OpenBSD kernel 3.3 and 3.4 allows local users to cause a denial of service (kernel panic) and possibly execute arbitrary code in 3.4 via a program with an invalid header that is not properly handled by (1) ibcs2_exec.c in the iBCS2 emulation (compat_ibcs2) or (2) exec_elf.c, which leads to a stack-based buffer overflow
Published Nov 21, 2003
4.6
MEDIUMCVSS 2.0
EPSS 1.14%
Description
OpenBSD kernel 3.3 and 3.4 allows local users to cause a denial of service (kernel panic) and possibly execute arbitrary code in 3.4 via a program with an invalid header that is not properly handled by (1) ibcs2_exec.c in the iBCS2 emulation (compat_ibcs2) or (2) exec_elf.c, which leads to a stack-based buffer overflow.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (8 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.14% (0.01136) | 65.33th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.14% (0.01143) | 62.41th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.43% (0.00425) | 60.14th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 0.34th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 0.50th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.14% (0.02140) | 80.06th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.14% (0.02140) | 78.13th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.14% (0.02140) | 56.90th | v2 (v2022.01.01) |
No CWE recorded.
References (7)
- ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.4/common/005_exec.patch vendor-advisoryx_refsource_OPENBSDPatch
- http://lists.grok.org.uk/pipermail/full-disclosure/2003-November/013315.html mailing-listx_refsource_FULLDISC
- http://marc.info/?l=openbsd-security-announce&m=106808820119679&w=2 x_refsource_CONFIRM
- http://marc.info/?l=openbsd-security-announce&m=106917441524978&w=2 x_refsource_CONFIRM
- http://www.guninski.com/msuxobsd2.html x_refsource_MISCExploitVendor Advisory
- http://www.openbsd.org/errata33.html vendor-advisoryx_refsource_OPENBSD
- http://www.securityfocus.com/bid/8978 vdb-entryx_refsource_BID
| Link | Providers | Tags |
|---|---|---|
| ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.4/common/005_exec.patch | vendor-advisoryx_refsource_OPENBSDPatch | |
| http://lists.grok.org.uk/pipermail/full-disclosure/2003-November/013315.html | mailing-listx_refsource_FULLDISC | |
| http://marc.info/?l=openbsd-security-announce&m=106808820119679&w=2 | x_refsource_CONFIRM | |
| http://marc.info/?l=openbsd-security-announce&m=106917441524978&w=2 | x_refsource_CONFIRM | |
| http://www.guninski.com/msuxobsd2.html | x_refsource_MISCExploitVendor Advisory | |
| http://www.openbsd.org/errata33.html | vendor-advisoryx_refsource_OPENBSD | |
| http://www.securityfocus.com/bid/8978 | vdb-entryx_refsource_BID |
Change history (0)
No recorded changes yet.