This update for zlib fixes the following issue:
* CVE-2026-27171: Fixed infinite loop via the `crc32_combine64` and
`crc32_combine_gen64` functions due to missing checks for negative lengths
(bsc#1258392).
## Patch Instructions:
To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:
* Development Tools Module 15-SP7
zypper in -t patch SUSE-SLE-Module-Development-Tools-15-SP7-2026-783=1
* openSUSE Leap 15.5
zypper in -t patch SUSE-2026-783=1
* openSUSE Leap 15.6
zypper in -t patch openSUSE-SLE-15.6-2026-783=1
* SUSE Linux Enterprise Micro 5.5
zypper in -t patch SUSE-SLE-Micro-5.5-2026-783=1
* Basesystem Module 15-SP7
zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-783=1
* Development Tools Module 15-SP7 (x86_64)
* zlib-devel-32bit-1.2.13-150500.4.6.1
* openSUSE Leap 15.5 (aarch64 ppc64le s390x x86_64 i586)
* zlib-devel-static-1.2.13-150500.4.6.1
* zlib-testsuite-debuginfo-1.2.13-150500.4.6.1
* libminizip1-debuginfo-1.2.13-150500.4.6.1
* libminizip1-1.2.13-150500.4.6.1
* zlib-devel-1.2.13-150500.4.6.1
* zlib-testsuite-1.2.13-150500.4.6.1
* libz1-1.2.13-150500.4.6.1
* zlib-debugsource-1.2.13-150500.4.6.1
* libz1-debuginfo-1.2.13-150500.4.6.1
* minizip-devel-1.2.13-150500.4.6.1
* openSUSE Leap 15.5 (x86_64)
* libz1-32bit-debuginfo-1.2.13-150500.4.6.1
* libz1-32bit-1.2.13-150500.4.6.1
* zlib-devel-static-32bit-1.2.13-150500.4.6.1
* libminizip1-32bit-debuginfo-1.2.13-150500.4.6.1
* zlib-devel-32bit-1.2.13-150500.4.6.1
* libminizip1-32bit-1.2.13-150500.4.6.1
* openSUSE Leap 15.5 (aarch64_ilp32)
* libminizip1-64bit-debuginfo-1.2.13-150500.4.6.1
* libz1-64bit-1.2.13-150500.4.6.1
* libz1-64bit-debuginfo-1.2.13-150500.4.6.1
* zlib-devel-64bit-1.2.13-150500.4.6.1
*...
Read the Full Advisory* bsc#1258392
## References:
* https://www.suse.com/security/cve/CVE-2026-27171.html
* https://bugzilla.suse.com/show_bug.cgi?id=1258392
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