DEBIAN-CVE-2021-3782
- Source
- https://security-tracker.debian.org/tracker/CVE-2021-3782
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-3782.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2021-3782
- Upstream
- Published
- 2022-09-23T16:15:10Z
- Modified
- 2026-09-01T20:04:31Z
- 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 wl_shm 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 wl_shm_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:12 / wayland
Package
- Name
- wayland
- Purl
- pkg:deb/debian/wayland?arch=source&distro=bookworm
Debian:13 / wayland
Package
- Name
- wayland
- Purl
- pkg:deb/debian/wayland?arch=source&distro=trixie
Debian:14 / wayland
Package
- Name
- wayland
- Purl
- pkg:deb/debian/wayland?arch=source&distro=forky