CVE-2017-7979

Description

The cookie feature in the packet action API implementation in net/sched/act_api.c in the Linux kernel 4.11.x through 4.11-rc7 mishandles the tb nlattr array, which allows local users to cause a denial of service (uninitialized memory access and refcount underflow, and system hang or crash) or possibly have unspecified other impact via "tc filter add" commands in certain contexts. NOTE: this does not affect stable kernels, such as 4.10.x, from kernel.org.

Category

7.8
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.04%
Third-Party Advisory marc.info Third-Party Advisory marc.info Third-Party Advisory marc.info Third-Party Advisory marc.info Third-Party Advisory marc.info
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://marc.info/?l=linux-netdev&m=149251041420195 mailing list third party advisory patch
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1682368 issue tracking patch
https://bugzilla.proxmox.com/show_bug.cgi?id=1351 issue tracking patch
http://marc.info/?l=linux-netdev&m=149200742616349 mailing list third party advisory patch
http://marc.info/?l=linux-netdev&m=149200746116365 mailing list third party advisory patch
http://marc.info/?l=linux-netdev&m=149251041420194 mailing list third party advisory patch
http://marc.info/?l=linux-netdev&m=149200746116366 mailing list third party advisory patch
http://www.securityfocus.com/bid/97969 vdb entry

Frequently Asked Questions

What is the severity of CVE-2017-7979?
CVE-2017-7979 has been scored as a high severity vulnerability.
How to fix CVE-2017-7979?
To fix CVE-2017-7979, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-7979 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-7979 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.