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CVE-2021-47321 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: watchdog: Fix possible use-after-free by calling del_timer_sync() This driver's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 3.x Severity and Vector Strings:

NIST CVSS score
NIST: NVD
Base Score:  7.8 HIGH
Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://git.kernel.org/stable/c/1a053c4d716898a53c2e31c574a70ea0c37044a3 Patch 
https://git.kernel.org/stable/c/1a053c4d716898a53c2e31c574a70ea0c37044a3 Patch 
https://git.kernel.org/stable/c/4c05dac488a660fe2925c047ecb119e7afaaeb1e Patch 
https://git.kernel.org/stable/c/4c05dac488a660fe2925c047ecb119e7afaaeb1e Patch 
https://git.kernel.org/stable/c/58606882ad8ec6c39e0f40344b922921ef94ab4d Patch 
https://git.kernel.org/stable/c/58606882ad8ec6c39e0f40344b922921ef94ab4d Patch 
https://git.kernel.org/stable/c/66ba9cf929b1c4fabf545bd4c18f6f64e23e46e4 Patch 
https://git.kernel.org/stable/c/66ba9cf929b1c4fabf545bd4c18f6f64e23e46e4 Patch 
https://git.kernel.org/stable/c/8bec568d7518b1504a602ed5376bb322e4dbb270 Patch 
https://git.kernel.org/stable/c/8bec568d7518b1504a602ed5376bb322e4dbb270 Patch 
https://git.kernel.org/stable/c/ca96b8ea5e74956071154bdb456778cc3027e79f Patch 
https://git.kernel.org/stable/c/ca96b8ea5e74956071154bdb456778cc3027e79f Patch 
https://git.kernel.org/stable/c/d0212f095ab56672f6f36aabc605bda205e1e0bf Patch 
https://git.kernel.org/stable/c/d0212f095ab56672f6f36aabc605bda205e1e0bf Patch 
https://git.kernel.org/stable/c/db222f1477ad5692cd454709b714949807e5d111 Patch 
https://git.kernel.org/stable/c/db222f1477ad5692cd454709b714949807e5d111 Patch 
https://git.kernel.org/stable/c/ecd620e0fb1ff7f78fdb593379b2e6938c99707a Patch 
https://git.kernel.org/stable/c/ecd620e0fb1ff7f78fdb593379b2e6938c99707a Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
   Show Matching CPE(s)
Up to (excluding)
4.4.276
 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
   Show Matching CPE(s)
From (including)
4.5
Up to (excluding)
4.9.276
 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
   Show Matching CPE(s)
From (including)
4.10
Up to (excluding)
4.14.240
 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
   Show Matching CPE(s)
From (including)
4.15
Up to (excluding)
4.19.198
 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
   Show Matching CPE(s)
From (including)
4.20
Up to (excluding)
5.4.134
 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
   Show Matching CPE(s)
From (including)
5.5
Up to (excluding)
5.10.52
 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
   Show Matching CPE(s)
From (including)
5.11
Up to (excluding)
5.12.9
 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
   Show Matching CPE(s)
From (including)
5.13
Up to (excluding)
5.13.4

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-47321
NVD Published Date:
05/21/2024
NVD Last Modified:
12/26/2024
Source:
kernel.org