Description
The __skb_recv_datagram function in net/core/datagram.c in the Linux kernel before 3.8 does not properly handle the MSG_PEEK flag with zero-length data, which allows local users to cause a denial of service (infinite loop and system hang) via a crafted application.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +11 | 3.6.11-rt30.25.el6rt | RHSA-2013:0622 |
Advisories 1
- RHSA-2013:0622 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
References
- MDVSA-2013:176 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=911473
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=77c1090f94d1b0b5186fb13a1b71b47b1343f87f
- https://github.com/torvalds/linux/commit/77c1090f94d1b0b5186fb13a1b71b47b1343f87f
- http://www.kernel.org/pub/linux/kernel/v3.x/patch-3.8.bz2
- [oss-security] 20130214 Re: CVE Request: kernel -- local DOS (endless loop with interrupts disabled) mailing-list
- openSUSE-SU-2013:1042 vendor-advisory
- openSUSE-SU-2013:0951 vendor-advisory