9.8

CVE-2024-35864: smb: client: fix potential UAF in smb2_is_valid_lease_break()

Modified
AliasesUBUNTU-CVE-2024-35864DEBIAN-CVE-2024-35864
Published 19-05-2024Last modified 05-08-2026

Vulnerability summary

CVE-2024-35864 is a critical (CVSS 9.8) Use After Free vulnerability in linux. EPSS estimates a 0.66% chance of exploitation in the next 30 days, higher than 51.7% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.66%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 154 · Related 150
LSN-0111-1LSN-0112-1RHSA-2024:9315SUSE-SU-2024:2008-1SUSE-SU-2024:2019-1SUSE-SU-2024:2135-1

Showing 100 of 154.

Timeline

  1. 19-05-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.66%

Chance of exploitation in the next 30 days

Percentile

52%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.66% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu122 products
  • linuxAll versions (No fix recorded) | < 4.4.0-268.302 | < 4.15.0-237.249 | < 5.4.0-212.232 | < 5.15.0-136.147 | < 6.8.0-38.38
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1143.149 | < 4.4.0-1181.196 | < 4.15.0-1180.193 | < 5.4.0-1144.154 | < 5.15.0-1081.88 | < 6.8.0-1011.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 7f48558e6489d032b1584b0cc9ac4bb11072c034, < c868cabdf6fdd61bea54532271f4708254e57fc5 | ≥ 7f48558e6489d032b1584b0cc9ac4bb11072c034, < f92739fdd4522c4291277136399353d7c341fae4 | ≥ 7f48558e6489d032b1584b0cc9ac4bb11072c034, < a8344e2b69bde63f713b0aa796d70dbeadffddfb | ≥ 7f48558e6489d032b1584b0cc9ac4bb11072c034, < 705c76fbf726c7a2f6ff9143d4013b18daaaebf1 | a67172a013953664b1dad03c648200c70b90506c | ≥ 3.12.48, < 3.13 | 3.13
  • linux_kernel< 6.1.85 | ≥ 6.2, < 6.6.26 | ≥ 6.7, < 6.8.5 | 6.9:rc1 | 6.9:rc2
Debian1 product
  • linux< 6.1.85-1 | < 6.8.9-1

3 vendors · 125 products

References

42 links
Show all 42 references