CVE-2026-12548

Publication date 21 July 2026

Last updated 3 November 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

4.2 · Medium

Score breakdown

Description

A heap out-of-bounds read flaw was found in libsoup. When parsing multipart HTTP messages, an integer type mismatch between the caller and soup_headers_parse() can cause the length parameter to be incorrectly truncated, leading to a heap buffer over-read. A remote attacker could use this flaw to crash an application using libsoup or potentially disclose heap memory contents.

Status

Package Ubuntu Release Status
libsoup2.4 26.10 stonking
Needs evaluation
26.04 LTS resolute
Fixed in 2.74.3-10.1ubuntu5+esm4
24.04 LTS noble
Fixed in 2.74.3-6ubuntu1.10
22.04 LTS jammy
Fixed in 2.74.2-3ubuntu0.10
20.04 LTS focal
Fixed in 2.70.0-1ubuntu0.5+esm5
18.04 LTS bionic
Fixed in 2.62.1-1ubuntu0.4+esm10
16.04 LTS xenial
Fixed in 2.52.2-1ubuntu0.3+esm9
libsoup3 26.10 stonking
Fixed in 3.6.6-1ubuntu3.1
26.04 LTS resolute
Fixed in 3.6.6-1ubuntu0.2
24.04 LTS noble
Fixed in 3.4.4-5ubuntu0.10
22.04 LTS jammy
Fixed in 3.0.7-0ubuntu1+esm10

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libsoup2.4
libsoup3

Severity score breakdown

CVSS version: CVSS v3.0

Base score 4.2 · Medium

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L

References

Related Ubuntu Security Notices (USN)

    • USN-8975-1
    • libsoup vulnerabilities
    • 3 November 2026

Other references

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