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CVE-2024-35864

smb: client: fix potential UAF in smb2_is_valid_lease_break()

HIGH
7.8
CVSS Score
Published: May 19, 2024 at 08:34 AM UTC
Updated: August 5, 2026 at 12:04 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in smb2_is_valid_lease_break() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.

Affected

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

Linux Kernel· Linux
95%
v ≥ 3.12.48v < 6.1.853.12.48 ≤ v < 3.133.13 ≤ v < 6.1.853.13 ≤ v < 6.6.263.13 ≤ v < 6.8.53.13 ≤ v < 6.96.2 ≤ v < 6.6.266.7 ≤ v < 6.8.53.12.486.9 rc16.9 rc27f48558e6489d032b1584b0cc9ac4bb11072c034a67172a013953664b1dad03c648200c70b90506c
Vendor states this is fixed in 705c76fbf726c7a2f6ff9143d4013b18daaaebf1 (fixed)
Vendor states this is fixed in a8344e2b69bde63f713b0aa796d70dbeadffddfb (fixed)
Vendor states this is fixed in c868cabdf6fdd61bea54532271f4708254e57fc5 (fixed)
Vendor states this is fixed in f92739fdd4522c4291277136399353d7c341fae4 (fixed)
Vendor states this is fixed in 3.13 (unaffected)
Vendor states this is fixed in 6.1.85 (unaffected)
Vendor states this is fixed in 6.6.26 (unaffected)
Vendor states this is fixed in 6.8.5 (unaffected)
Vendor states this is fixed in 6.9 (unaffected)

References (4)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/705c76fbf726c7a2f6ff9143d4013b18daaaebf1
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a8344e2b69bde63f713b0aa796d70dbeadffddfb
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/c868cabdf6fdd61bea54532271f4708254e57fc5
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/f92739fdd4522c4291277136399353d7c341fae4

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

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

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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