{"id":"CVE-2026-79610","aliases":["ALPINE-CVE-2026-79610","DEBIAN-CVE-2026-79610","EUVD-2026-98827","GHSA-mm4r-fcq9-pfr4","SUSE-SU-2026:4641-1","SUSE-SU-2026:4642-1","SUSE-SU-2026:4732-1","SUSE-SU-2026:4942-1","SUSE-SU-2026:5140-1","UBUNTU-CVE-2026-79610","openSUSE-SU-2026:12138-1"],"status":"published","title":"grant-table: double version change race","description":"XSA-501 was about issues with v1 -\u003e v2 and v2 -\u003e v1 changes racing certain\nother grant table operations.  Sadly a v2 -\u003e v1 -\u003e v2 change has yet\nanother effect which wasn't accounted for: During the first change, status\npages would be freed.  During the second change they would be allocated\nagain.  Hence across the full pair of change the addresses of the status\npages may change, rendering stale previously calculated pointers into the\nstatus array.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.00148,"percentile":0.04031,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-362"],"published":"2026-10-13T13:09:06Z","modified":"2026-11-10T13:15:07Z","fixes":[{"ecosystem":"Alpine:v3.21","package":"xen","fixed_in":["4.19.6-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"xen","fixed_in":["4.20.4-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"xen","fixed_in":["4.20.4-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"xen","fixed_in":["4.21.2-r2"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"xen","fixed_in":["4.17.7+13-g2445b30a44-0+deb12u1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"xen","fixed_in":["4.20.4+39-gf1e1321c87-0+deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"xen","fixed_in":["4.20.4+39-gf1e1321c87-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.21","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.19.6-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.20.4-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.20.4-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.21.2-r2"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.17.7+13-g2445b30a44-0+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","4.17.7-0+deb12u1"]},{"source":"osv","ecosystem":"Debian:13","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.20.4+39-gf1e1321c87-0+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","4.20.3+127-gc42374a105-0+deb13u1","4.20.3+127-gc42374a105-1"]},{"source":"osv","ecosystem":"Debian:14","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.20.4+39-gf1e1321c87-1"}]}],"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","4.20.3+127-gc42374a105-1"]},{"source":"osv","ecosystem":"SUSE:Linux 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"title":"grant-table: double version change race","description":"XSA-501 was about issues with v1 -\u003e v2 and v2 -\u003e v1 changes racing certain\nother grant table operations.  Sadly a v2 -\u003e v1 -\u003e v2 change has yet\nanother effect which wasn't accounted for: During the first change, status\npages would be freed.  During the second change they would be allocated\nagain.  Hence across the full pair of change the addresses of the status\npages may change, rendering stale previously calculated pointers into the\nstatus array.","status":"published","published":"2026-10-13T15:44:42.37Z","modified":"2026-10-20T17:33:21.929Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T13:50:27.582139Z"}],"euvd":[{"id":"EUVD-2026-98827","description":"XSA-501 was about issues with v1 -\u003e v2 and v2 -\u003e v1 changes racing certain\nother grant table operations.  Sadly a v2 -\u003e v1 -\u003e v2 change has yet\nanother effect which wasn't accounted for: During the first change, status\npages would be freed.  During the second change they would be allocated\nagain.  Hence across the full pair of change the addresses of the status\npages may change, rendering stale previously calculated pointers into the\nstatus array.","status":"published","published":"2026-10-13T15:44:42Z","modified":"2026-10-20T17:33:21Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:59:43.600473Z"}],"ghsa":[{"id":"GHSA-mm4r-fcq9-pfr4","title":"XSA-501 was about issues with v1 -\u003e v2 and v2 -\u003e v1 changes racing certain\nother grant table...","description":"XSA-501 was about issues with v1 -\u003e v2 and v2 -\u003e v1 changes racing certain\nother grant table operations.  Sadly a v2 -\u003e v1 -\u003e v2 change has yet\nanother effect which wasn't accounted for: During the first change, status\npages would be freed.  During the second change they would be allocated\nagain.  Hence across the full pair of change the addresses of the status\npages may change, rendering stale previously calculated pointers into the\nstatus array.","status":"published","published":"2026-10-13T18:30:52Z","modified":"2026-10-20T18:32:36Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T15:14:04.153849Z"}],"nvd":[{"id":"CVE-2026-79610","description":"XSA-501 was about issues with v1 -\u003e v2 and v2 -\u003e v1 changes racing certain\nother grant table operations.  Sadly a v2 -\u003e v1 -\u003e v2 change has yet\nanother effect which wasn't accounted for: During the first change, status\npages would be freed.  During the second change they would be allocated\nagain.  Hence across the full pair of change the addresses of the status\npages may change, rendering stale previously calculated pointers into the\nstatus array.","status":"published","published":"2026-10-13T16:17:23.247Z","modified":"2026-10-20T18:17:22.29Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:12:57.132005Z"}],"osv":[{"id":"ALPINE-CVE-2026-79610","description":"XSA-501 was about issues with v1 -\u003e v2 and v2 -\u003e v1 changes racing certain\nother grant table operations.  Sadly a v2 -\u003e v1 -\u003e v2 change has yet\nanother effect which wasn't accounted for: During the first change, status\npages would be freed.  During the second change they would be allocated\nagain.  Hence across the full pair of change the addresses of the status\npages may change, rendering stale previously calculated pointers into the\nstatus array.","status":"published","published":"2026-10-13T16:17:23.247Z","modified":"2026-10-23T18:30:03.19466448Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:27:50.764331Z"},{"id":"DEBIAN-CVE-2026-79610","description":"XSA-501 was about issues with v1 -\u003e v2 and v2 -\u003e v1 changes racing certain other grant table operations.  Sadly a v2 -\u003e v1 -\u003e v2 change has yet another effect which wasn't accounted for: During the first change, status pages would be freed.  During the second change they would be allocated again.  Hence across the full pair of change the addresses of the status pages may change, rendering stale previously calculated pointers into the status array.","status":"published","published":"2026-10-13T16:17:23.247Z","modified":"2026-11-04T23:02:29.559059458Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-04T23:09:59.08306Z"},{"id":"UBUNTU-CVE-2026-79610","description":"XSA-501 was about issues with v1 -\u003e v2 and v2 -\u003e v1 changes racing certain other grant table operations.  Sadly a v2 -\u003e v1 -\u003e v2 change has yet another effect which wasn't accounted for: During the first change, status pages would be freed.  During the second change they would be allocated again.  Hence across the full pair of change the addresses of the status pages may change, rendering stale previously calculated pointers into the status array.","status":"published","published":"2026-10-13T16:17:00Z","modified":"2026-10-28T17:42:51Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:57:18.015985Z"},{"id":"openSUSE-SU-2026:12138-1","title":"xen-4.22.0_06-1.1 on GA media","description":"These are all security issues fixed in the xen-4.22.0_06-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-10-14T00:00:00Z","modified":"2026-10-15T17:23:13.673055893Z","updated_at":"2026-11-02T16:58:40.245664Z"},{"id":"SUSE-SU-2026:4641-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2026-79609: x86: XPTI may break on huge-memory systems (bsc#1283321).\n- CVE-2026-79610: grant-table: double version change race (bsc#1283322).\n- CVE-2026-79611: VMX: VMentry failure with branch tracing and blocked states (bsc#1283323).\n- CVE-2026-102700: gnttab: cache-flush handling may cause page reference leak (bsc#1283325).\n\nNon security issue fixed:\n\n- Xen: Missing upstream bug fixes (bsc#1027519).\n\n","status":"published","published":"2026-10-13T13:09:06Z","modified":"2026-10-14T17:30:07.611349803Z","updated_at":"2026-11-02T15:54:05.838224Z"},{"id":"SUSE-SU-2026:4642-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2026-79609: x86: XPTI may break on huge-memory systems (bsc#1283321).\n- CVE-2026-79610: grant-table: double version change race (bsc#1283322).\n- CVE-2026-79611: VMX: VMentry failure with branch tracing and blocked states (bsc#1283323).\n- CVE-2026-102700: gnttab: cache-flush handling may cause page reference leak (bsc#1283325).\n","status":"published","published":"2026-10-13T13:09:35Z","modified":"2026-10-14T17:30:07.606902014Z","updated_at":"2026-11-02T15:54:05.838224Z"},{"id":"SUSE-SU-2026:4732-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2026-79609: x86: XPTI may break on huge-memory systems (bsc#1283321).\n- CVE-2026-79610: grant-table: double version change race (bsc#1283322).\n- CVE-2026-79611: VMX: VMentry failure with branch tracing and blocked states (bsc#1283323).\n- CVE-2026-102700: gnttab: cache-flush handling may cause page reference leak (bsc#1283325).\n","status":"published","published":"2026-10-19T07:15:05Z","modified":"2026-10-20T17:24:00.3463403Z","updated_at":"2026-11-02T15:54:05.838224Z"},{"id":"SUSE-SU-2026:4942-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2026-79608: x86/AMD: ineffectual Zenbleed workaround (bsc#1283317).\n- CVE-2026-79609: x86: XPTI may break on huge-memory systems (bsc#1283321).\n- CVE-2026-79610: grant-table: double version change race (bsc#1283322).\n- CVE-2026-79611: VMX: VMentry failure with branch tracing and blocked states (bsc#1283323).\n- CVE-2026-102700: gnttab: cache-flush handling may cause page reference leak (bsc#1283325).\n","status":"published","published":"2026-10-29T16:29:02Z","modified":"2026-10-31T18:00:03.930410439Z","updated_at":"2026-11-02T15:54:05.838224Z"},{"id":"SUSE-SU-2026:5140-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2026-62437: x86: DMs may cause mem leak by IRQ binding (bsc#1276838).\n- CVE-2026-79602: x86: improper handling of HVM emulation return codes (bsc#1276839).\n- CVE-2026-79603: unconditionally do TLB flushing ahead of page scrubbing (bsc#1276841).\n- CVE-2026-79609: x86: XPTI may break on huge-memory systems (bsc#1283321).\n- CVE-2026-79610: grant-table: double version change race (bsc#1283322).\n- CVE-2026-79611: VMX: VMentry failure with branch tracing and blocked states (bsc#1283323).\n- CVE-2026-102700: gnttab: cache-flush handling may cause page reference leak (bsc#1283325).\n- CVE-2026-102703,CVE-2026-102704: arbitrary read/write via grant copy (bsc#1288663).\n\nNon security issue fixed:\n\n- Update to Xen 4.18.6 security bug fix release (bsc#1027519).\n","status":"published","published":"2026-11-09T13:24:47Z","modified":"2026-11-10T13:15:07.782924083Z","updated_at":"2026-11-10T13:29:51.103746Z"}]}}