CVE-2026-23558

The adjustments made for XSA-379 as well as those subsequently becoming XSA-387 still left a race window, when a HVM or PVH guest does a grant table version change from v2 to v1 in parallel with mapping the status pages via XENMEMaddtophysmap. Some of the status pages may then be freed while...

CVE-2026-23558

The adjustments made for XSA-379 as well as those subsequently becoming XSA-387 still left a race window, when a HVM or PVH guest does a grant table version change from v2 to v1 in parallel with mapping the status pages via XENMEMaddtophysmap. Some of the status pages may then be freed while...

CVE-2026-23558

CVE-2026-23558 describes a grant table v2 race in status page mapping for the Xen hypervisor. In XSA-379/387 scenarios, when a HVM/PVH guest changes grant table version from v2 to v1 while XENMEM_add_to_physmap maps status pages, some status pages may be freed even as their mappings are still ins...

Fedora 42 : xen (2026-0c9aff64a5)

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-0c9aff64a5 advisory. oxenstored keeps quota related use counts across domain destruction XSA-483, CVE-2026-23556 Xenstored DoS via XSRESETWATCHES command XSA-484,...

SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2026:1743-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1743-1 advisory. - Update to Xen 4.20.3 bug fix release bsc1027519 jscPED-8907. - CVE-2025-54505: Floating Point Divider State...

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...

SUSE-SU-2026:1743-1 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...

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-2026:1692-1 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...

Fedora 44 : xen (2026-883e88db68)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-883e88db68 advisory. oxenstored keeps quota related use counts across domain destruction XSA-483, CVE-2026-23556 Xenstored DoS via XSRESETWATCHES command XSA-484,...

SUSE SLES15 Security Update : xen (SUSE-SU-2026:1657-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1657-1 advisory. - CVE-2025-54505: floating point divider state sampling on AMD CPUs AMD-SN-7053 bsc1262428. - CVE-2026-23557: Xenstored DoS via...

Fedora 43 : xen (2026-78cd69d9ae)

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-78cd69d9ae advisory. oxenstored keeps quota related use counts across domain destruction XSA-483, CVE-2026-23556 Xenstored DoS via XSRESETWATCHES command XSA-484,...

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-2026:1657-1 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...

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...

grant table v2 race in status page mapping

ISSUE DESCRIPTION The adjustments made for XSA-379 as well as those subsequently becoming XSA-387 still left a race window, when a HVM or PVH guest does a grant table version change from v2 to v1 in parallel with mapping the status pages via XENMEMaddtophysmap. Some of the status pages may then b...

PT-2026-35872

Name of the Vulnerable Software and Affected Versions xen affected versions not specified Description Security issues were identified and addressed in the xen-4.21.1 04-1.1 package on the GA media of openSUSE Tumbleweed. Recommendations Update to the xen-4.21.1 04-1.1 package...

PT-2026-35873

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A buffer overflow exists in the drivers/xen/sys-hypervisor.c file. The build ID returned by the HYPERVISOR xen versionXENVER build id function is not a string and lacks NUL termination...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-001712)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001712 advisory. Linux PV device frontends vulnerable to attacks by backends This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities...