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CVE-2021-46959 (GCVE-0-2021-46959)

Vulnerability from cvelistv5 – Published: 2024-02-29 22:31 – Updated: 2026-05-23 15:18
VLAI
Title
spi: Fix use-after-free with devm_spi_alloc_*
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.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 15:57 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a4add022c1552b0d51a0b89a4781919d6ebac4f9 , < 62bb2c7f2411a0045c24831f11ecacfc35610815 (git)
Affected: 0870525cf94bc27907e94ce99afb6d7239ffd2f5 , < 8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e (git)
Affected: 8c45a1c6c951bbe7f95db78fcab46f7337364468 , < 8e029707f50a82c53172359c686b2536ab54e58c (git)
Affected: 234b432c7b6184b2d6c5ba2c55f0dd5023c0edf0 , < 28a5529068c51cdf0295ab1e11a99a3a909a03e4 (git)
Affected: 3e04a4976addbedcad326f47b0dd4efc570a1fac , < 001c8e83646ad3b847b18f6ac55a54367d917d74 (git)
Affected: 5e844cc37a5cbaa460e68f9a989d321d63088a89 , < c7fabe372a9031acd00498bc718ce27c253abfd1 (git)
Affected: 5e844cc37a5cbaa460e68f9a989d321d63088a89 , < cee78aa24578edac8cf00513dca618c0acc17cd7 (git)
Affected: 5e844cc37a5cbaa460e68f9a989d321d63088a89 , < 8735248ebb918d25427965f0db07939ed0473ec6 (git)
Affected: 5e844cc37a5cbaa460e68f9a989d321d63088a89 , < 794aaf01444d4e765e2b067cba01cc69c1c68ed9 (git)
Affected: bd1a5b2307279029faaddbecf2f2ac25eaef8dc6 (git)
Affected: 4.4.248 , < 4.4.271 (semver)
Affected: 4.9.248 , < 4.9.271 (semver)
Affected: 4.14.212 , < 4.14.233 (semver)
Affected: 4.19.163 , < 4.19.191 (semver)
Affected: 5.4.80 , < 5.4.119 (semver)
Affected: 5.9.11 , < 5.10 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 4.4.271 , ≤ 4.4.* (semver)
Unaffected: 4.9.271 , ≤ 4.9.* (semver)
Unaffected: 4.14.233 , ≤ 4.14.* (semver)
Unaffected: 4.19.191 , ≤ 4.19.* (semver)
Unaffected: 5.4.119 , ≤ 5.4.* (semver)
Unaffected: 5.10.37 , ≤ 5.10.* (semver)
Unaffected: 5.11.21 , ≤ 5.11.* (semver)
Unaffected: 5.12.4 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "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.\"}]",
      "id": "CVE-2021-46959",
      "lastModified": "2024-12-10T17:55:18.607",
      "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}]}",
      "published": "2024-02-29T23:15:07.230",
      "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\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Analyzed",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-416\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-46959\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-29T23:15:07.230\",\"lastModified\":\"2026-06-17T04:15:59.303\",\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/spi/spi.c\",\"include/linux/spi/spi.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"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\",\"status\":\"affected\"},{\"version\":\"bd1a5b2307279029faaddbecf2f2ac25eaef8dc6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4.4.248\",\"lessThan\":\"4.4.271\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.9.248\",\"lessThan\":\"4.9.271\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.14.212\",\"lessThan\":\"4.14.233\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.163\",\"lessThan\":\"4.19.191\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.80\",\"lessThan\":\"5.4.119\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.9.11\",\"lessThan\":\"5.10\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/spi/spi.c\",\"include/linux/spi/spi.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.10\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.10\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.4.271\",\"lessThanOrEqual\":\"4.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.9.271\",\"lessThanOrEqual\":\"4.9.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.14.233\",\"lessThanOrEqual\":\"4.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.191\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.119\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.37\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.11.21\",\"lessThanOrEqual\":\"5.11.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.12.4\",\"lessThanOrEqual\":\"5.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.13\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"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}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-09-10T15:57:07.725975Z\",\"id\":\"CVE-2021-46959\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA 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      "source": "Red Hat CSAF VEX",
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\"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-1.2.0\"}, \"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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.4.271\", \"versionStartIncluding\": \"4.4.248\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.271\", \"versionStartIncluding\": \"4.9.248\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.233\", \"versionStartIncluding\": \"4.14.212\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.191\", \"versionStartIncluding\": \"4.19.163\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.119\", \"versionStartIncluding\": \"5.4.80\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.37\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.11.21\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.4\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.9.11\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-23T15:18:46.554Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-46959\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-23T15:18:46.554Z\", \"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": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.