8.2

CVE-2023-39191: Kernel: ebpf: insufficient stack type checks in dynptr

Modified
AliasesUBUNTU-CVE-2023-39191DEBIAN-CVE-2023-39191
Published 04-10-2023Last modified 06-11-2025

Vulnerability summary

CVE-2023-39191 is a high (CVSS 8.2) Improper Input Validation vulnerability in fedoraproject fedora. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 44.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.2, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.2/10
010
High · v3.1 (CVE.org)
EPSS score
0.53%
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 13 · Related 9
RHSA-2023:6583RHSA-2024:0381RHSA-2024:0439RHSA-2024:0448SUSE-SU-2023:4343-1SUSE-SU-2023:4375-1

Timeline

  1. 04-10-2023
    PublishedVulnerability first disclosed.
  2. 06-11-2025
    Last modifiedVulnerability information updated.

Description

An improper input validation flaw was found in the eBPF subsystem in the Linux kernel. The issue occurs due to a lack of proper validation of dynamic pointers within user-supplied eBPF programs prior to executing them. This may allow an attacker with CAP_BPF privileges to escalate privileges and execute arbitrary code in the context of the kernel.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.53%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.53% 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: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu62 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.3.7-1
Fedoraproject1 product
Linux1 product
Redhat1 product

5 vendors · 66 products

References

12 links
Show all 12 references