9.8

CVE-2024-50286: ksmbd: fix slab-use-after-free in ksmbd_smb2_session_create

Modified
AliasesUBUNTU-CVE-2024-50286DEBIAN-CVE-2024-50286
Published 19-11-2024Last modified 05-08-2026

Vulnerability summary

CVE-2024-50286 is a critical (CVSS 9.8) Use After Free vulnerability in linux. EPSS estimates a 0.67% chance of exploitation in the next 30 days, higher than 52% 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
0.67%
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 12 · Related 12
DLA-4008-1DSA-5818-1USN-7310-1USN-7449-1USN-7449-2USN-7450-1

Timeline

  1. 19-11-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix slab-use-after-free in ksmbd_smb2_session_create There is a race condition between ksmbd_smb2_session_create and ksmbd_expire_session. This patch add missing sessions_table_lock while adding/deleting session from global session table.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.67%

Chance of exploitation in the next 30 days

Percentile

52%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.67% 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.

Ubuntu123 products
  • linuxAll versions (No fix recorded) | < 6.8.0-58.60
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1027.29
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < f56446ba5378d19e31040b548a14ee9a8f1500ea | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < e923503a56b3385b64ae492e3225e4623f560c5b | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < e7a2ad2044377853cf8c59528dac808a08a99c72 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 0a77715db22611df50b178374c51e2ba0d58866e | 5.15
  • linux_kernel< 6.1.117 | ≥ 6.2, < 6.6.61 | ≥ 6.7, < 6.11.8 | 6.12:rc1 | 6.12:rc2 | 6.12:rc3 | 6.12:rc4 | 6.12:rc5 | 6.12:rc6
Debian1 product
  • linux< 6.1.119-1 | < 6.11.9-1

3 vendors · 126 products

References

21 links
Show all 21 references