CVE-2007-4311

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2007-08-13 · updated 2026-06-16
Weakness: CWE-310

Description

The xfer_secondary_pool function in drivers/char/random.c in the Linux kernel 2.4 before 2.4.35 performs reseed operations on only the first few bytes of a buffer, which might make it easier for attackers to predict the output of the random number generator, related to incorrect use of the sizeof operator.

Affected products

Linux kernel: through 2.4.34

References

http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.4.34.y.git%3Ba=commit%3Bh=bd67d4c7b11cc33ebdc346bc8926d255b354cd64
http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.4.34.y.git%3Ba=commit%3Bh=faa3369ac2ea7feb0dd266b6a5e8d6ab153cf925
http://secunia.com/advisories/29058
http://www.debian.org/security/2008/dsa-1503
http://www.kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.34.6
http://www.kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.35
http://www.securityfocus.com/bid/25029
http://www.vupen.com/english/advisories/2007/2690
http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.4.34.y.git%3Ba=commit%3Bh=bd67d4c7b11cc33ebdc346bc8926d255b354cd64
http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.4.34.y.git%3Ba=commit%3Bh=faa3369ac2ea7feb0dd266b6a5e8d6ab153cf925
http://secunia.com/advisories/29058
http://www.debian.org/security/2008/dsa-1503

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