{"id":"CVE-2026-10635","revision":null,"records":[{"revision":"5630474f61984772a161286eeac410aa","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-10635","aliases":[],"title":"Dangling memory-domain pointer (use-after-free) in Xtensa MMU page-table code on memory-domain de-init","description":"On Xtensa targets with CONFIG_USERSPACE and CONFIG_XTENSA_MMU, the page-table code (arch/xtensa/core/ptables.c) maintains a global list, xtensa_domain_list, of active memory domains using a list node embedded inside the caller-owned struct k_mem_domain. When a domain is destroyed via k_mem_domain_deinit() -> arch_mem_domain_deinit(), the page tables are torn down and domain->arch.ptables is set to NULL, but the domain's node was not removed from xtensa_domain_list. The freed/deinitialized domain therefore remained linked into the global list as a dangling pointer into caller-owned storage that may then be freed or reused.\n\nAny subsequent arch_mem_map()/arch_mem_unmap() operation (widely invoked by kernel memory-mapping and demand-paging code) traverses the stale node and dereferences domain->ptables: at minimum a NULL pointer dereference causing a fatal MMU exception (denial of service), and if the k_mem_domain storage has been freed or reused, a use-after-free in which a stale/controlled ptables value is dereferenced and written through during the page-table walk (l2_page_table_map writes l1_table[...] and l2_table[...], and xtensa_mmu_compute_domain_regs writes into the domain struct and the L1 table), yielding page-table memory corruption that can undermine userspace isolation.\n\nThe vulnerable path is reachable only from privileged kernel/supervisor code (k_mem_domain_deinit is not a syscall), not directly from unprivileged user threads or remotely. Affected: Zephyr v4.4.0 (the Xtensa memory-domain de-initialization feature was introduced in commit 3032b58f52d and first shipped in v4.4.0); fixed on main by adding sys_slist_find_and_remove() in arch_mem_domain_deinit(). The Xtensa MPU path is unaffected.","state":0,"publishedAt":"2026-06-16T05:19:20.487+00:00","modifiedAt":"2026-10-15T22:10:00.085+00:00","affected":[{"ecosystem":"https://github.com/zephyrproject-rtos/zephyr","name":"zephyr","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"collectionURL\": \"https://github.com/zephyrproject-rtos/zephyr\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageName\": \"zephyr\",\n                    \"product\": \"zephyr\",\n                    \"programFiles\": [\n                        \"arch/xtensa/core/ptables.c\"\n                    ],\n                    \"vendor\": \"zephyrproject\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"4.4.2\",\n                            \"status\": \"affected\",\n                            \"version\": \"4.4.0\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H","score":6.3,"severity":"MEDIUM"}],"references":["https://github.com/zephyrproject-rtos/zephyr/commit/33d43d09337119fc6084b4ab545f9267839973f6","https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-39v7-cx8j-gq82"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-10635","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-10635","identifiers":["CVE-2026-10635"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-09T12:02:21.9910047+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-09T12:02:21.9910047+00:00","lastSuccessAt":"2026-11-09T12:02:22.1773794+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:22.1773831+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-24e6fde7b744113daefb8f6135035fb8a5c69c9617c9c0d40574a0376532ffd3-bc5670b92e6417137e6d98178f734a585c0efdac3c24cdab996a156ba398735b","complete":true,"records":421397,"lastAttemptAt":"2026-11-09T12:02:16.4943065+00:00","lastSuccessAt":"2026-11-09T12:02:16.4102763+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:16.4943065+00:00","snapshotPublishedAt":"2026-11-09T11:21:04+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-50dd0d1673454400857cbec5f458a98f","complete":false,"records":13655,"lastAttemptAt":"2026-11-09T12:06:24.0387278+00:00","lastSuccessAt":"2026-11-09T12:06:24.0983949+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:06:24.0983949+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-09T12:02:21.9910047+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T12:02:21.9910047+00:00","lastSuccessAt":"2026-11-09T12:02:22.1781502+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:22.1781508+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-44231a3c29e84c64b271bb4e9b8f3678","complete":true,"records":13667,"lastAttemptAt":"2026-11-09T12:02:23.2886601+00:00","lastSuccessAt":"2026-11-09T12:02:23.284+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:23.284+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13707,"expectedIdentifiers":13707,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-980593e6977a6d1b4fb1eed5a1ffe88a468736f89f0a06f710924ad59132c023","complete":true,"records":9914,"lastAttemptAt":"2026-11-09T12:02:17.2599038+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:17.2599038+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-09T12:02:16.7165115+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:16.7165115+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-c905fa1bd26c7b261e77cc7202a86dc766ff31c2b096b501f3bf44f561e34970","complete":true,"records":3063,"lastAttemptAt":"2026-11-09T12:02:21.9559708+00:00","lastSuccessAt":"2026-11-09T12:02:21.7931207+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:21.9559708+00:00","snapshotPublishedAt":"2026-11-09T11:18:00+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-e6e6ac3eaece246ff08884368fe1dc99d4d393571e77c126c8f4d38d66697688","complete":true,"records":231297,"lastAttemptAt":"2026-11-09T12:02:17.0901763+00:00","lastSuccessAt":"2026-11-09T10:04:27.0059369+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:17.0901763+00:00","snapshotPublishedAt":"2026-11-09T09:33:10+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}