CVE-2026-55204

Name
CVE-2026-55204
Description
HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c that fails to validate the return value of hpack_dht_defrag() when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memory pressure to dereference a NULL pointer and crash HAProxy worker processes, causing denial of service.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
disclosure@vulncheck.com https://github.com/haproxy/haproxy/commit/9a6d1fe3f00d86ab4ea6ea6ea0a5d48fc058a513
disclosure@vulncheck.com https://www.vulncheck.com/advisories/haproxy-null-pointer-dereference-in-hpack-dht-insert-function

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* haproxy >= None <= 3.4.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
haproxy edge-main 3.4.0-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.19-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.18-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.17-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.16-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.15-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.14-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.13-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.12-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.11-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.10-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.9-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.8-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.7-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.6-r1 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.6-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.5-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.4-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.3-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.2-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.1-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.2.0-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.0.10-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.0.9-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.0.8-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.0.7-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 3.0.6-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy edge-main 2.1.4-r0 None possibly vulnerable
haproxy 3.24-main 3.4.0-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.23-main 3.2.21-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.23-main 3.2.20-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.23-main 3.2.19-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.23-main 3.2.18-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.23-main 3.2.17-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.23-main 3.2.16-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.23-main 3.2.15-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.23-main 3.2.14-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.23-main 3.2.13-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.23-main 3.2.12-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.23-main 3.2.11-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.23-main 3.2.10-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.21-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.20-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.19-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.18-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.17-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.16-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.15-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.14-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.13-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.12-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.11-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.10-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.9-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.8-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.7-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.6-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.5-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.4-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.3-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.2-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 3.2.1-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.22-main 2.1.4-r0 None possibly vulnerable
haproxy 3.21-main 3.0.25-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.24-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.23-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.22-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.21-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.20-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.19-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.18-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.17-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.16-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.15-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.14-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.13-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.12-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.11-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.10-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.9-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.8-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.7-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 3.0.6-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.21-main 2.1.4-r0 None possibly vulnerable
haproxy 3.20-main 2.8.22-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.20-main 2.8.21-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.20-main 2.8.20-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.20-main 2.8.19-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.20-main 2.8.18-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.20-main 2.8.17-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.20-main 2.8.16-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.20-main 2.8.15-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.20-main 2.8.14-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.20-main 2.8.13-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.20-main 2.8.11-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.20-main 2.1.4-r0 None possibly vulnerable
haproxy 3.19-main 2.8.16-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.19-main 2.8.15-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.19-main 2.8.14-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.19-main 2.8.13-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.19-main 2.8.11-r0 Milan P. Stanić <mps@arvanta.net> possibly vulnerable
haproxy 3.19-main 2.1.4-r0 None possibly vulnerable