UBUNTU-CVE-2021-33574

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2021-33574
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33574.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-33574
Upstream
Published
2021-05-25T22:15:00Z
Modified
2025-10-24T04:50:23Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

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

Affected packages

Ubuntu:Pro:14.04:LTS / eglibc

Package

Name
eglibc
Purl
pkg:deb/ubuntu/eglibc@2.19-0ubuntu6.15+esm4?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.17-93ubuntu4
2.18-0ubuntu1
2.18-0ubuntu2
2.18-0ubuntu4
2.18-0ubuntu5
2.18-0ubuntu6
2.18-0ubuntu7
2.19-0ubuntu2
2.19-0ubuntu3
2.19-0ubuntu4
2.19-0ubuntu5
2.19-0ubuntu6
2.19-0ubuntu6.1
2.19-0ubuntu6.3
2.19-0ubuntu6.4
2.19-0ubuntu6.5
2.19-0ubuntu6.6
2.19-0ubuntu6.7
2.19-0ubuntu6.8
2.19-0ubuntu6.9
2.19-0ubuntu6.10
2.19-0ubuntu6.11
2.19-0ubuntu6.13
2.19-0ubuntu6.14
2.19-0ubuntu6.15
2.19-0ubuntu6.15+esm1
2.19-0ubuntu6.15+esm2
2.19-0ubuntu6.15+esm3
2.19-0ubuntu6.15+esm4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "eglibc-source",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-armel",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-dev",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-pic",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-prof",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "multiarch-support",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33574.json"

Ubuntu:Pro:16.04:LTS / glibc

Package

Name
glibc
Purl
pkg:deb/ubuntu/glibc@2.23-0ubuntu11.3+esm8?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.21-0ubuntu4
2.21-0ubuntu5
2.21-0ubuntu6
2.23-0ubuntu1
2.23-0ubuntu2
2.23-0ubuntu3
2.23-0ubuntu4
2.23-0ubuntu5
2.23-0ubuntu6
2.23-0ubuntu7
2.23-0ubuntu9
2.23-0ubuntu10
2.23-0ubuntu11
2.23-0ubuntu11.2
2.23-0ubuntu11.3
2.23-0ubuntu11.3+esm1
2.23-0ubuntu11.3+esm2
2.23-0ubuntu11.3+esm3
2.23-0ubuntu11.3+esm5
2.23-0ubuntu11.3+esm6
2.23-0ubuntu11.3+esm7
2.23-0ubuntu11.3+esm8

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "glibc-source",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "libc6-armel",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "libc6-dev",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "libc6-pic",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "libc6-s390",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "locales",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "locales-all",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "multiarch-support",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.23-0ubuntu11.3+esm8"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33574.json"

Ubuntu:Pro:18.04:LTS / glibc

Package

Name
glibc
Purl
pkg:deb/ubuntu/glibc@2.27-3ubuntu1.6+esm5?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.26-0ubuntu2
2.26-0ubuntu2.1
2.27-0ubuntu2
2.27-0ubuntu3
2.27-3ubuntu1
2.27-3ubuntu1.2
2.27-3ubuntu1.3
2.27-3ubuntu1.4
2.27-3ubuntu1.5
2.27-3ubuntu1.6
2.27-3ubuntu1.6+esm1
2.27-3ubuntu1.6+esm2
2.27-3ubuntu1.6+esm3
2.27-3ubuntu1.6+esm4
2.27-3ubuntu1.6+esm5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "glibc-source",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc6-armel",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc6-dev",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc6-lse",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc6-pic",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc6-s390",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "locales",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "locales-all",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "multiarch-support",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.27-3ubuntu1.6+esm5"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33574.json"

Ubuntu:20.04:LTS / glibc

Package

Name
glibc
Purl
pkg:deb/ubuntu/glibc@2.31-0ubuntu9.18?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.30-0ubuntu2
2.30-0ubuntu3
2.31-0ubuntu5
2.31-0ubuntu6
2.31-0ubuntu7
2.31-0ubuntu9
2.31-0ubuntu9.1
2.31-0ubuntu9.2
2.31-0ubuntu9.3
2.31-0ubuntu9.7
2.31-0ubuntu9.9
2.31-0ubuntu9.12
2.31-0ubuntu9.14
2.31-0ubuntu9.15
2.31-0ubuntu9.16
2.31-0ubuntu9.17
2.31-0ubuntu9.18

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "glibc-source",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc6-armel",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc6-dev",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc6-lse",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc6-pic",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc6-prof",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc6-s390",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "locales",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "locales-all",
            "binary_version": "2.31-0ubuntu9.18"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.31-0ubuntu9.18"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33574.json"