{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2021-46959", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-46959", "idYear": 2021, "status": "PUBLISHED", "publishedAt": "2024-02-29T22:31:12.304Z", "updatedAt": "2026-05-23T15:18:46.554Z", "importedAt": "2026-10-24T01:56:36.661Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "spi: Fix use-after-free with devm_spi_alloc_*", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: Fix use-after-free with devm_spi_alloc_*\n\nWe can't rely on the contents of the devres list during\nspi_unregister_controller(), as the list is already torn down at the\ntime we perform devres_find() for devm_spi_release_controller. This\ncauses devices registered with devm_spi_alloc_{master,slave}() to be\nmistakenly identified as legacy, non-devm managed devices and have their\nreference counters decremented below 0.\n\n------------[ cut here ]------------\nWARNING: CPU: 1 PID: 660 at lib/refcount.c:28 refcount_warn_saturate+0x108/0x174\n[] (refcount_warn_saturate) from [] (kobject_put+0x90/0x98)\n[] (kobject_put) from [] (put_device+0x20/0x24)\n r4:b6700140\n[] (put_device) from [] (devm_spi_release_controller+0x3c/0x40)\n[] (devm_spi_release_controller) from [] (release_nodes+0x84/0xc4)\n r5:b6700180 r4:b6700100\n[] (release_nodes) from [] (devres_release_all+0x5c/0x60)\n r8:b1638c54 r7:b117ad94 r6:b1638c10 r5:b117ad94 r4:b163dc10\n[] (devres_release_all) from [] (__device_release_driver+0x144/0x1ec)\n r5:b117ad94 r4:b163dc10\n[] (__device_release_driver) from [] (device_driver_detach+0x84/0xa0)\n r9:00000000 r8:00000000 r7:b117ad94 r6:b163dc54 r5:b1638c10 r4:b163dc10\n[] (device_driver_detach) from [] (unbind_store+0xe4/0xf8)\n\nInstead, determine the devm allocation state as a flag on the\ncontroller which is guaranteed to be stable during cleanup.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "a4add022c1552b0d51a0b89a4781919d6ebac4f9", "status": "affected", "versionType": "git", "lessThan": "62bb2c7f2411a0045c24831f11ecacfc35610815" }, { "version": "0870525cf94bc27907e94ce99afb6d7239ffd2f5", "status": "affected", "versionType": "git", "lessThan": "8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e" }, { "version": "8c45a1c6c951bbe7f95db78fcab46f7337364468", "status": "affected", "versionType": "git", "lessThan": "8e029707f50a82c53172359c686b2536ab54e58c" }, { "version": "234b432c7b6184b2d6c5ba2c55f0dd5023c0edf0", "status": "affected", "versionType": "git", "lessThan": "28a5529068c51cdf0295ab1e11a99a3a909a03e4" }, { "version": "3e04a4976addbedcad326f47b0dd4efc570a1fac", "status": "affected", "versionType": "git", "lessThan": "001c8e83646ad3b847b18f6ac55a54367d917d74" }, { "version": "5e844cc37a5cbaa460e68f9a989d321d63088a89", "status": "affected", "versionType": "git", "lessThan": "c7fabe372a9031acd00498bc718ce27c253abfd1" }, { "version": "5e844cc37a5cbaa460e68f9a989d321d63088a89", "status": "affected", "versionType": "git", "lessThan": "cee78aa24578edac8cf00513dca618c0acc17cd7" }, { "version": "5e844cc37a5cbaa460e68f9a989d321d63088a89", "status": "affected", "versionType": "git", "lessThan": "8735248ebb918d25427965f0db07939ed0473ec6" }, { "version": "5e844cc37a5cbaa460e68f9a989d321d63088a89", "status": "affected", "versionType": "git", "lessThan": "794aaf01444d4e765e2b067cba01cc69c1c68ed9" }, { "version": "bd1a5b2307279029faaddbecf2f2ac25eaef8dc6", "status": "affected", "versionType": "git" }, { "version": "4.4.248", "status": "affected", "versionType": "semver", "lessThan": "4.4.271" }, { "version": "4.9.248", "status": "affected", "versionType": "semver", "lessThan": "4.9.271" }, { "version": "4.14.212", "status": "affected", "versionType": "semver", "lessThan": "4.14.233" }, { "version": "4.19.163", "status": "affected", "versionType": "semver", "lessThan": "4.19.191" }, { "version": "5.4.80", "status": "affected", "versionType": "semver", "lessThan": "5.4.119" }, { "version": "5.9.11", "status": "affected", "versionType": "semver", "lessThan": "5.10" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.10", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.10" }, { "version": "4.4.271", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.4.*" }, { "version": "4.9.271", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.9.*" }, { "version": "4.14.233", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.14.*" }, { "version": "4.19.191", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.119", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.37", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.11.21", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.11.*" }, { "version": "5.12.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.12.*" }, { "version": "5.13", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }