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CVE-2026-64597

smb: client: fix double-free in SMB2_close() replay PUBLISHED

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_close() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_close_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent the stale free.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 433042a91f9373241307725b52de573933ffedbf before 037511726228aaf165c7067ff2bfc88eaecdf1f3; affected 4f1fffa2376922f3d1d506e49c0fd445b023a28e before 0aa97edf7c347c0f54e7e60c4740574b8120c66a; affected 4f1fffa2376922f3d1d506e49c0fd445b023a28e before d15d83125007f673aec4323e1bbbaaffbe87ea13; affected 4f1fffa2376922f3d1d506e49c0fd445b023a28e before b18ed621dbfceecea5539848cddcb9272c9a61e1; affected 4f1fffa2376922f3d1d506e49c0fd445b023a28e before f96e1cdcb63ed3321142ff2fcdf784e32cda8fee; affected 6.6.32 before 6.6.145
Linux / Linuxaffected 6.8; unaffected 0 before 6.8; unaffected 6.6.145 through 6.6.*; unaffected 6.12.96 through 6.12.*; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.