8.1

CVE-2023-4130: ksmbd: fix wrong next length validation of ea buffer in smb2_set_ea()

Modified
AliasesUBUNTU-CVE-2023-4130DEBIAN-CVE-2023-4130
Published 16-08-2025Last modified 15-08-2026

Vulnerability summary

CVE-2023-4130 is a high (CVSS 8.1) vulnerability in linux. EPSS estimates a 0.51% chance of exploitation in the next 30 days, higher than 43.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.1, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.51%
0%100%
Low · +0.01 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 11 · Related 11
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 wrong next length validation of ea buffer in smb2_set_ea() There are multiple smb2_ea_info buffers in FILE_FULL_EA_INFORMATION request from client. ksmbd find next smb2_ea_info using ->NextEntryOffset of current smb2_ea_info. ksmbd need to validate buffer length Before accessing the next ea. ksmbd should check buffer length using buf_len, not next variable. next is the start offset of current ea that got from previous ea.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.51%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.49% 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

No weakness data has been published for this record.

Affected systems

Version check

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

Ubuntu107 products
  • linux< 5.15.0-91.101
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1051.56
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < aeb974907642be095e38ecb1a400ca583958b2b0 | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < f339d76a3a972601d0738b881b099d49ebbdc3a2 | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 4bf629262f9118ee91b1c3a518ebf2b3bcb22180 | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 79ed288cef201f1f212dfb934bcaac75572fb8f6 | 5.15
  • linux_kernel≥ 5.15, < 5.15.127 | ≥ 5.16, < 6.1.46 | ≥ 6.2, < 6.4.11 | 6.5:rc1 | 6.5:rc2 | 6.5:rc3 | 6.5:rc4 | 6.5:rc5
Debian1 product
  • linux< 6.1.52-1 | < 6.4.11-1

3 vendors · 110 products

References

8 links