Use After Free in Linux Kernel
CVE-2019-8956
In the Linux Kernel before versions 4.20.8 and 4.19.21 a use-after-free error in the "sctp_sendmsg()" function (net/sctp/socket.c) when handling SCTP_SENDALL flag can be exploited to corrupt memory.
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: 0.011 (65.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Linux Kernel
- Canonical Ubuntu Linux — versions 18.04, 18.10
- Linux Kernel — versions 4.20.x prior to 4.20.8, 4.19.x prior to 4.19.21
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.21 (Release Notes, Vendor Advisory)
- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.8 (Release Notes, Vendor Advisory)
- secuniaresearch.flexerasoftware.com/secunia_research/2019-5/ (Broken Link)
- git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/ (Patch, Mailing List, Vendor Advisory)
- usn.ubuntu.com/3930-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3930-2/ (vendor-advisory, Third Party Advisory)
- support.f5.com/csp/article/K12671141 (Third Party Advisory)
Frequently asked questions
- What is CVE-2019-8956?
- CVE-2019-8956 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2019-04-01.
- How severe is CVE-2019-8956?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2019-8956 known to be exploited?
- 12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.