{"id":"CVE-2026-23558","aliases":["ALPINE-CVE-2026-23558","DEBIAN-CVE-2026-23558","EUVD-2026-30928","GHSA-4qf9-g5cf-cx9j","SUSE-SU-2026:1645-1","SUSE-SU-2026:1657-1","SUSE-SU-2026:1692-1","SUSE-SU-2026:1743-1","SUSE-SU-2026:1998-1","SUSE-SU-2026:2066-1","SUSE-SU-2026:2102-1","UBUNTU-CVE-2026-23558","openSUSE-SU-2026:10660-1"],"status":"published","title":"grant table v2 race in status page mapping","description":"The adjustments made for XSA-379 as well as those subsequently becoming\nXSA-387 still left a race window, when a HVM or PVH guest does a grant\ntable version change from v2 to v1 in parallel with mapping the status\npage(s) via XENMEM_add_to_physmap.  Some of the status pages may then be\nfreed while mappings of them would still be inserted into the guest's\nsecondary (P2M) page tables.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.00117,"percentile":0.01701,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-362"],"published":"2026-04-28T14:46:52Z","modified":"2026-10-17T12:58:07Z","fixes":[{"ecosystem":"Alpine:v3.20","package":"xen","fixed_in":["4.18.5-r7"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"xen","fixed_in":["4.19.5-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"xen","fixed_in":["4.20.3-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"xen","fixed_in":["4.20.3-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"xen","fixed_in":["4.21.1-r3"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"xen","fixed_in":["4.17.7-0+deb12u1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"xen","fixed_in":["4.20.3+127-gc42374a105-0+deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"xen","fixed_in":["4.20.3+127-gc42374a105-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.20","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.18.5-r7"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.19.5-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.20.3-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.20.3-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.21.1-r3"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.17.7-0+deb12u1"}]}],"versions":["4.17.1+2-gb773c48e36-1","4.17.2+55-g0b56bed864-1","4.17.2+76-ge1f9cb16e2-1","4.17.2+76-ge1f9cb16e2-1~deb12u1","4.17.2-1","4.17.3+10-g091466ba55-1","4.17.3+10-g091466ba55-1.1","4.17.3+10-g091466ba55-1.1~exp1","4.17.3+10-g091466ba55-1.1~exp2","4.17.3+10-g091466ba55-1~deb12u1","4.17.3+36-g54dacb5c02-1","4.17.5+23-ga4e5191dc0-1","4.17.5+23-ga4e5191dc0-1+deb12u1","4.17.5+72-g01140da4e8-1"]},{"source":"osv","ecosystem":"Debian:13","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.20.3+127-gc42374a105-0+deb13u1"}]}],"versions":["4.20.0+68-g35cb38b222-1","4.20.2+37-g61ff35323e-0+deb13u1","4.20.2+37-g61ff35323e-1","4.20.2+7-g1badcf5035-0+deb13u1","4.20.2+7-g1badcf5035-1","4.20.2+7-g1badcf5035-2"]},{"source":"osv","ecosystem":"Debian:14","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.20.3+127-gc42374a105-1"}]}],"versions":["4.20.0+68-g35cb38b222-1","4.20.2+37-g61ff35323e-1","4.20.2+7-g1badcf5035-1","4.20.2+7-g1badcf5035-2"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.5.1-0ubuntu1","4.5.1-0ubuntu2","4.6.0-1ubuntu1","4.6.0-1ubuntu2","4.6.0-1ubuntu4","4.6.0-1ubuntu4.1","4.6.0-1ubuntu4.2","4.6.0-1ubuntu4.3","4.6.5-0ubuntu1","4.6.5-0ubuntu1.1","4.6.5-0ubuntu1.2","4.6.5-0ubuntu1.4"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.9.0-0ubuntu3","4.9.0-0ubuntu4","4.9.2-0ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.9.2-0ubuntu2","4.9.2-0ubuntu6","4.9.2-0ubuntu7","4.11.3+24-g14b62ab3e5-1ubuntu1","4.11.3+24-g14b62ab3e5-1ubuntu2","4.11.3+24-g14b62ab3e5-1ubuntu2.2","4.11.3+24-g14b62ab3e5-1ubuntu2.3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.11.4+24-gddaaccbbab-1ubuntu2","4.16.0-1~ubuntu2","4.16.0-1~ubuntu2.1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.17.2-1","4.17.2+55-g0b56bed864-1","4.17.2+76-ge1f9cb16e2-1","4.17.2+76-ge1f9cb16e2-1ubuntu1","4.17.3+10-g091466ba55-1","4.17.3+10-g091466ba55-1.1ubuntu2","4.17.3+10-g091466ba55-1.1ubuntu3"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.20.0-1ubuntu1","4.20.0+68-g35cb38b222-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.20.2+7-g1badcf5035-2build2","4.20.2+37-g61ff35323e-1ubuntu1","4.20.3+127-gc42374a105-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.20.0+68-g35cb38b222-1","4.20.2+7-g1badcf5035-2","4.20.2+7-g1badcf5035-2build2"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.21.1_04-1.1"}]}],"bundled":2}],"products":[{"vendor":"xen","product":"xen"}],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-486.html","tags":["Mitigation","Patch","Vendor Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2026/04/28/13","tags":["Mailing List","Mitigation","Patch","Third Party Advisory"]},{"url":"http://xenbits.xen.org/xsa/advisory-486.html","tags":["Mitigation","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23558"},{"url":"https://github.com/advisories/GHSA-4qf9-g5cf-cx9j"},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-23558","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-23558","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20261645-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1262178","tags":["report"]},{"url":"https://bugzilla.suse.com/1262180","tags":["report"]},{"url":"https://bugzilla.suse.com/1262428","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2025-54505","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-23557","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-23558","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20261657-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20261692-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20261743-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1027519","tags":["report"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20261998-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1264066","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2025-54518","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20262066-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20262102-1/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-23558","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-23558","tags":["report"]},{"url":"https://xenbits.xen.org/xsa/advisory-486.html","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-23558","title":"grant table v2 race in status page mapping","description":"The adjustments made for XSA-379 as well as those subsequently becoming\nXSA-387 still left a race window, when a HVM or PVH guest does a grant\ntable version change from v2 to v1 in parallel with mapping the status\npage(s) via XENMEM_add_to_physmap.  Some of the status pages may then be\nfreed while mappings of them would still be inserted into the guest's\nsecondary (P2M) page tables.","status":"published","published":"2026-05-19T12:49:54.652Z","modified":"2026-05-20T03:55:35.327Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T13:42:15.603999Z"}],"euvd":[{"id":"EUVD-2026-30928","description":"The adjustments made for XSA-379 as well as those subsequently becoming\nXSA-387 still left a race window, when a HVM or PVH guest does a grant\ntable version change from v2 to v1 in parallel with mapping the status\npage(s) via XENMEM_add_to_physmap.  Some of the status pages may then be\nfreed while mappings of them would still be inserted into the guest's\nsecondary (P2M) page tables.","status":"published","published":"2026-05-19T12:49:54Z","modified":"2026-05-20T03:55:35Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:21:15.217097Z"}],"ghsa":[{"id":"GHSA-4qf9-g5cf-cx9j","title":"The adjustments made for XSA-379 as well as those subsequently becoming\nXSA-387 still left a race...","description":"The adjustments made for XSA-379 as well as those subsequently becoming\nXSA-387 still left a race window, when a HVM or PVH guest does a grant\ntable version change from v2 to v1 in parallel with mapping the status\npage(s) via XENMEM_add_to_physmap.  Some of the status pages may then be\nfreed while mappings of them would still be inserted into the guest's\nsecondary (P2M) page tables.","status":"published","published":"2026-05-19T15:31:29Z","modified":"2026-05-19T18:33:14Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T15:08:12.634242Z"}],"nvd":[{"id":"CVE-2026-23558","description":"The adjustments made for XSA-379 as well as those subsequently becoming\nXSA-387 still left a race window, when a HVM or PVH guest does a grant\ntable version change from v2 to v1 in parallel with mapping the status\npage(s) via XENMEM_add_to_physmap.  Some of the status pages may then be\nfreed while mappings of them would still be inserted into the guest's\nsecondary (P2M) page tables.","status":"published","published":"2026-05-19T14:16:38.96Z","modified":"2026-10-14T20:10:00.19Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:12:19.752984Z"}],"osv":[{"id":"ALPINE-CVE-2026-23558","description":"The adjustments made for XSA-379 as well as those subsequently becoming\nXSA-387 still left a race window, when a HVM or PVH guest does a grant\ntable version change from v2 to v1 in parallel with mapping the status\npage(s) via XENMEM_add_to_physmap.  Some of the status pages may then be\nfreed while mappings of them would still be inserted into the guest's\nsecondary (P2M) page tables.","status":"published","published":"2026-05-19T14:16:38.96Z","modified":"2026-10-01T02:17:49.212134171Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:27:50.269992Z"},{"id":"DEBIAN-CVE-2026-23558","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 page(s) via XENMEM_add_to_physmap.  Some of the status pages may then be freed while mappings of them would still be inserted into the guest's secondary (P2M) page tables.","status":"published","published":"2026-05-19T14:16:38.96Z","modified":"2026-10-15T09:47:40.701504705Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:53.516942Z"},{"id":"UBUNTU-CVE-2026-23558","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 page(s) via XENMEM_add_to_physmap.  Some of the status pages may then be freed while mappings of them would still be inserted into the guest's secondary (P2M) page tables.","status":"published","published":"2026-05-19T14:16:00Z","modified":"2026-10-17T12:58:07.191237523Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:04.456047Z"},{"id":"openSUSE-SU-2026:10660-1","title":"xen-4.21.1_04-1.1 on GA media","description":"These are all security issues fixed in the xen-4.21.1_04-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-04-29T00:00:00Z","modified":"2026-04-30T08:15:34.786695Z","updated_at":"2026-11-02T16:58:38.415593Z"},{"id":"SUSE-SU-2026:1645-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2025-54505: floating point divider state sampling on AMD CPUs AMD-SN-7053 (bsc#1262428).\n- CVE-2026-23557: Xenstored DoS via XS_RESET_WATCHES command (bsc#1262178).\n- CVE-2026-23558: grant table v2 race in status page mapping (bsc#1262180).\n","status":"published","published":"2026-04-28T14:46:52Z","modified":"2026-04-29T08:01:00.141129Z","updated_at":"2026-11-02T15:54:01.610851Z"},{"id":"SUSE-SU-2026:1657-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2025-54505: floating point divider state sampling on AMD CPUs AMD-SN-7053 (bsc#1262428).\n- CVE-2026-23557: Xenstored DoS via XS_RESET_WATCHES command (bsc#1262178).\n- CVE-2026-23558: grant table v2 race in status page mapping (bsc#1262180).\n","status":"published","published":"2026-04-29T11:06:54Z","modified":"2026-04-30T08:16:10.457563Z","updated_at":"2026-11-02T15:54:01.610851Z"},{"id":"SUSE-SU-2026:1692-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2025-54505: Floating Point Divider State Sampling on AMD CPUs AMD-SN-7053 (bsc#1262428).\n- CVE-2026-23557: Xenstored DoS via XS_RESET_WATCHES command (bsc#1262178).\n- CVE-2026-23558: grant table v2 race in status page mapping (bsc#1262180).\n","status":"published","published":"2026-05-05T08:03:58Z","modified":"2026-05-06T08:00:07.285522Z","updated_at":"2026-11-02T15:54:01.610851Z"},{"id":"SUSE-SU-2026:1743-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- Update to Xen 4.20.3 bug fix release (bsc#1027519) (jsc#PED-8907).\n- CVE-2025-54505: Floating Point Divider State Sampling on AMD CPUs AMD-SN-7053 (bsc#1262428).\n- CVE-2026-23557: Xenstored DoS via XS_RESET_WATCHES command (bsc#1262178).\n- CVE-2026-23558: grant table v2 race in status page mapping (bsc#1262180).\n","status":"published","published":"2026-05-07T07:15:57Z","modified":"2026-05-08T08:15:40.023501Z","updated_at":"2026-11-02T15:54:01.610851Z"},{"id":"SUSE-SU-2026:1998-1","title":"Security update for xen","description":"This update for xen fixes the following issue\n\n- CVE-2025-54518: AMD-SN-7052: CPU OP Cache Corruption (bsc#1264066).\n\n","status":"published","published":"2026-05-19T07:10:39Z","modified":"2026-05-20T08:00:07.282572794Z","updated_at":"2026-11-02T15:54:01.610851Z"},{"id":"SUSE-SU-2026:2066-1","title":"Security update for xen","description":"This update for xen fixes the following issues\n\n- CVE-2025-54505: Floating Point Divider State Sampling on AMD CPUs AMD-SN-7053 (bsc#1262428).\n- CVE-2025-54518: AMD-SN-7052: CPU OP Cache Corruption (bsc#1264066).\n- CVE-2026-23557: Xenstored DoS via XS_RESET_WATCHES command (bsc#1262178).\n- CVE-2026-23558: grant table v2 race in status page mapping (bsc#1262180).\n","status":"published","published":"2026-05-26T07:28:44Z","modified":"2026-05-27T08:15:04.596887591Z","updated_at":"2026-11-02T15:54:01.953589Z"},{"id":"SUSE-SU-2026:2102-1","title":"Security update for xen","description":"This update for xen fixes the following issues\n\n- CVE-2025-54505: Floating Point Divider State Sampling on AMD CPUs AMD-SN-7053 (bsc#1262428).\n- CVE-2025-54518: AMD-SN-7052: CPU OP Cache Corruption (bsc#1264066).\n- CVE-2026-23557: Xenstored DoS via XS_RESET_WATCHES command (bsc#1262178).\n- CVE-2026-23558: grant table v2 race in status page mapping (bsc#1262180).\n","status":"published","published":"2026-05-28T07:14:06Z","modified":"2026-05-29T08:15:05.019775264Z","updated_at":"2026-11-02T15:54:02.312556Z"}]}}