9.8

CVE-2024-50086: linux Use After Free

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2024-50086DEBIAN-CVE-2024-50086
Published 29-10-2024Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2024-50086 is a critical (CVSS 9.8) Use After Free vulnerability in linux. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 39.8% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.48%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 29 · Related 30
DLA-4008-1OPENSUSE-SU-2024:14500-1OPENSUSE-SU-2025:14705-1USN-7288-1USN-7288-2USN-7289-1

Timeline

  1. 29-10-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix user-after-free from session log off There is racy issue between smb2 session log off and smb2 session setup. It will cause user-after-free from session log off. This add session_lock when setting SMB2_SESSION_EXPIRED and referece count to session struct not to free session while it is being used.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.48%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

0.00 pp

From 0.48% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.48%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu122 products
  • linux< 5.15.0-133.144 | < 6.8.0-56.58
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1078.85 | < 6.8.0-1025.27
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 0f62358ce85b2d4c949ef1b648be01b29cec667a | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < a9839c37fd813b432988f58a9d9dd59253d3eb2c | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 5511999e9615e4318e9142d23b29bd1597befc08 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < ee371898b53a9b9b51c02d22a8c31bfb86d45f0d | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 7aa8804c0b67b3cb263a472d17f2cb50d7f1a930 | 5.15
  • linux_kernel< 6.1.114 | ≥ 6.2, < 6.6.58 | ≥ 6.7, < 6.11.5 | 6.12:rc1 | 6.12:rc2 | 6.12:rc3
Debian1 product
  • linux< 6.1.115-1 | < 6.11.5-1

3 vendors · 125 products

References

38 links
Show all 38 references