In the Linux kernel, the following vulnerability has been resolved: atm: nicstar: Fix possible use-after-free in nicstar_cleanup() This module'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

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

No data.

References
Link Providers
https://git.kernel.org/stable/c/2f958b6f6ba0854b39be748d21dfe71e0fe6580f cve-icon cve-icon
https://git.kernel.org/stable/c/34e7434ba4e97f4b85c1423a59b2922ba7dff2ea cve-icon cve-icon
https://git.kernel.org/stable/c/4e2a0848ea2cab0716d46f85a8ccd5fa9a493e51 cve-icon cve-icon
https://git.kernel.org/stable/c/5b991df8881088448cb223e769e37cab8dd40706 cve-icon cve-icon
https://git.kernel.org/stable/c/99779c9d9ffc7775da6f7fd8a7c93ac61657bed5 cve-icon cve-icon
https://git.kernel.org/stable/c/a7a7b2848312cc4c3a42b6e42a8ab2e441857aba cve-icon cve-icon
https://git.kernel.org/stable/c/a7f7c42e31157d1f0871d6a8e1a0b73a6b4ea785 cve-icon cve-icon
https://git.kernel.org/stable/c/bdf5334250c69fabf555b7322c75249ea7d5f148 cve-icon cve-icon
https://git.kernel.org/stable/c/c471569632654e57c83512e0fc1ba0dbb4544ad6 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2024052142-CVE-2021-47355-b7d6@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2021-47355 cve-icon
https://www.cve.org/CVERecord?id=CVE-2021-47355 cve-icon
History

Thu, 26 Dec 2024 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
Metrics cvssV3_1

{'score': 6.7, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

 cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-05-21T14:35:58.434Z

Updated: 2025-05-04T07:09:14.989Z

Reserved: 2024-05-21T14:28:16.987Z

Link: CVE-2021-47355

cve-icon Vulnrichment

Updated: 2024-08-04T05:32:08.643Z

cve-icon NVD

Status : Analyzed

Published: 2024-05-21T15:15:21.840

Modified: 2024-12-26T19:29:36.887

Link: CVE-2021-47355

cve-icon Redhat

Severity : Low

Publid Date: 2024-05-21T00:00:00Z

Links: CVE-2021-47355 - Bugzilla