CVE-2021-46959
Vulnerability from cvelistv5
Published
2024-02-29 22:31
Modified
2024-12-19 07:32
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: spi: Fix use-after-free with devm_spi_alloc_* We can't rely on the contents of the devres list during spi_unregister_controller(), as the list is already torn down at the time we perform devres_find() for devm_spi_release_controller. This causes devices registered with devm_spi_alloc_{master,slave}() to be mistakenly identified as legacy, non-devm managed devices and have their reference counters decremented below 0. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 660 at lib/refcount.c:28 refcount_warn_saturate+0x108/0x174 [<b0396f04>] (refcount_warn_saturate) from [<b03c56a4>] (kobject_put+0x90/0x98) [<b03c5614>] (kobject_put) from [<b0447b4c>] (put_device+0x20/0x24) r4:b6700140 [<b0447b2c>] (put_device) from [<b07515e8>] (devm_spi_release_controller+0x3c/0x40) [<b07515ac>] (devm_spi_release_controller) from [<b045343c>] (release_nodes+0x84/0xc4) r5:b6700180 r4:b6700100 [<b04533b8>] (release_nodes) from [<b0454160>] (devres_release_all+0x5c/0x60) r8:b1638c54 r7:b117ad94 r6:b1638c10 r5:b117ad94 r4:b163dc10 [<b0454104>] (devres_release_all) from [<b044e41c>] (__device_release_driver+0x144/0x1ec) r5:b117ad94 r4:b163dc10 [<b044e2d8>] (__device_release_driver) from [<b044f70c>] (device_driver_detach+0x84/0xa0) r9:00000000 r8:00000000 r7:b117ad94 r6:b163dc54 r5:b1638c10 r4:b163dc10 [<b044f688>] (device_driver_detach) from [<b044d274>] (unbind_store+0xe4/0xf8) Instead, determine the devm allocation state as a flag on the controller which is guaranteed to be stable during cleanup.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7Patch
Impacted products
Vendor Product Version
Linux Linux Version: a4add022c1552b0d51a0b89a4781919d6ebac4f9
Version: 0870525cf94bc27907e94ce99afb6d7239ffd2f5
Version: 8c45a1c6c951bbe7f95db78fcab46f7337364468
Version: 234b432c7b6184b2d6c5ba2c55f0dd5023c0edf0
Version: 3e04a4976addbedcad326f47b0dd4efc570a1fac
Version: 5e844cc37a5cbaa460e68f9a989d321d63088a89
Version: 5e844cc37a5cbaa460e68f9a989d321d63088a89
Version: 5e844cc37a5cbaa460e68f9a989d321d63088a89
Version: 5e844cc37a5cbaa460e68f9a989d321d63088a89
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   Linux Linux Version: 5.10
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    "cveId": "CVE-2021-46959",
    "datePublished": "2024-02-29T22:31:12.304Z",
    "dateReserved": "2024-02-27T18:42:55.939Z",
    "dateUpdated": "2024-12-19T07:32:34.361Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-46959\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-29T23:15:07.230\",\"lastModified\":\"2024-12-10T17:55:18.607\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nspi: Fix use-after-free with devm_spi_alloc_*\\n\\nWe can\u0027t 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[\u003cb0396f04\u003e] (refcount_warn_saturate) from [\u003cb03c56a4\u003e] (kobject_put+0x90/0x98)\\n[\u003cb03c5614\u003e] (kobject_put) from [\u003cb0447b4c\u003e] (put_device+0x20/0x24)\\n r4:b6700140\\n[\u003cb0447b2c\u003e] (put_device) from [\u003cb07515e8\u003e] (devm_spi_release_controller+0x3c/0x40)\\n[\u003cb07515ac\u003e] (devm_spi_release_controller) from [\u003cb045343c\u003e] (release_nodes+0x84/0xc4)\\n r5:b6700180 r4:b6700100\\n[\u003cb04533b8\u003e] (release_nodes) from [\u003cb0454160\u003e] (devres_release_all+0x5c/0x60)\\n r8:b1638c54 r7:b117ad94 r6:b1638c10 r5:b117ad94 r4:b163dc10\\n[\u003cb0454104\u003e] (devres_release_all) from [\u003cb044e41c\u003e] (__device_release_driver+0x144/0x1ec)\\n r5:b117ad94 r4:b163dc10\\n[\u003cb044e2d8\u003e] (__device_release_driver) from [\u003cb044f70c\u003e] (device_driver_detach+0x84/0xa0)\\n r9:00000000 r8:00000000 r7:b117ad94 r6:b163dc54 r5:b1638c10 r4:b163dc10\\n[\u003cb044f688\u003e] (device_driver_detach) from [\u003cb044d274\u003e] (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.\"},{\"lang\":\"es\",\"value\":\" En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: spi: corrige el Use-After-Free con devm_spi_alloc_* No podemos confiar en el contenido de la lista devres durante spi_unregister_controller(), ya que la lista ya est\u00e1 eliminada en ese momento. Realizamos devres_find() para devm_spi_release_controller. Esto hace que los dispositivos registrados con devm_spi_alloc_{master,slave}() se identifiquen err\u00f3neamente como dispositivos heredados, no administrados por devm y sus contadores de referencia disminuyan por debajo de 0. ------------[ cortar aqu\u00ed ] ------------ ADVERTENCIA: CPU: 1 PID: 660 en lib/refcount.c:28 refcount_warn_saturate+0x108/0x174 [] (refcount_warn_saturate) de [] (kobject_put+ 0x90/0x98) [] (kobject_put) de [] (put_device+0x20/0x24) r4:b6700140 [] (put_device) de [] (devm_spi_release_controller+0x3c/0x40 ) [ ] (devm_spi_release_controller) de [] (release_nodes+0x84/0xc4) r5:b6700180 r4:b6700100 [] (release_nodes) de [] (devres_release_all+0x5c/0x6 0) r8:b1638c54 r7:b117ad94 r6:b1638c10 r5:b117ad94 r4:b163dc10 [] (devres_release_all) de [] (__device_release_driver+0x144/0x1ec) r5:b117ad94 r4:b163dc10 [] (__device_release_driver) de [\u0026lt; b044f70c\u0026gt;] (device_driver_detach+0x84/0xa0) r9:00000000 r8:00000000 r7:b117ad94 r6:b163dc54 r5:b1638c10 r4:b163dc10 [] (device_driver_detach) de [ ] (unbind_store+0xe4/0xf8) en su lugar , determine el estado de asignaci\u00f3n devm como un indicador en el controlador que se garantiza que ser\u00e1 estable durante la limpieza.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.4.248\",\"versionEndExcluding\":\"4.4.271\",\"matchCriteriaId\":\"B30F04D8-0BA7-4D9B-A893-2A53C8EC9B86\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.9.248\",\"versionEndExcluding\":\"4.9.271\",\"matchCriteriaId\":\"DD825021-F606-4423-B5D3-3C780356AAF1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.14.212\",\"versionEndExcluding\":\"4.14.233\",\"matchCriteriaId\":\"BD177AC8-D485-4E8E-B332-C1D2547C42EF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.19.163\",\"versionEndExcluding\":\"4.19.191\",\"matchCriteriaId\":\"182A108D-24D4-455D-946F-1FDBB03603A1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.4.80\",\"versionEndExcluding\":\"5.4.119\",\"matchCriteriaId\":\"70F0C6AB-3B72-4F61-B482-4549E6B17950\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.10\",\"versionEndExcluding\":\"5.10.37\",\"matchCriteriaId\":\"4E433B72-3E3A-435E-9A66-80D28868BDF2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.11.21\",\"matchCriteriaId\":\"8CBB94EC-EC33-4464-99C5-03E5542715F0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.12\",\"versionEndExcluding\":\"5.12.4\",\"matchCriteriaId\":\"D8C7052F-1B7B-4327-9C2B-84EBF3243838\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c\",\"source\"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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:17:42.989Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-46959\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:57:07.725975Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:18.640Z\"}}], \"cna\": {\"title\": \"spi: Fix use-after-free with devm_spi_alloc_*\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"a4add022c1552b0d51a0b89a4781919d6ebac4f9\", \"lessThan\": \"62bb2c7f2411a0045c24831f11ecacfc35610815\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0870525cf94bc27907e94ce99afb6d7239ffd2f5\", \"lessThan\": \"8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8c45a1c6c951bbe7f95db78fcab46f7337364468\", \"lessThan\": \"8e029707f50a82c53172359c686b2536ab54e58c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"234b432c7b6184b2d6c5ba2c55f0dd5023c0edf0\", \"lessThan\": \"28a5529068c51cdf0295ab1e11a99a3a909a03e4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3e04a4976addbedcad326f47b0dd4efc570a1fac\", \"lessThan\": \"001c8e83646ad3b847b18f6ac55a54367d917d74\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5e844cc37a5cbaa460e68f9a989d321d63088a89\", \"lessThan\": \"c7fabe372a9031acd00498bc718ce27c253abfd1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5e844cc37a5cbaa460e68f9a989d321d63088a89\", \"lessThan\": \"cee78aa24578edac8cf00513dca618c0acc17cd7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5e844cc37a5cbaa460e68f9a989d321d63088a89\", \"lessThan\": \"8735248ebb918d25427965f0db07939ed0473ec6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5e844cc37a5cbaa460e68f9a989d321d63088a89\", \"lessThan\": \"794aaf01444d4e765e2b067cba01cc69c1c68ed9\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/spi/spi.c\", \"include/linux/spi/spi.h\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.10\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.10\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.4.271\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.4.*\"}, {\"status\": \"unaffected\", \"version\": \"4.9.271\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.233\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.191\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.119\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.37\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.11.21\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.11.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/spi/spi.c\", \"include/linux/spi/spi.h\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815\"}, {\"url\": \"https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e\"}, {\"url\": \"https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c\"}, {\"url\": \"https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4\"}, {\"url\": \"https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74\"}, {\"url\": \"https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1\"}, {\"url\": \"https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7\"}, {\"url\": \"https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6\"}, {\"url\": \"https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nspi: Fix use-after-free with devm_spi_alloc_*\\n\\nWe can\u0027t 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[\u003cb0396f04\u003e] (refcount_warn_saturate) from [\u003cb03c56a4\u003e] (kobject_put+0x90/0x98)\\n[\u003cb03c5614\u003e] (kobject_put) from [\u003cb0447b4c\u003e] (put_device+0x20/0x24)\\n r4:b6700140\\n[\u003cb0447b2c\u003e] (put_device) from [\u003cb07515e8\u003e] (devm_spi_release_controller+0x3c/0x40)\\n[\u003cb07515ac\u003e] (devm_spi_release_controller) from [\u003cb045343c\u003e] (release_nodes+0x84/0xc4)\\n r5:b6700180 r4:b6700100\\n[\u003cb04533b8\u003e] (release_nodes) from [\u003cb0454160\u003e] (devres_release_all+0x5c/0x60)\\n r8:b1638c54 r7:b117ad94 r6:b1638c10 r5:b117ad94 r4:b163dc10\\n[\u003cb0454104\u003e] (devres_release_all) from [\u003cb044e41c\u003e] (__device_release_driver+0x144/0x1ec)\\n r5:b117ad94 r4:b163dc10\\n[\u003cb044e2d8\u003e] (__device_release_driver) from [\u003cb044f70c\u003e] (device_driver_detach+0x84/0xa0)\\n r9:00000000 r8:00000000 r7:b117ad94 r6:b163dc54 r5:b1638c10 r4:b163dc10\\n[\u003cb044f688\u003e] (device_driver_detach) from [\u003cb044d274\u003e] (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.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T07:32:34.361Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-46959\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T07:32:34.361Z\", \"dateReserved\": \"2024-02-27T18:42:55.939Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-02-29T22:31:12.304Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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