CVE-2024-56729

smb: Initialize cfid->tcon before performing network ops

MEDIUM
4.7
CVSS Score
Published: December 29, 2024 at 11:30 AM UTC
Updated: October 30, 2026 at 01:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM4.7
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: smb: Initialize cfid->tcon before performing network ops Avoid leaking a tcon ref when a lease break races with opening the cached directory. Processing the leak break might take a reference to the tcon in cached_dir_lease_break() and then fail to release the ref in cached_dir_offload_close, since cfid->tcon is still NULL.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

6.1 ≤ v < 6.6.646.12 ≤ v < 6.12.26.7 ≤ v < 6.11.116.1ebe98f1447bbccf8228335c62d86af02a0ed23f7
Vendor states this is fixed in 1b9ab6b648f89441c8a13cb3fd8ca83ffebc5262 (fixed)
Vendor states this is fixed in 4b216c8f9c7d84ef7de33ca60b97e08e03ef3292 (fixed)
Vendor states this is fixed in 625e2357c8fcfae6e66dcc667dc656fe390bab15 (fixed)
Vendor states this is fixed in c353ee4fb119a2582d0e011f66a76a38f5cf984d (fixed)
Vendor states this is fixed in 6.1 (unaffected)
Vendor states this is fixed in 6.1.191 (unaffected)
Vendor states this is fixed in 6.11.11 (unaffected)
Vendor states this is fixed in 6.12.2 (unaffected)
Vendor states this is fixed in 6.13 (unaffected)
Vendor states this is fixed in 6.6.64 (unaffected)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.7MEDIUMCISA-ADP
Attack Vector
LOCAL
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-401

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