CVE-2022-37797: debian debian_linux NULL Pointer Dereference
Vulnerability summary
CVE-2022-37797 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in debian debian_linux. EPSS estimates a 2.55% chance of exploitation in the next 30 days, higher than 84.7% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 2Timeline
- 12-09-2022PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
In lighttpd 1.4.65, mod_wstunnel does not initialize a handler function pointer if an invalid HTTP request (websocket handshake) is received. It leads to null pointer dereference which crashes the server. It could be used by an external attacker to cause denial of service condition.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.55%
Chance of exploitation in the next 30 days
Percentile
85%
Versus all other CVEs
30-day change
+0.02 pp
From 2.53% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (redmine.lighttpd.net)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Opensuse3 products
- lighttpd&distro=openSUSE Leap 15.3< 1.4.66-bp154.2.3.1
- lighttpd&distro=openSUSE Leap 15.4< 1.4.66-bp154.2.3.1
- lighttpd&distro=openSUSE Tumbleweed< 1.4.66-1.1
Debian2 products
- lighttpd< 1.4.53-4+deb10u3 | < 1.4.66-1
- debian_linuxEOL10.0
Suse2 products
- lighttpd&distro=SUSE Package Hub 15 SP3< 1.4.66-bp154.2.3.1
- lighttpd&distro=SUSE Package Hub 15 SP4< 1.4.66-bp154.2.3.1
Lighttpd1 product
- lighttpd1.4.65
Ubuntu1 product
- lighttpdAll versions (No fix recorded)
5 vendors · 9 products
References
11 links
- lists.opensuse.org/archives/…Advisory