ALAS2027-2026-096

References: CVE-2026-86145  CVE-2026-89156  CVE-2026-89160  CVE-2026-89161  CVE-2026-89162 
FAQs regarding Amazon Linux ALAS/CVE Severity

Issue Overview:

Package updates are available for Amazon Linux 2027 that fix the following vulnerabilities:
CVE-2026-89162:
In PCRE2 before 10.48, pcre2_serialize_encode might disclose two bytes to an adversary, typically in a situation where the access available to the adversary is already unsafe.

CVE-2026-89161:
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.

CVE-2026-89160:
PCRE2 before 10.48 has a pcre2_match out-of-bounds read during the PCRE2_MATCH_INVALID_UTF matching of an invalid UTF subject.

CVE-2026-89156:
PCRE2 before 10.48 has a pcre2_match out-of-bounds read after a JIT fallback when an attacker can provide invalid UTF data.

CVE-2026-86145:
PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).

Issue Correction:
Run dnf update pcre2 --releasever 2027.0.20260928 or dnf update --advisory ALAS2027-2026-096 --releasever 2027.0.20260928 to update your system.

New Packages:

aarch64:
    pcre2-tools-debuginfo-10.48-1.amzn2027.0.1.aarch64
    pcre2-debuginfo-10.48-1.amzn2027.0.1.aarch64
    pcre2-debugsource-10.48-1.amzn2027.0.1.aarch64
    pcre2-utf32-debuginfo-10.48-1.amzn2027.0.1.aarch64
    pcre2-utf16-debuginfo-10.48-1.amzn2027.0.1.aarch64
    pcre2-static-10.48-1.amzn2027.0.1.aarch64
    pcre2-utf16-10.48-1.amzn2027.0.1.aarch64
    pcre2-tools-10.48-1.amzn2027.0.1.aarch64
    pcre2-10.48-1.amzn2027.0.1.aarch64
    pcre2-utf32-10.48-1.amzn2027.0.1.aarch64
    pcre2-devel-10.48-1.amzn2027.0.1.aarch64

noarch:
    pcre2-syntax-10.48-1.amzn2027.0.1.noarch

src:
    pcre2-10.48-1.amzn2027.0.1.src

x86_64:
    pcre2-utf32-debuginfo-10.48-1.amzn2027.0.1.x86_64
    pcre2-utf16-10.48-1.amzn2027.0.1.x86_64
    pcre2-debugsource-10.48-1.amzn2027.0.1.x86_64
    pcre2-devel-10.48-1.amzn2027.0.1.x86_64
    pcre2-tools-debuginfo-10.48-1.amzn2027.0.1.x86_64
    pcre2-static-10.48-1.amzn2027.0.1.x86_64
    pcre2-10.48-1.amzn2027.0.1.x86_64
    pcre2-debuginfo-10.48-1.amzn2027.0.1.x86_64
    pcre2-utf16-debuginfo-10.48-1.amzn2027.0.1.x86_64
    pcre2-tools-10.48-1.amzn2027.0.1.x86_64
    pcre2-utf32-10.48-1.amzn2027.0.1.x86_64