{"id":"CVE-2026-102702","aliases":["DEBIAN-CVE-2026-102702","EUVD-2026-98831","GHSA-p4h6-6vf5-jwcw","UBUNTU-CVE-2026-102702"],"status":"published","title":"Arm: multiple issues with GNTTABOP_cache_flush","description":"[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\n1) XSA-437 (CVE-2023-34321) addressed issues with overflows in\n   calculations involved in guests flushing caches through\n   GNTTABOP_cache_flush.  Unfortunately the fix there introduced a\n   calculation which may underflow, resulting in a loop which would - at\n   least on 64-bit Arm - take excessively long, and which would likely\n   eventually crash the hypervisor.\n\n   This is CVE-2026-102699.\n\n2) GNTTABOP_cache_flush may be issued on memory mapped from another\n   domain using the grant table interface.  However there was no\n   restriction to disallow the use of invalidate-without-clean against\n   read-only grant mappings, which may corrupt the granted memory.\n\n   This is CVE-2026-102702.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-09","score":0.00292,"percentile":0.21892,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-191"],"published":"2026-10-13T15:45:13Z","modified":"2026-11-04T23:02:29Z","fixes":[{"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":"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":"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: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"]}],"products":[{"vendor":"xen","product":"xen"}],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-519.html","tags":["report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102702"},{"url":"https://github.com/advisories/GHSA-p4h6-6vf5-jwcw"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-102702","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-102702","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-102702","tags":["report"]},{"url":"https://xenbits.xen.org/xsa/advisory-519.html","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-102702","title":"Arm: multiple issues with GNTTABOP_cache_flush","description":"[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\n1) XSA-437 (CVE-2023-34321) addressed issues with overflows in\n   calculations involved in guests flushing caches through\n   GNTTABOP_cache_flush.  Unfortunately the fix there introduced a\n   calculation which may underflow, resulting in a loop which would - at\n   least on 64-bit Arm - take excessively long, and which would likely\n   eventually crash the hypervisor.\n\n   This is CVE-2026-102699.\n\n2) GNTTABOP_cache_flush may be issued on memory mapped from another\n   domain using the grant table interface.  However there was no\n   restriction to disallow the use of invalidate-without-clean against\n   read-only grant mappings, which may corrupt the granted memory.\n\n   This is CVE-2026-102702.","status":"published","published":"2026-10-13T15:45:13.125Z","modified":"2026-10-20T17:28:13.48Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T13:38:54.394896Z"}],"euvd":[{"id":"EUVD-2026-98831","description":"[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\n1) XSA-437 (CVE-2023-34321) addressed issues with overflows in\n   calculations involved in guests flushing caches through\n   GNTTABOP_cache_flush.  Unfortunately the fix there introduced a\n   calculation which may underflow, resulting in a loop which would - at\n   least on 64-bit Arm - take excessively long, and which would likely\n   eventually crash the hypervisor.\n\n   This is CVE-2026-102699.\n\n2) GNTTABOP_cache_flush may be issued on memory mapped from another\n   domain using the grant table interface.  However there was no\n   restriction to disallow the use of invalidate-without-clean against\n   read-only grant mappings, which may corrupt the granted memory.\n\n   This is CVE-2026-102702.","status":"published","published":"2026-10-13T15:45:13Z","modified":"2026-10-20T17:28:13Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:59:43.600473Z"}],"ghsa":[{"id":"GHSA-p4h6-6vf5-jwcw","title":"[This CNA information record relates to multiple CVEs; the\ntext explains which aspects...","description":"[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\n1) XSA-437 (CVE-2023-34321) addressed issues with overflows in\n   calculations involved in guests flushing caches through\n   GNTTABOP_cache_flush.  Unfortunately the fix there introduced a\n   calculation which may underflow, resulting in a loop which would - at\n   least on 64-bit Arm - take excessively long, and which would likely\n   eventually crash the hypervisor.\n\n   This is CVE-2026-102699.\n\n2) GNTTABOP_cache_flush may be issued on memory mapped from another\n   domain using the grant table interface.  However there was no\n   restriction to disallow the use of invalidate-without-clean against\n   read-only grant mappings, which may corrupt the granted memory.\n\n   This is CVE-2026-102702.","status":"published","published":"2026-10-13T18:30:48Z","modified":"2026-10-20T18:32:36Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T15:14:04.153849Z"}],"nvd":[{"id":"CVE-2026-102702","description":"[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\n1) XSA-437 (CVE-2023-34321) addressed issues with overflows in\n   calculations involved in guests flushing caches through\n   GNTTABOP_cache_flush.  Unfortunately the fix there introduced a\n   calculation which may underflow, resulting in a loop which would - at\n   least on 64-bit Arm - take excessively long, and which would likely\n   eventually crash the hypervisor.\n\n   This is CVE-2026-102699.\n\n2) GNTTABOP_cache_flush may be issued on memory mapped from another\n   domain using the grant table interface.  However there was no\n   restriction to disallow the use of invalidate-without-clean against\n   read-only grant mappings, which may corrupt the granted memory.\n\n   This is CVE-2026-102702.","status":"published","published":"2026-10-13T16:17:09.723Z","modified":"2026-10-20T18:17:16.44Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T14:12:57.132005Z"}],"osv":[{"id":"DEBIAN-CVE-2026-102702","description":"[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]  1) XSA-437 (CVE-2023-34321) addressed issues with overflows in    calculations involved in guests flushing caches through    GNTTABOP_cache_flush.  Unfortunately the fix there introduced a    calculation which may underflow, resulting in a loop which would - at    least on 64-bit Arm - take excessively long, and which would likely    eventually crash the hypervisor.     This is CVE-2026-102699.  2) GNTTABOP_cache_flush may be issued on memory mapped from another    domain using the grant table interface.  However there was no    restriction to disallow the use of invalidate-without-clean against    read-only grant mappings, which may corrupt the granted memory.     This is CVE-2026-102702.","status":"published","published":"2026-10-13T16:17:09.723Z","modified":"2026-11-04T23:02:29.628756226Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-04T23:09:59.08306Z"},{"id":"UBUNTU-CVE-2026-102702","description":"[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] 1) XSA-437 (CVE-2023-34321) addressed issues with overflows in    calculations involved in guests flushing caches through    GNTTABOP_cache_flush.  Unfortunately the fix there introduced a    calculation which may underflow, resulting in a loop which would - at    least on 64-bit Arm - take excessively long, and which would likely    eventually crash the hypervisor.    This is CVE-2026-102699. 2) GNTTABOP_cache_flush may be issued on memory mapped from another    domain using the grant table interface.  However there was no    restriction to disallow the use of invalidate-without-clean against    read-only grant mappings, which may corrupt the granted memory.    This is CVE-2026-102702.","status":"published","published":"2026-10-13T16:17:00Z","modified":"2026-10-28T17:50:29Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:55:58.519486Z"}]}}