CVE-2021-33574

critical

Description

The mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact.

References

https://sourceware.org/bugzilla/show_bug.cgi?id=27896

https://sourceware.org/bugzilla/show_bug.cgi?id=27896#c1

https://lists.fedoraproject.org/archives/list/[email protected]/message/RBUUWUGXVILQXVWEOU7N42ICHPJNAEUP/

https://security.netapp.com/advisory/ntap-20210629-0005/

https://security.gentoo.org/glsa/202107-07

Details

Source: MITRE

Published: 2021-05-25

Updated: 2021-07-07

Type: CWE-416

Risk Information

CVSS v2

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 3.9

Severity: CRITICAL