CVE-2021-46959
Linux Kernel - SPI Use-After-Free Vulnerability
Description
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.
INFO
Published Date :
Feb. 29, 2024, 11:15 p.m.
Last Modified :
Dec. 10, 2024, 5:55 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-46959.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-46959 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-46959 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Dec. 10, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.4.248 up to (excluding) 4.4.271 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.9.248 up to (excluding) 4.9.271 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.14.212 up to (excluding) 4.14.233 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.19.163 up to (excluding) 4.19.191 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.4.80 up to (excluding) 5.4.119 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.10 up to (excluding) 5.10.37 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.11.21 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.12 up to (excluding) 5.12.4 Changed Reference Type https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74 No Types Assigned https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74 Patch Changed Reference Type https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74 No Types Assigned https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74 Patch Changed Reference Type https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4 No Types Assigned https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4 Patch Changed Reference Type https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4 No Types Assigned https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4 Patch Changed Reference Type https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815 No Types Assigned https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815 Patch Changed Reference Type https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815 No Types Assigned https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815 Patch Changed Reference Type https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9 No Types Assigned https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9 Patch Changed Reference Type https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9 No Types Assigned https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9 Patch Changed Reference Type https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6 No Types Assigned https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6 Patch Changed Reference Type https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6 No Types Assigned https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6 Patch Changed Reference Type https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e No Types Assigned https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e Patch Changed Reference Type https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e No Types Assigned https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e Patch Changed Reference Type https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c No Types Assigned https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c Patch Changed Reference Type https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c No Types Assigned https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c Patch Changed Reference Type https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1 No Types Assigned https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1 Patch Changed Reference Type https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1 No Types Assigned https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1 Patch Changed Reference Type https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7 No Types Assigned https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7 Patch Changed Reference Type https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7 No Types Assigned https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7 Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74 Added Reference https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4 Added Reference https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815 Added Reference https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9 Added Reference https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6 Added Reference https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e Added Reference https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c Added Reference https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1 Added Reference https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 29, 2024
Action Type Old Value New Value Added Description 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. Added Reference Linux https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-46959 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-46959
weaknesses.