CVE-2026-98171 Affecting kernel-64kb-devel package, versions <6.12.0-160000.40.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.54% (46th percentile)

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  • Snyk IDSNYK-SLES1600-KERNEL64KBDEVEL-21884036
  • published30 Oct 2026
  • disclosed24 Oct 2026

Introduced: 24 Oct 2026

NewCVE-2026-98171  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 kernel-64kb-devel to version 6.12.0-160000.40.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64kb-devel package and not the kernel-64kb-devel package as distributed by SLES. See How to fix? for SLES:16.0.0 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1