Description
Vulnerability in the MIT-SHM extension of the X server on Linux (XFree86) 4.2.1 and earlier allows local users to read and write arbitrary shared memory, possibly to cause a denial of service or gain privileges.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 3.0 | xfree86 | 4.1.0-16woody1 | DSA-380 |
Advisories 1
- DSA-380 xfree86 - buffer overflows, denial of service Debian Security (DSA / DLA) · Mar 9, 2026
References
- CLSA-2002:529 vendor-advisory
- 228529 vendor-advisory
- 20021024 GLSA: xfree mailing-list
- xfree86-mitshm-memory-access(8706) vdb-entry
- 4396 vdb-entry
- DSA-380 vendor-advisory
- RHSA-2003:067 vendor-advisory
- CSSA-2002-009.0 vendor-advisory
- 1017429 vendor-advisory