# CVE-2026-48863: Libsolv: stack-based buffer overflow in libsolv eddsa pgp signature verification allows denial of service CVE-2026-48863 is fixed in 16 products on 1 platform, first by ALAS2023-2026-1798, released June 8, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-48863 - Priority: High - CVSS: 7.5 (Important) - EPSS: 0.0082 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jun 8, 2026 - Weakness: Stack-based Buffer Overflow - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48863 ## Description A flaw was found in libsolv. A stack-based buffer overflow vulnerability exists in the PGP verification component due to incorrect length handling when copying EdDSA 's' MPI into a stack buffer. A remote attacker could craft a malicious Ed25519 PGP signature with mismatched MPI lengths. Processing this crafted signature could lead to a denial of service in automated package or repository processing workflows. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | libsolv Debian 14 | 0.7.38-1 | [DEBIAN-CVE-2026-48863](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48863.md) | Jun 24, 2026 | | Linux | libsolv amzn 2023 | 0.7.22-1.amzn2023.0.4 | [ALAS2023-2026-1798](https://patchblox.com/security/data/fix/linux/alas2023-2026-1798.md) | Jun 8, 2026 | | Linux | libsolv opensuse-leap 16.0 | 0.7.39-160000.1.1 | [OPENSUSE-SU-2026:21096-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21096-1.md) | Jun 19, 2026 | | Linux | libsolv sles 15.6 | 0.7.39-150600.8.24.1 | [SUSE-SU-2026:2590-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2590-1.md) | Jun 23, 2026 | | Linux | libsolv sles 15.7 | 0.7.39-150700.11.10.1 | [SUSE-SU-2026:2531-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2531-1.md) | Jun 23, 2026 | | Linux | libsolv sles 16.0 | 0.7.39-160000.1.1 | [SUSE-SU-2026:22172-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22172-1.md) | Jun 19, 2026 | | Linux | libsolv-debuginfo amzn 2023 | 0.7.22-1.amzn2023.0.4 | [ALAS2023-2026-1798](https://patchblox.com/security/data/fix/linux/alas2023-2026-1798.md) | Jun 8, 2026 | | Linux | libsolv-debugsource amzn 2023 | 0.7.22-1.amzn2023.0.4 | [ALAS2023-2026-1798](https://patchblox.com/security/data/fix/linux/alas2023-2026-1798.md) | Jun 8, 2026 | | Linux | libsolv-demo amzn 2023 | 0.7.22-1.amzn2023.0.4 | [ALAS2023-2026-1798](https://patchblox.com/security/data/fix/linux/alas2023-2026-1798.md) | Jun 8, 2026 | | Linux | libsolv-demo-debuginfo amzn 2023 | 0.7.22-1.amzn2023.0.4 | [ALAS2023-2026-1798](https://patchblox.com/security/data/fix/linux/alas2023-2026-1798.md) | Jun 8, 2026 | | Linux | libsolv-devel amzn 2023 | 0.7.22-1.amzn2023.0.4 | [ALAS2023-2026-1798](https://patchblox.com/security/data/fix/linux/alas2023-2026-1798.md) | Jun 8, 2026 | | Linux | libsolv-tools amzn 2023 | 0.7.22-1.amzn2023.0.4 | [ALAS2023-2026-1798](https://patchblox.com/security/data/fix/linux/alas2023-2026-1798.md) | Jun 8, 2026 | | Linux | libsolv-tools-debuginfo amzn 2023 | 0.7.22-1.amzn2023.0.4 | [ALAS2023-2026-1798](https://patchblox.com/security/data/fix/linux/alas2023-2026-1798.md) | Jun 8, 2026 | | Linux | libzypp opensuse-leap 16.0 | 17.38.13-160000.1.1 | [OPENSUSE-SU-2026:21096-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21096-1.md) | Jun 19, 2026 | | Linux | libzypp sles 15.6 | 17.38.13-150600.3.92.1 | [SUSE-SU-2026:2590-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2590-1.md) | Jun 23, 2026 | | Linux | libzypp sles 15.7 | 17.38.13-150700.6.13.1 | [SUSE-SU-2026:2531-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2531-1.md) | Jun 23, 2026 | | Linux | libzypp sles 16.0 | 17.38.13-160000.1.1 | [SUSE-SU-2026:22172-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22172-1.md) | Jun 19, 2026 | | Linux | perl-solv amzn 2023 | 0.7.22-1.amzn2023.0.4 | [ALAS2023-2026-1798](https://patchblox.com/security/data/fix/linux/alas2023-2026-1798.md) | Jun 8, 2026 | | Linux | perl-solv-debuginfo amzn 2023 | 0.7.22-1.amzn2023.0.4 | [ALAS2023-2026-1798](https://patchblox.com/security/data/fix/linux/alas2023-2026-1798.md) | Jun 8, 2026 | | Linux | python3-solv amzn 2023 | 0.7.22-1.amzn2023.0.4 | [ALAS2023-2026-1798](https://patchblox.com/security/data/fix/linux/alas2023-2026-1798.md) | Jun 8, 2026 | | Linux | python3-solv-debuginfo amzn 2023 | 0.7.22-1.amzn2023.0.4 | [ALAS2023-2026-1798](https://patchblox.com/security/data/fix/linux/alas2023-2026-1798.md) | Jun 8, 2026 | | Linux | ruby-solv amzn 2023 | 0.7.22-1.amzn2023.0.4 | [ALAS2023-2026-1798](https://patchblox.com/security/data/fix/linux/alas2023-2026-1798.md) | Jun 8, 2026 | | Linux | ruby-solv-debuginfo amzn 2023 | 0.7.22-1.amzn2023.0.4 | [ALAS2023-2026-1798](https://patchblox.com/security/data/fix/linux/alas2023-2026-1798.md) | Jun 8, 2026 | | Linux | zypper opensuse-leap 16.0 | 1.14.98-160000.1.1 | [OPENSUSE-SU-2026:21096-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21096-1.md) | Jun 19, 2026 | | Linux | zypper sles 15.7 | 1.14.98-150700.13.6.1 | [SUSE-SU-2026:2531-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2531-1.md) | Jun 23, 2026 | | Linux | zypper sles 16.0 | 1.14.98-160000.1.1 | [SUSE-SU-2026:22172-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22172-1.md) | Jun 19, 2026 | --- Data as of 2026-11-09T01:18:40Z UTC. 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