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
EPSS: 0.011 (63.1th percentile) — read the EPSS interpretation.
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.
Affected products
- Linux Linux_kernel
- Canonical Ubuntu_linux — versions 18.04, 18.10
- Unknown 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
- PSIRT-CNA@flexerasoftware.com (x_refsource_MISC, Release Notes, Vendor Advisory)
- PSIRT-CNA@flexerasoftware.com (x_refsource_MISC, Release Notes, Vendor Advisory)
- PSIRT-CNA@flexerasoftware.com (x_refsource_MISC, Broken Link)
- PSIRT-CNA@flexerasoftware.com (Patch, Mailing List, x_refsource_MISC, Vendor Advisory)
- PSIRT-CNA@flexerasoftware.com (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- PSIRT-CNA@flexerasoftware.com (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- PSIRT-CNA@flexerasoftware.com (x_refsource_CONFIRM, 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.