7.5

CVE-2023-4458: Kernel: ksmbd: smb2_open out-of-bounds read information disclosure vulnerability

Analyzed
AliasesUBUNTU-CVE-2023-4458DEBIAN-CVE-2023-4458CGA-2754-h8f9-vr3c
Published 14-11-2024Last modified 14-11-2024

Vulnerability summary

CVE-2023-4458 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in linux linux_kernel. EPSS estimates a 0.84% chance of exploitation in the next 30 days, higher than 58% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 4, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.84%
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 0 · Related 5
CGA-CPV8-559Q-H5V6CGA-FRV9-CC25-F34RCGA-GHHG-5PR3-FF69CGA-M88Q-99GM-CPJ6CGA-XRCQ-5F37-MW8P

Timeline

  1. 14-11-2024
    PublishedVulnerability first disclosed.
  2. 14-11-2024
    Last modifiedVulnerability information updated.

Description

A flaw was found within the parsing of extended attributes in the kernel ksmbd module. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this to disclose sensitive information on affected installations of Linux. Only systems with ksmbd enabled are vulnerable to this CVE.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

0.84%

Chance of exploitation in the next 30 days

Percentile

58%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.84% 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.

Ubuntu101 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)
Chainguard34 products
  • hyperv-daemons-genericAll versions (No fix recorded)
  • linux-aws-6.12All versions (No fix recorded)
  • linux-aws-6.18All versions (No fix recorded)
  • linux-aws-genericAll versions (No fix recorded)
  • linux-aws-generic-boot-installedAll versions (No fix recorded)
Debian1 product
  • linux< 6.1.52-1 | < 6.5.3-1
Linux1 product
  • linux_kernel< 5.15.131 | ≥ 5.16, < 6.1.52 | ≥ 6.2, < 6.4.15 | ≥ 6.5, < 6.5.2

4 vendors · 137 products

References

7 links