Description
acpid.c in acpid before 2.0.9 does not properly handle a situation in which a process has connected to acpid.socket but is not reading any data, which allows local users to cause a denial of service (daemon hang) via a crafted application that performs a connect system call but no read system calls.
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 14 | acpid | 1:2.0.9-1 | — |
| Debian 13 | acpid | 1:2.0.9-1 | — |
| Debian 12 | acpid | 1:2.0.9-1 | — |
| Debian 6.0 | acpid | 1:2.0.7-1squeeze3 | DSA-2362-1 |
| Debian 5.0 | acpid | 1.0.8-1lenny4 | DSA-2362-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Exploit-DB 1
- acpid 1.0.x - Multiple Local Denial of Service Vulnerabilities EDB-35240 · dos · Jan 19, 2011 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- DSA-2362-1 acpid - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- 45915 vdb-entry
- FEDORA-2011-6681 vendor-advisory
- 44621 third-party-advisory
- 42947 third-party-advisory
- [oss-security] 20110315 Re: 2 acpid flaws mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=688698
- [oss-security] 20110119 2 acpid flaws mailing-list
- [oss-security] 20110315 Re: 2 acpid flaws mailing-list
- FEDORA-2011-6460 vendor-advisory