CVE-2010-4668

Severity: medium (CVSS 4.7 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: none known
Published: 2011-01-03 · updated 2026-06-16
Weakness: CWE-400

Description

The blk_rq_map_user_iov function in block/blk-map.c in the Linux kernel before 2.6.37-rc7 allows local users to cause a denial of service (panic) via a zero-length I/O request in a device ioctl to a SCSI device, related to an unaligned map. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4163.

Affected products

Linux kernel: before 2.6.37; 2.6.37, 2.6.37-rc1, 2.6.37-rc2, 2.6.37-rc3, 2.6.37-rc4, 2.6.37-rc5 (+1) — fixed in 2.6.37

How to fix

Upgrade to a fixed version: Linux kernel 2.6.37. Check the vendor advisory for mitigations.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=5478755616ae2ef1ce144dded589b62b2a50d575
http://lkml.org/lkml/2010/11/29/68
http://lkml.org/lkml/2010/11/29/70
http://openwall.com/lists/oss-security/2010/11/29/1
http://openwall.com/lists/oss-security/2010/11/30/4
http://openwall.com/lists/oss-security/2010/11/30/7
http://secunia.com/advisories/42890
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.37-rc7
http://www.redhat.com/support/errata/RHSA-2011-0007.html
http://www.securityfocus.com/bid/45660
https://exchange.xforce.ibmcloud.com/vulnerabilities/64496
https://patchwork.kernel.org/patch/363282/

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