CVE-2009-1935

Severity: medium (CVSS 4.9 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-06-18 · updated 2026-06-16
Weakness: CWE-189

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

FreeBSD: 6.3, 6.3-release_p10, 6.3_releng, 6.4, 6.4-release_p4, 6.4-stable (+9)

References

http://osvdb.org/55044
http://secunia.com/advisories/35398
http://security.freebsd.org/advisories/FreeBSD-SA-09:09.pipe.asc
http://security.freebsd.org/patches/SA-09:09/pipe.patch
http://www.securityfocus.com/bid/35279
http://www.securitytracker.com/id?1022365
https://exchange.xforce.ibmcloud.com/vulnerabilities/51109
http://osvdb.org/55044
http://secunia.com/advisories/35398
http://security.freebsd.org/advisories/FreeBSD-SA-09:09.pipe.asc
http://security.freebsd.org/patches/SA-09:09/pipe.patch
http://www.securityfocus.com/bid/35279

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