Integer overflow in the pipe_build_write_buffer function (sys/kern/sys_pipe.c) in the direct write optimization feature in the pipe implementation in FreeBSD 7.1 through 7.2 and 6.3 through 6.4 allows local users to bypass virtual-to-physical address lookups and read sensitive information in memory pages via unspecified vectors
Published Jun 18, 2009
4.9
MEDIUMCVSS 2.0
EPSS 0.44%
Description
Integer overflow in the pipe_build_write_buffer function (sys/kern/sys_pipe.c) in the direct write optimization feature in the pipe implementation in FreeBSD 7.1 through 7.2 and 6.3 through 6.4 allows local users to bypass virtual-to-physical address lookups and read sensitive information in memory pages via unspecified vectors.
Affected products
No data.
- 6.3
- 6.3
- 6.3_releng
- 6.4
- 6.4
- 6.4
- 7.1
- 7.1
- 7.1
- 7.1
- 7.1
- 7.1
- 7.1
- 7.2
- 7.2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
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:C/I:N/A:N
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 2, 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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.44% (0.00436) | 35.60th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.44% (0.00436) | 34.54th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.07% (0.00070) | 18.81th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.03% (0.01034) | 39.91th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
References (7)
- http://osvdb.org/55044 vdb-entryx_refsource_OSVDB
- http://secunia.com/advisories/35398 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://security.freebsd.org/advisories/FreeBSD-SA-09:09.pipe.asc vendor-advisoryx_refsource_FREEBSDPatchVendor Advisory
- http://security.freebsd.org/patches/SA-09:09/pipe.patch x_refsource_CONFIRMExploitVendor Advisory
- http://www.securityfocus.com/bid/35279 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1022365 vdb-entryx_refsource_SECTRACK
- https://exchange.xforce.ibmcloud.com/vulnerabilities/51109 vdb-entryx_refsource_XF
| Link | Providers | Tags |
|---|---|---|
| http://osvdb.org/55044 | vdb-entryx_refsource_OSVDB | |
| http://secunia.com/advisories/35398 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://security.freebsd.org/advisories/FreeBSD-SA-09:09.pipe.asc | vendor-advisoryx_refsource_FREEBSDPatchVendor Advisory | |
| http://security.freebsd.org/patches/SA-09:09/pipe.patch | x_refsource_CONFIRMExploitVendor Advisory | |
| http://www.securityfocus.com/bid/35279 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/id?1022365 | vdb-entryx_refsource_SECTRACK | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/51109 | vdb-entryx_refsource_XF |
Change history (0)
No recorded changes yet.