CVE-2019-15239

HIGH 7.8EPSS 0.6%

In the Linux kernel, a certain net/ipv4/tcp_output.c change, which was properly incorporated into 4.16.12, was incorrectly backported to the earlier longterm kernels, introducing a new vulnerability that was potentially more severe than the issue that was intended to be fixed by backporting. Specifically, by adding to a write queue between disconnection and re-connection, a local attacker can trigger multiple use-after-free conditions. This can result in a kernel crash, or potentially in privilege escalation. NOTE: this affects (for example) Linux distributions that use 4.9.x longterm kernels before 4.9.190 or 4.14.x longterm kernels before 4.14.139.

CVSS v3.0 NVD: 7.8 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0 NVD: 7.2 HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C
EPSS: 0.59% chance of exploitation in the next 30 days, 47th percentile
Published: 2019-08-20
Updated: 2024-08-05

Proof-of-concept exploits (1)

https://pulsesecurity.co.nz/advisories/linux-kernel-4.9-tcpsocketsuaf

CVE-2019-15239

Proof-of-concept exploits (1)

Security advisories

References