Use-after-free in Linux kernel - CVE-2021-32606
Published: June 3, 2024
Vulnerability identifier: #VU90814
CSH Severity: Low
CVSS v4: 8.5 [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]
CVE-ID: CVE-2021-32606
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to a use-after-free error within the isotp_bind(), isotp_getname() and isotp_setsockopt() functions in net/can/isotp.c. A local user can execute arbitrary code.
Affected software
Linux kernel
Fedora
kernel
Fedora
kernel
How to mitigate CVE-2021-32606
Install update from vendor's website.
kernel - addressed in versions 5.11.21-100.fc32, 5.11.21-200.fc33, 5.11.21-300.fc34
External References
- https://www.openwall.com/lists/oss-security/2021/05/11/16
- http://www.openwall.com/lists/oss-security/2021/05/12/1
- http://www.openwall.com/lists/oss-security/2021/05/13/2
- http://www.openwall.com/lists/oss-security/2021/05/14/1
- http://www.openwall.com/lists/oss-security/2021/05/28/1
- https://security.netapp.com/advisory/ntap-20210625-0001/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HD3NJBG25AADVGPRC63RX2JOQBMPSWK4/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GI7Z7UBWBGD3ABNIL2DC7RQDCGA4UVQW/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/73D53S4IZFPFQMRABMXXLW4AJK3EULDX/
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2b17c400aeb44daf041627722581ade527bb3c1d