Improper input validation in Linux Kernel
CVE-2017-7979
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.004 (32.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux Linux_kernel — versions 4.11
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Patch, Mailing List, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Patch, x_refsource_MISC, Issue Tracking)
- cve@mitre.org (Patch, x_refsource_MISC, Issue Tracking)
- cve@mitre.org (Patch, Mailing List, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Patch, Mailing List, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Patch, Mailing List, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Patch, Mailing List, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (vdb-entry, x_refsource_BID)
Frequently asked questions
- What is CVE-2017-7979?
- CVE-2017-7979 is a high-severity vulnerability in Linux Kernel, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2017-04-19.
- How severe is CVE-2017-7979?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2017-7979 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.