CVE-2004-0554

Linux kernel 2.4.x-2.6.x - DoS

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2004-0554. PoCs published by lorenzo.

AI-analyzed exploit summary This exploit targets a kernel vulnerability in Linux kernels 2.4.18 to 2.6.7 by leveraging an off-by-four error in the `frstor` instruction during inline assembly. It triggers a local denial-of-service (DoS) by corrupting kernel memory through a timer-based signal handler.

Description

Linux kernel 2.4.x and 2.6.x for x86 allows local users to cause a denial of service (system crash), possibly via an infinite loop that triggers a signal handler with a certain sequence of fsave and frstor instructions, as originally demonstrated using a "crash.c" program.

Exploits (1)

exploitdb WORKING POC VERIFIED
by lorenzo · cdoslinux
https://www.exploit-db.com/exploits/306

This exploit targets a kernel vulnerability in Linux kernels 2.4.18 to 2.6.7 by leveraging an off-by-four error in the `frstor` instruction during inline assembly. It triggers a local denial-of-service (DoS) by corrupting kernel memory through a timer-based signal handler.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Moderate
Reliability
Reliable
Target: Linux kernel versions 2.4.18 to 2.6.7
No auth needed
Prerequisites: Local access to the vulnerable system · Kernel version within the affected range
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (26)

Core 26
Core References
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/20163
Third Party Advisory, US Government Resource third-party-advisory x_refsource_cert-vn
http://www.kb.cert.org/vuls/id/973654
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9426
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2006/dsa-1082
Vendor Advisory vendor-advisory x_refsource_redhat
http://www.redhat.com/support/errata/RHSA-2004-255.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/10538
Vendor Advisory vendor-advisory x_refsource_redhat
http://www.redhat.com/support/errata/RHSA-2004-260.html
Various Sources x_refsource_misc
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15905
Vendor Advisory vendor-advisory x_refsource_suse
http://www.novell.com/linux/security/advisories/2004_17_kernel.html
Various Sources vendor-advisory x_refsource_trustix
http://www.trustix.net/errata/2004/0034/
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2006/dsa-1070
Various Sources vendor-advisory x_refsource_fedora
http://lwn.net/Articles/91155/
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/20162
Mailing List mailing-list x_refsource_bugtraq
http://marc.info/?l=bugtraq&m=108786114032681&w=2
Mailing List vendor-advisory x_refsource_engarde
http://marc.info/?l=bugtraq&m=108793699910896&w=2
Vendor Advisory vendor-advisory x_refsource_conectiva
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000845
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2006/dsa-1067
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/16412
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2006/dsa-1069
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2915
Vendor Advisory vendor-advisory x_refsource_mandrake
http://www.mandriva.com/security/advisories?name=MDKSA-2004:062
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/20202
Third Party Advisory vendor-advisory x_refsource_gentoo
http://security.gentoo.org/glsa/glsa-200407-02.xml
Mailing List mailing-list x_refsource_mlist
http://marc.info/?l=linux-kernel&m=108681568931323&w=2
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/20338

Scores

EPSS 0.0087
EPSS Percentile 54.0%

Details

Status published
Products (40)
avaya/converged_communications_server 2.0
avaya/intuity_audix
avaya/modular_messaging_message_storage_server s3400
avaya/s8300 r2.0.0
avaya/s8300 r2.0.1
avaya/s8500 r2.0.0
avaya/s8500 r2.0.1
avaya/s8700 r2.0.0
avaya/s8700 r2.0.1
conectiva/linux 8.0
... and 30 more
Published Aug 06, 2004
Tracked Since Feb 18, 2026