DEBIAN-CVE-2021-3782

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Source
https://security-tracker.debian.org/tracker/CVE-2021-3782
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-3782.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2021-3782
Upstream
Published
2022-09-23T16:15:10.143Z
Modified
2025-11-17T04:23:01.629849Z
Severity
  • 6.6 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H CVSS Calculator
Summary
[none]
Details

An internal reference count is held on the buffer pool, incremented every time a new buffer is created from the pool. The reference count is maintained as an int; on LP64 systems this can cause the reference count to overflow if the client creates a large number of wlshm buffer objects, or if it can coerce the server to create a large number of external references to the buffer storage. With the reference count overflowing, a use-after-free can be constructed on the wlshm_pool tracking structure, where values may be incremented or decremented; it may also be possible to construct a limited oracle to leak 4 bytes of server-side memory to the attacking client at a time.

References

Affected packages

Debian:11 / wayland

Package

Name
wayland
Purl
pkg:deb/debian/wayland?arch=source

Affected ranges

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

Affected versions

1.*

1.18.0-2~exp1.1
1.19.0-1
1.19.0-2
1.20.0-1
1.20.92-1
1.21.0-1
1.22.0-1
1.22.0-2
1.22.0-2.1
1.23.0-1~bpo12+1
1.23.0-1
1.23.1-1
1.23.1-2
1.23.1-3
1.24.0-1
1.24.0-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / wayland

Package

Name
wayland
Purl
pkg:deb/debian/wayland?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.21.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / wayland

Package

Name
wayland
Purl
pkg:deb/debian/wayland?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.21.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / wayland

Package

Name
wayland
Purl
pkg:deb/debian/wayland?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.21.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}