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

Mariner

Read the vendor bulletin Get alerts for azl3 pcre2 10.42-3 on Azure Linux

6.5CVSS out of 10Medium severity

Scope

What the vendor says is affected

azl3 pcre2 10.42-3 on Azure Linux 3.0

Next step

What the vendor recommends

See the Microsoft Security Update Guide for the update that applies to your product.

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Timeline

When this advisory changed

Sep 12, 2026 at 1:03 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Sep 13, 2026 at 8:45 AM UTC
Added to SecurityAlert
We collected the advisory from the official source.

Vulnerabilities

CVEs named in this advisory

CVE-2026-89158View CVSS, KEV, EPSS, and threat context

Source

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Vendor: Microsoft Security Response Center
Advisory ID: CVE-2026-89158
Last source check: Sep 13, 2026 at 8:45 AM UTC

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Watch azl3 pcre2 10.42-3 on Azure Linux

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What the vendor says is affected

What the vendor recommends

When this advisory changed

CVEs named in this advisory

Related advisories from Microsoft Security Response Center

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_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.

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