CVE-2018-14641

A security flaw was found in the ip_frag_reasm() function in net/ipv4/ip_fragment.c in the Linux kernel from 4.19-rc1 to 4.19-rc3 inclusive, which can cause a later system crash in ip_do_fragment(). With certain non-default, but non-rare, configuration of a victim host, an attacker can trigger this crash remotely, thus leading to a remote denial-of-service.

Weakness

The product does not initialize critical variables, which causes the execution environment to use unexpected values.

Affected Software

Potential Mitigations

References

• https://access.redhat.com/errata/RHSA-2018:2948
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14641
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5d407b071dc369c26a38398326ee2be53651cfe4
• https://seclists.org/oss-sec/2018/q3/248
• https://access.redhat.com/errata/RHSA-2018:2948
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14641
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5d407b071dc369c26a38398326ee2be53651cfe4
• https://seclists.org/oss-sec/2018/q3/248