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Fencer Vulns
medium 6.5

CVE-2026-2369 json

Libsoup: libsoup: buffer overread due to integer underflow when handling zero-length resources

published 2026-03-19 7 mo ago modified 2026-11-05 3 d ago also EUVD-2026-13105

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

A flaw was found in libsoup. An integer underflow vulnerability occurs when processing content with a zero-length resource, leading to a buffer overread. This can allow an attacker to potentially access sensitive information or cause an application level denial of service.

Patch / fix

  • libsoup2.4 Ubuntu 22.04 LTS 2.74.2-3ubuntu0.7
  • libsoup2.4 Ubuntu 24.04 LTS 2.74.3-6ubuntu1.7
  • libsoup2.4 Ubuntu 25.10 2.74.3-10.1ubuntu4.1
  • libsoup2.4 Ubuntu Pro 18.04 LTS 2.62.1-1ubuntu0.4+esm7
  • libsoup2.4 Ubuntu Pro 20.04 LTS 2.70.0-1ubuntu0.5+esm2
  • libsoup2.4 Ubuntu Pro 26.04 LTS 2.74.3-10.1ubuntu5+esm1

ubuntu advisories UBUNTU-CVE-2026-2369

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libsoup SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 3.6.6-160000.1.1
  • libsoup2 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +8 more 2.74.2-150400.3.31.1
  • libsoup Linux Micro 6.1 3.4.4-slfo.1.1_7.1
  • libsoup Linux Micro 6.0 3.4.2-13.1
  • libsoup SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Basesystem 15 SP7 +1 more 3.4.4-150600.3.34.1
  • libsoup SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 3.0.4-150400.3.34.1
  • libsoup SLE Micro 5.2 2.68.4-150200.4.30.1
  • libsoup2 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Basesystem 15 SP7 +1 more 2.74.3-150600.4.27.1

suse advisories SUSE-SU-2026:20752-1SUSE-SU-2026:20902-1SUSE-SU-2026:0834-1SUSE-SU-2026:20649-1SUSE-SU-2026:20529-1SUSE-SU-2026:0703-1

  • libsoup openSUSE Leap 16.0 3.6.6-160000.1.1
  • libsoup2 openSUSE Leap 16.0 2.74.3-160000.4.1
  • libsoup openSUSE Tumbleweed 3.6.5-13.1
  • libsoup2 openSUSE Tumbleweed 2.74.3-16.1

opensuse advisories openSUSE-SU-2026:20384-1openSUSE-SU-2026:20354-1openSUSE-SU-2026:10208-1openSUSE-SU-2026:10209-1

  • libsoup Azure Linux 3.0 3.4.4-14

azure linux advisories AZL-80412

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-2369 updated cvss 6.5

libsoup: libsoup: Buffer overread due to integer underflow when handling zero-length resources

  • Red Hat Enterprise Linux 10 libsoup3
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux 6 libsoup Red Hat Enterprise Linux 7 libsoup Red Hat Enterprise Linux 8 libsoup Red Hat Enterprise Linux 9 libsoup
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
7 mo ago

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
NVD 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-191 Integer Underflow (Wrap or Wraparound)

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.