Libsoup: libsoup: heap buffer over-read via integer underflow in soup_filter_input_stream_read_until()

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Read the vendor bulletin Get alerts for azl3 libsoup 3.4.4-16 on Azure Linux

6.5CVSS out of 10Medium severity

Scope

What the vendor says is affected

azl3 libsoup 3.4.4-16 on Azure Linux 3.0

Timeline

When this advisory changed

Aug 7, 2026 at 12:24 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Sep 3, 2026 at 11:40 PM UTC
Added to SecurityAlert
We collected the advisory from the official source.
Sep 4, 2026 at 5:45 AM UTC
Confirmed at the source
Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-66337View CVSS, KEV, EPSS, and threat context

Source

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Vendor: Microsoft Security Response Center
Advisory ID: CVE-2026-66337
Last source check: Sep 14, 2026 at 3:00 AM UTC

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Watch azl3 libsoup 3.4.4-16 on Azure Linux

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What the vendor says is affected

When this advisory changed

CVEs named in this advisory

Related advisories from Microsoft Security Response Center

undici vulnerable to Denial of Service via orphaned RetryHandler response body

PCRE2 before 10.48 has a pcre2_match out-of-bounds read after a JIT fallback when an attacker can provide invalid UTF data.

PCRE2 before 10.48, on 32-bit platforms, has a pcre2_compile_32 integer overflow and resultant out-of-bounds write.

PCRE2 before 10.48, on 32-bit platforms, has a pcre2_pattern_convert out-of-bounds write when an attacker can provide a large pattern.

PCRE2 before 10.48 has a pcre2_match out-of-bounds read during the PCRE2_MATCH_INVALID_UTF matching of an invalid UTF subject.

In PCRE2 before 10.48, pcre2_jit_match mishandles a previously copied subject being passed in as a context. An incorrect free operation can occur.