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CVE-2003-0955

21
FAUCET Score

CVE-2003-0955 is a local denial-of-service and potential arbitrary code execution vulnerability affecting OpenBSD kernel versions 3.3 and 3.4. It stems from improper handling of programs with invalid headers in the iBCS2 emulation or exec_elf.c, leading to a stack-based buffer overflow. With a CVSS score of 4.6, it requires local access and low attack complexity, potentially resulting in a kernel panic or code execution. While not actively exploited in the wild (no KEV entry), public exploit code exists on ExploitDB, though there is minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.3CPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:3.3:*:*:*:*:*:*:*
3.4CPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:3.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.6MEDIUM

AV:L/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.14%
Probability of exploitation in next 30 days
EPSS Percentile
63.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-125 · Nov 19, 2003
This CVE's current EPSS score of 0.0114 is in the 92nd percentile among its peer group of 3,052 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

ftp.openbsd.org / pub/OpenBSD/patches/3.4/common/005_exec.patch
Patch
lists.grok.org.uk / pipermail/full-disclosure/2003-November/013315.html
marc.info
marc.info
guninski.com / msuxobsd2.html
ExploitVendor Advisory
openbsd.org / errata33.html
securityfocus.com / bid/8978