CVE-2011-2525

Published: 06 October 2011

The qdisc_notify function in net/sched/sch_api.c in the Linux kernel before 2.6.35 does not prevent tc_fill_qdisc function calls referencing builtin (aka CQ_F_BUILTIN) Qdisc structures, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) or possibly have unspecified other impact via a crafted call.

From the Ubuntu security team

Ben Pfaff discovered that Classless Queuing Disciplines (qdiscs) were being incorrectly handled. A local attacker could exploit this to crash the system, leading to a denial of service.

Priority

Medium

CVSS 3 base score: 7.8

Status

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2525
• http://kerneltrap.org/mailarchive/linux-netdev/2010/5/21/6277805
• http://www.debian.org/security/2011/dsa-2303
• https://ubuntu.com/security/notices/USN-1241-1
• https://ubuntu.com/security/notices/USN-1256-1
• https://ubuntu.com/security/notices/USN-1268-1
• https://ubuntu.com/security/notices/USN-1269-1
• https://ubuntu.com/security/notices/USN-1274-1
• https://ubuntu.com/security/notices/USN-1286-1
• NVD
• Launchpad
• Debian

Bugs

• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-2525
• https://launchpad.net/bugs/869250