CVEvulnerability
CVE-2019-15239
7.8 HIGH
Official page ↗
- Status
- Modified
- Published
- 2019-08-20
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.0 ([email protected])
- 7.8 HIGH — CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 7.2 HIGH — AV:L/AC:L/Au:N/C:C/I:C/A:C
- Weaknesses
- CWE-416
Description
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.
Affected configurations
• linux linux kernel 4.16.12
• debian debian linux 9.0
• debian debian linux 10.0
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html lists.opensuse.org
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html lists.opensuse.org
- https://access.redhat.com/errata/RHSA-2019:3978 access.redhat.com
- https://access.redhat.com/errata/RHSA-2019:3979 access.redhat.com
- https://access.redhat.com/errata/RHSA-2020:0027 access.redhat.com
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7f582b248d0a86bae5788c548d7bb5bca6f7691a Patch
- https://lore.kernel.org/stable/41a61a2f87691d2bc839f26cdfe6f5ff2f51e472.camel%40decadent.org.uk/ lore.kernel.org
- https://pulsesecurity.co.nz/advisories/linux-kernel-4.9-tcpsocketsuaf Exploit, Third Party Advisory
- https://salsa.debian.org/kernel-team/kernel-sec/blob/f6273af2d956a87296b6b60379d0a186c9be4bbc/active/CVE-2019-15239 Third Party Advisory
- https://www.debian.org/security/2019/dsa-4497 Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html lists.opensuse.org
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html lists.opensuse.org
- https://access.redhat.com/errata/RHSA-2019:3978 access.redhat.com
- https://access.redhat.com/errata/RHSA-2019:3979 access.redhat.com
- https://access.redhat.com/errata/RHSA-2020:0027 access.redhat.com
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7f582b248d0a86bae5788c548d7bb5bca6f7691a Patch
- https://lore.kernel.org/stable/41a61a2f87691d2bc839f26cdfe6f5ff2f51e472.camel%40decadent.org.uk/ lore.kernel.org
- https://pulsesecurity.co.nz/advisories/linux-kernel-4.9-tcpsocketsuaf Exploit, Third Party Advisory
- https://salsa.debian.org/kernel-team/kernel-sec/blob/f6273af2d956a87296b6b60379d0a186c9be4bbc/active/CVE-2019-15239 Third Party Advisory
- https://www.debian.org/security/2019/dsa-4497 Third Party Advisory