Use After Free in Linux Kernel
CVE-2017-11176
The mq_notify function in the Linux kernel through 4.11.9 does not set the sock pointer to NULL upon entry into the retry logic. During a user-space close of a Netlink socket, it allows attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.038 (89.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.036 · newest: 0.038 · change: +0.002
Affected products
- Linux Kernel
- Debian Linux — versions 8.0, 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.debian.org/security/2017/dsa-3927 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:0169 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2918 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2931 (vendor-advisory, Third Party Advisory)
- help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+D… (Third Party Advisory)
- www.securityfocus.com/bid/99919 (VDB Entry, Third Party Advisory, vdb-entry)
- github.com/torvalds/linux/commit/f991af3daabaecff34684fd51fac80319d1baad1 (Patch, Third Party Advisory, Issue Tracking)
- www.debian.org/security/2017/dsa-3945 (vendor-advisory, Third Party Advisory)
- www.exploit-db.com/exploits/45553/ (VDB Entry, Third Party Advisory, exploit)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2017-11176?
- CVE-2017-11176 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2017-07-11.
- How severe is CVE-2017-11176?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2017-11176 known to be exploited?
- 53 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.