d491364fc7ea4fb545995\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/538c26d9bf70c90edc460d18c81008a4e555925a\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/b0abcd65ec545701b8793e12bc27dc98042b151a\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Analyzed",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-416\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-50047\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-10-21T20:15:17.507\",\"lastModified\":\"2025-11-03T21:16:55.063\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"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]  \u003cTASK\u003e\\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\u0027s always going to be a synchronous operation.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: cliente: corregir UAF en descifrado asincr\u00f3nico Al realizar un descifrado asincr\u00f3nico (lectura grande), se produce un bloqueo con un m\u00e9todo slab-use-after-free en la API de cifrado. Reproductor: # mount.cifs -o ...,seal,esize=1 //srv/share /mnt # dd if=/mnt/largefile of=/dev/null ... [ 194.196391] ===================================================================== [ 194.196844] ERROR: KASAN: slab-use-after-free en gf128mul_4k_lle+0xc1/0x110 [ 194.197269] Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff888112bd0448 por la tarea kworker/u77:2/899 [ 194.197707] [ 194.197818] CPU: 12 UID: 0 PID: 899 Comm: kworker/u77:2 No contaminado 6.11.0-lku-00028-gfca3ca14a17a-dirty #43 [ 194.198400] Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.2-3-gd478f380-prebuilt.qemu.org 04/01/2014 [ 194.199046] Cola de trabajo: smb3decryptd smb2_decrypt_offload [cifs] [ 194.200032] Seguimiento de llamadas: [ 194.200191]  [ [194.200327] dump_stack_lvl+0x4e/0x70 [194.200558] ? gf128mul_4k_lle+0xc1/0x110 [194.200809] print_report+0x174/0x505 [194.201040] ? __pfx__raw_spin_lock_irqsave+0x10/0x10 [194.201352] ? srso_return_thunk+0x5/0x5f [194.201604] ? __virt_addr_valid+0xdf/0x1c0 [194.201868] ? gf128mul_4k_lle+0xc1/0x110 [ 194.202128] kasan_report+0xc8/0x150 [ 194.202361] ? gf128mul_4k_lle+0xc1/0x110 [ 194.202616] gf128mul_4k_lle+0xc1/0x110 [ 194.202863] ghash_update+0x184/0x210 [ 194.203103] shash_ahash_update+0x184/0x2a0 [ 194.203377] ? __pfx_shash_ahash_update+0x10/0x10 [ 194.203651] ? srso_return_thunk+0x5/0x5f [ 194.203877] ? crypto_gcm_init_common+0x1ba/0x340 [ 194.204142] gcm_hash_assoc_remain_continue+0x10a/0x140 [ 194.204434] crypt_message+0xec1/0x10a0 [cifs] [ 194.206489] ? __pfx_crypt_message+0x10/0x10 [cifs] [ 194.208507] ? srso_return_thunk+0x5/0x5f [ 194.209205] ? srso_return_thunk+0x5/0x5f [ 194.209925] ? srso_return_thunk+0x5/0x5f [ 194.210443] ? srso_return_thunk+0x5/0x5f [ 194.211037] decrypt_raw_data+0x15f/0x250 [cifs] [ 194.212906] ? __pfx_decrypt_raw_data+0x10/0x10 [cifs] [ 194.214670] ? srso_return_thunk+0x5/0x5f [ 194.215193] smb2_decrypt_offload+0x12a/0x6c0 [cifs] Esto se debe a que TFM se est\u00e1 utilizando en paralelo. Solucione esto asignando un nuevo TFM AEAD para el descifrado asincr\u00f3nico, pero conserve el existente para los casos de LECTURA sincr\u00f3nica (similar a lo que se hace en smb3_calc_signature()). Tambi\u00e9n elimine las llamadas a aead_request_set_callback() y crypto_wait_req() ya que siempre ser\u00e1 una operaci\u00f3n sincr\u00f3nica.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"6.6.57\",\"matchCriteriaId\":\"D50B3F37-2EA9-4348-B50C-34DCAAF2076E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.11.4\",\"matchCriteriaId\":\"AA84D336-CE9A-4535-B901-1AD77EC17C34\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0809fb86ad13b29e1d6d491364fc7ea4fb545995\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/538c26d9bf70c90edc460d18c81008a4e555925a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8f14a476abba13144df5434871a7225fd29af633\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b0abcd65ec545701b8793e12bc27dc98042b151a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bce966530fd5542bbb422cb45ecb775f7a1a6bc3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ef51c0d544b1518b35364480317ab6d3468f205d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"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\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"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\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-10-22T13:24:02.635Z\"}}], \"cna\": {\"title\": \"smb: client: fix UAF in async decryption\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"35cf94a397280b9e27576ac1480f631bdd3e7b70\", \"lessThan\": \"8f14a476abba13144df5434871a7225fd29af633\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"35cf94a397280b9e27576ac1480f631bdd3e7b70\", \"lessThan\": \"ef51c0d544b1518b35364480317ab6d3468f205d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"35cf94a397280b9e27576ac1480f631bdd3e7b70\", \"lessThan\": \"bce966530fd5542bbb422cb45ecb775f7a1a6bc3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"35cf94a397280b9e27576ac1480f631bdd3e7b70\", \"lessThan\": \"0809fb86ad13b29e1d6d491364fc7ea4fb545995\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"35cf94a397280b9e27576ac1480f631bdd3e7b70\", \"lessThan\": \"538c26d9bf70c90edc460d18c81008a4e555925a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"35cf94a397280b9e27576ac1480f631bdd3e7b70\", \"lessThan\": \"b0abcd65ec545701b8793e12bc27dc98042b151a\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/smb/client/smb2ops.c\", \"fs/smb/client/smb2pdu.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.4\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.4\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.237\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.181\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.128\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.57\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/smb/client/smb2ops.c\", \"fs/smb/client/smb2pdu.c\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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]  \u003cTASK\u003e\\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\u0027s always going to be a synchronous operation.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.237\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.181\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.128\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.57\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.4\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"5.4\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-01-05T10:54:46.912Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-50047\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-05T10:54:46.912Z\", \"dateReserved\": \"2024-10-21T12:17:06.071Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T19:39:44.430Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.