8.8

CVE-2025-37926: ksmbd: fix use-after-free in ksmbd_session_rpc_open

Modified
AliasesUBUNTU-CVE-2025-37926DEBIAN-CVE-2025-37926
Published 20-05-2025Last modified 05-08-2026

Vulnerability summary

CVE-2025-37926 is a high (CVSS 8.8) Use After Free vulnerability in linux. EPSS estimates a 0.57% chance of exploitation in the next 30 days, higher than 47.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.8, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.57%
0%100%
Low · +0.02 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 17 · Related 15
DLA-4476-1DSA-6127-1USN-7649-1USN-7649-2USN-7650-1USN-7665-1

Timeline

  1. 20-05-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in ksmbd_session_rpc_open A UAF issue can occur due to a race condition between ksmbd_session_rpc_open() and __session_rpc_close(). Add rpc_lock to the session to protect it.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.57%

Chance of exploitation in the next 30 days

Percentile

47%

Versus all other CVEs

30-day change

Increase +0.02 pp

From 0.55% 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, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu133 products
  • linuxAll versions (No fix recorded) | < 6.8.0-117.117
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1055.58
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < a4348710a7267705b75692dc1a000920481d1d92 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 1067361a1cc6ad9cdf7acfc47f90012b72ad1502 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 8fb3b6c85b7e3127161623586b62abcc366caa20 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 6323fec65fe54b365961fed260dd579191e46121 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < a1f46c99d9ea411f9bf30025b912d881d36fc709 | 5.15
  • linux_kernel≥ 5.15, < 6.12.28 | ≥ 6.13, < 6.14.6 | 6.15:rc1 | 6.15:rc2 | 6.15:rc3 | 6.15:rc4
Debian1 product
  • linux< 6.1.162-1 | < 6.12.29-1

3 vendors · 136 products

References

24 links
Show all 24 references