{"id":"DEBIAN-CVE-2024-50047","details":"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]  \u003cTASK\u003e     [  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.","modified":"2026-09-15T09:02:58.903048736Z","published":"2024-10-21T20:15:17.507Z","upstream":["CVE-2024-50047"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-50047"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.128-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-50047.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.11.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-50047.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.11.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-50047.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}