CVE-2026-98171
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
smb: client: fix next_buffer UAF and NextCommand bounds in compound PDUs
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| b24df3e30cbf48255db866720fb71f14bf9d2f39 | affected | git | 72eaef1f37a3b6bec11c342736834dc3707be3e4 | Unavailable | None listed |
| b24df3e30cbf48255db866720fb71f14bf9d2f39 | affected | git | 491e33144dee872cffda207f6fcb09260728f803 | Unavailable | None listed |
| b24df3e30cbf48255db866720fb71f14bf9d2f39 | affected | git | 8749946579708ea0d339034bb7f423a67dbe89cf | Unavailable | None listed |
| b24df3e30cbf48255db866720fb71f14bf9d2f39 | affected | git | 96c436e4b010711452b2872558938f4ef276492a | Unavailable | None listed |
| b24df3e30cbf48255db866720fb71f14bf9d2f39 | affected | git | 858d5ac22cb889266993e7670f9f0c4f4aeedd78 | Unavailable | None listed |
| b24df3e30cbf48255db866720fb71f14bf9d2f39 | affected | git | 05762c5bc1cfdcac36747994fde2c04387a457f1 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.19 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.19 | Unavailable | None listed |
| 6.1.189 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.158 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.112 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.54 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.8 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |