Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix next_buffer UAF and NextCommand bounds in compound PDUs Fix several related bounds checking and pointer lifecycle issues in receive_encrypted_standard()'s handling of compound encrypted frames: - Clear next_buffer after assigning it to server->bigbuf. A stale next_buffer pointer can lead to a use-after-free on subsequent error paths. - Update pdu_length to the decrypted plaintext size (buf_size). Using the pre-decryption length allows NextCommand to point into stale ciphertext residue. - Reject next_cmd values smaller than MID_HEADER_SIZE(server). - Fix an integer overflow in the upper bound check by verifying pdu_length - next_cmd < MID_HEADER_SIZE(server), ensuring the trailing slice is large enough for a header.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b24df3e30cbf48255db866720fb71f14bf9d2f39 before 72eaef1f37a3b6bec11c342736834dc3707be3e4; affected b24df3e30cbf48255db866720fb71f14bf9d2f39 before 491e33144dee872cffda207f6fcb09260728f803; affected b24df3e30cbf48255db866720fb71f14bf9d2f39 before 8749946579708ea0d339034bb7f423a67dbe89cf; affected b24df3e30cbf48255db866720fb71f14bf9d2f39 before 96c436e4b010711452b2872558938f4ef276492a; affected b24df3e30cbf48255db866720fb71f14bf9d2f39 before 858d5ac22cb889266993e7670f9f0c4f4aeedd78; affected b24df3e30cbf48255db866720fb71f14bf9d2f39 before 05762c5bc1cfdcac36747994fde2c04387a457f1 |
| Linux / Linux | affected 4.19; unaffected 0 before 4.19; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.54 through 6.18.*; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/72eaef1f37a3b6bec11c342736834dc3707be3e4
- https://git.kernel.org/stable/c/491e33144dee872cffda207f6fcb09260728f803
- https://git.kernel.org/stable/c/8749946579708ea0d339034bb7f423a67dbe89cf
- https://git.kernel.org/stable/c/96c436e4b010711452b2872558938f4ef276492a
- https://git.kernel.org/stable/c/858d5ac22cb889266993e7670f9f0c4f4aeedd78
- https://git.kernel.org/stable/c/05762c5bc1cfdcac36747994fde2c04387a457f1