01 Record

CVE-2024-35864

smb: client: fix potential UAF in smb2_is_valid_lease_break()

CriticalPUBLISHEDCNA: Linux

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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02 Description

smb: client: fix potential UAF in smb2_is_valid_lease_break()

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.66% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 51.1% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-08-04.

Red Hat severity

Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2024-05-19 08:34Z2 YR AGO

Last updated

2026-08-05 11:30Z2 MO AGO

Reserved

2024-05-17

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-416Use After FreeVariant

Data version

5.2

Document digest

d6d99405f13b6e46062fc92062f978615642b61601fbc8479762031329e1278c

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux7f48558e6489d032b1584b0cc9ac4bb11072c034 to < c868cabdf6fdd61bea54532271f4708254e57fc5, 7f48558e6489d032b1584b0cc9ac4bb11072c034 to < f92739fdd4522c4291277136399353d7c341fae4, 7f48558e6489d032b1584b0cc9ac4bb11072c034 to < a8344e2b69bde63f713b0aa796d70dbeadffddfb, 7f48558e6489d032b1584b0cc9ac4bb11072c034 to < 705c76fbf726c7a2f6ff9143d4013b18daaaebf1, a67172a013953664b1dad03c648200c70b90506c, 3.12.48 to < 3.13, 3.13—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/c868cabdf6fdd61bea54532271f4708254e57fc5
git.kernel.orghttps://git.kernel.org/stable/c/f92739fdd4522c4291277136399353d7c341fae4
git.kernel.orghttps://git.kernel.org/stable/c/a8344e2b69bde63f713b0aa796d70dbeadffddfb
git.kernel.orghttps://git.kernel.org/stable/c/705c76fbf726c7a2f6ff9143d4013b18daaaebf1

07 Fixed in

Debian 12

linux
Fixed in 6.1.85-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.8.9-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 6.8.9-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.