Home

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoid out of bounds access in decode_preauth_ctxt() Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within the SMB request boundary; deassemble_neg_contexts() only checks that the eight byte smb2_neg_context header + (client controlled) DataLength are within the packet boundary, which is insufficient. Checking for sizeof(struct smb2_preauth_neg_context) is overkill given that the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.

PUBLISHED Reserved 2025-12-30 | Published 2025-12-30 | Updated 2026-01-05 | Assigner Linux

Product status

Default status
unaffected

e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 (git) before 39f5b4b313b445c980a2a295bed28228c29228ed
affected

e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 (git) before a2f6ded41bec1d3be643c80a5eb97f1680309001
affected

e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 (git) before f02edb9debbd36f44efa7567031485892c7df60d
affected

e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 (git) before e7067a446264a7514fa1cfaa4052cdb6803bc6a2
affected

Default status
affected

5.15
affected

Any version before 5.15
unaffected

5.15.145 (semver)
unaffected

6.1.25 (semver)
unaffected

6.2.12 (semver)
unaffected

6.3 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/39f5b4b313b445c980a2a295bed28228c29228ed

git.kernel.org/...c/a2f6ded41bec1d3be643c80a5eb97f1680309001

git.kernel.org/...c/f02edb9debbd36f44efa7567031485892c7df60d

git.kernel.org/...c/e7067a446264a7514fa1cfaa4052cdb6803bc6a2

cve.org (CVE-2023-54250)

nvd.nist.gov (CVE-2023-54250)

Download JSON