9.1

CVE-2023-3867: ksmbd: fix out of bounds read in smb2_sess_setup

Modified
AliasesUBUNTU-CVE-2023-3867DEBIAN-CVE-2023-3867
Published 16-08-2025Last modified 15-08-2026

Vulnerability summary

CVE-2023-3867 is a critical (CVSS 9.1) Out-of-bounds Read vulnerability in linux. EPSS estimates a 6.06% chance of exploitation in the next 30 days, higher than 93.3% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.1 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 6% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)
EPSS score
6.06%
0%100%
Low · +0.69 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 16 · Related 16
SUSE-SU-2025:03272-1SUSE-SU-2025:03290-1SUSE-SU-2025:03301-1SUSE-SU-2025:03382-1SUSE-SU-2025:03602-1SUSE-SU-2025:03633-1

Timeline

  1. 16-08-2025
    PublishedVulnerability first disclosed.
  2. 15-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out of bounds read in smb2_sess_setup ksmbd does not consider the case of that smb2 session setup is in compound request. If this is the second payload of the compound, OOB read issue occurs while processing the first payload in the smb2_sess_setup().

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

6.06%

Chance of exploitation in the next 30 days

Percentile

93%

Versus all other CVEs

30-day change

Increase +0.69 pp

From 5.37% 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.

Ubuntu94 products
  • linux< 5.15.0-102.112
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1057.63
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 676392184785ace61e939831e7ca44a03d438c3b | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < ef572ffa8eb44111eed2925fbb2adca78bdcbf61 | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 2ba03cecb12ac7ac9e0170e251543c56832d9959 | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 98422bdd4cb3ca4d08844046f6507d7ec2c2b8d8 | 5.15
  • linux_kernel≥ 5.15, < 5.15.145 | ≥ 5.16, < 6.1.40 | ≥ 6.2, < 6.4.5
Debian1 product
  • linux< 6.1.52-1 | < 6.4.11-1

3 vendors · 97 products

References

15 links
Show all 15 references