7.5

CVE-2023-39197: Kernel: dccp: conntrack out-of-bounds read in nf_conntrack_dccp_packet()

Modified
AliasesUBUNTU-CVE-2023-39197DEBIAN-CVE-2023-39197
Published 23-01-2024Last modified 06-08-2026

Vulnerability summary

CVE-2023-39197 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in fedoraproject fedora. EPSS estimates a 0.98% chance of exploitation in the next 30 days, higher than 62.1% 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
0.98%
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 37 · Related 37
SUSE-SU-2023:4730-1SUSE-SU-2023:4731-1SUSE-SU-2023:4732-1SUSE-SU-2023:4733-1SUSE-SU-2023:4734-1SUSE-SU-2023:4735-1

Timeline

  1. 23-01-2024
    PublishedVulnerability first disclosed.
  2. 06-08-2026
    Last modifiedVulnerability information updated.

Description

An out-of-bounds read vulnerability was found in Netfilter Connection Tracking (conntrack) in the Linux kernel. This flaw allows a remote user to disclose sensitive information via the DCCP protocol.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.98%

Chance of exploitation in the next 30 days

Percentile

62%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.98% 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.

Ubuntu106 products
  • linuxAll versions (No fix recorded) | < 4.4.0-252.286 | < 4.15.0-223.235 | < 5.4.0-166.183 | < 5.15.0-86.96
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1129.135 | < 4.4.0-1167.182 | < 4.15.0-1166.179 | < 5.4.0-1113.123 | < 5.15.0-1047.52
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.52-1 | < 6.4.4-1
Fedoraproject1 product
Linux1 product
  • linux_kernel≥ 2.6.26, < 5.4.251 | ≥ 5.5, < 5.10.188 | ≥ 5.11, < 5.15.121 | ≥ 5.16, < 6.1.39 | ≥ 6.2, < 6.3.13 | ≥ 6.4, < 6.4.4

4 vendors · 109 products

References

12 links
Show all 12 references