What’s Vulnerable › Vulnerabilities
CVE-2021-33574
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 3.5% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2021-05-25 · updated 2026-10-14
- Weakness: CWE-416
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.
Affected products
- Debian Linux: 10.0
- Fedoraproject Fedora: 33, 34
- GNU C Library (glibc): 2.32, 2.33
- NetApp Cloud Backup: all versions
- E-Series SANtricity OS Controller Software 11.x: from 11.0 through 11.70.1
- NetApp H300E Firmware: all versions
- NetApp H300S Firmware: all versions
- NetApp H410S Firmware: all versions
- NetApp H500E Firmware: all versions
- NetApp H500S Firmware: all versions
- NetApp H700E Firmware: all versions
- NetApp H700S Firmware: all versions
- NetApp Solidfire Baseboard Management Controller Firmware: all versions
References
- https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KJYYIMDDYOHTP2PORLABTOHYQYYREZDD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RBUUWUGXVILQXVWEOU7N42ICHPJNAEUP/
- https://security.gentoo.org/glsa/202107-07
- https://security.netapp.com/advisory/ntap-20210629-0005/
- https://sourceware.org/bugzilla/show_bug.cgi?id=27896
- https://sourceware.org/bugzilla/show_bug.cgi?id=27896#c1
- https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KJYYIMDDYOHTP2PORLABTOHYQYYREZDD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RBUUWUGXVILQXVWEOU7N42ICHPJNAEUP/
- https://security.gentoo.org/glsa/202107-07
- https://security.netapp.com/advisory/ntap-20210629-0005/
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