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openSUSE Libyang Important Buffer Integer Overflow Vuln 2026-2335-1

suse
Calendar Grey June 10, 2026
Dist Suse Esm H88
Critical updates fix important buffer and integer overflow issues for libyang in openSUSE, enhancing system security.
An update that solves two vulnerabilities can now be installed.

Summary

## This update for libyang fixes the following issues * CVE-2026-41401: use-after-free in `lyd_parser_set_data_flags` when processing crafted YANG XML documents with specific metadata attributes (bsc#1266316). * CVE-2026-44673: integer overflow in `lyb_read_string()` of `src/parser_lyb.c` leads to heap buffer overflow when parsing a maliciously crafted LYB binary blob (bsc#1265330). ## 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: * openSUSE Leap 15.5 zypper in -t patch SUSE-2026-2335=1 * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-2335=1

Topics%20covered

Topics Covered

security advisory buffer overflow important integer overflow OpenSUSE libyang

References

* bsc#1265330

* bsc#1266316

Cross-

* CVE-2026-41401

* CVE-2026-44673

CVSS scores:

* CVE-2026-41401 ( SUSE ): 9.2

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

* CVE-2026-41401 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-41401 ( NVD ): 7.1

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

* CVE-2026-41401 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-44673 ( SUSE ): 8.8

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

* CVE-2026-44673 ( SUSE ): 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2335-1
Release Date: 2026-06-10T08:43:18Z
Rating: important

Topics%20covered

Topics Covered

security advisory buffer overflow important integer overflow OpenSUSE libyang

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