CVE-2008-4302

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2008-09-29 · updated 2026-06-16
Weakness: CWE-667

Description

fs/splice.c in the splice subsystem in the Linux kernel before 2.6.22.2 does not properly handle a failure of the add_to_page_cache_lru function, and subsequently attempts to unlock a page that was not locked, which allows local users to cause a denial of service (kernel BUG and system crash), as demonstrated by the fio I/O tool.

Affected products

Debian Linux: 4.0
Linux kernel: before 2.6.22.2 — fixed in 2.6.22.2
Red Hat Enterprise Linux: 5.0

How to fix

Upgrade to a fixed version: Linux kernel 2.6.22.2. Check the vendor advisory for mitigations.

References

http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.26.y.git%3Ba=commit%3Bh=6a860c979b35469e4d77da781a96bdb2ca05ae64
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.22.2
http://lists.opensuse.org/opensuse-security-announce/2008-11/msg00001.html
http://lkml.org/lkml/2007/7/20/168
http://secunia.com/advisories/32237
http://secunia.com/advisories/32485
http://secunia.com/advisories/32759
http://www.debian.org/security/2008/dsa-1653
http://www.juniper.net/security/auto/vulnerabilities/vuln31201.html
http://www.openwall.com/lists/oss-security/2008/09/16/10
http://www.redhat.com/support/errata/RHSA-2008-0957.html
http://www.securityfocus.com/bid/31201

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