CVE-2026-23557

Any guest can cause xenstored to crash by issuing a XSRESETWATCHES command within a transaction due to an assert triggering. In case xenstored was built with NDEBUG defined nothing bad will happen, as assert is doing nothing in this case. Note that the default is not to define NDEBUG for xenstore...

Security update for xen

This update for xen fixes the following issues: Update to Xen 4.20.3 bug fix release bsc1027519 jscPED-8907. CVE-2025-54505: Floating Point Divider State Sampling on AMD CPUs AMD-SN-7053 bsc1262428. CVE-2026-23557: Xenstored DoS via XSRESETWATCHES command bsc1262178. CVE-2026-23558: grant table v...

Security update for xen

This update for xen fixes the following issues: CVE-2025-54505: floating point divider state sampling on AMD CPUs AMD-SN-7053 bsc1262428. CVE-2026-23557: Xenstored DoS via XSRESETWATCHES command bsc1262178. CVE-2026-23558: grant table v2 race in status page mapping bsc1262180. Special Instruction...

SUSE-SU-2026:1645-1 Security update for xen

This update for xen fixes the following issues: - CVE-2025-54505: floating point divider state sampling on AMD CPUs AMD-SN-7053 bsc1262428. - CVE-2026-23557: Xenstored DoS via XSRESETWATCHES command bsc1262178. - CVE-2026-23558: grant table v2 race in status page mapping bsc1262180...

PT-2020-6150

Name of the Vulnerable Software and Affected Versions Xen versions 4.6 through 4.14.x Description An issue was discovered when acting upon a guest XS RESET WATCHES request, where not all tracking information is freed. This can cause unbounded memory usage in oxenstored, leading to a system-wide...