Missing authorization in Linux kernel - CVE-2021-28375
Published: March 15, 2021 / Updated: May 13, 2025
Vulnerability identifier: #VU92415
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-28375
CWE-ID: CWE-862
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to missing authorization error within the fastrpc_internal_invoke() function in drivers/misc/fastrpc.c. A local user can execute arbitrary code.
How to mitigate CVE-2021-28375
Install update from vendor's repository.
Sources
- https://lore.kernel.org/stable/YD03ew7+6v0XPh6l@kroah.com/
- https://git.kernel.org/linus/20c40794eb85ea29852d7bc37c55713802a543d6
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OMRQVOTASD3VZP6GE4JJHE27QU6FHTZ6/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TJPVQZPY3DHPV5I3IVNMSMO6D3PKZISX/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XAUNYDTGE6MB4NWL2SIHPCODCLET3JZB/
- https://security.netapp.com/advisory/ntap-20210401-0003/
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.24
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.106