A flaw was found in the Linux kernel's implementation of Userspace core dumps. This flaw allows an attacker with a local account to crash a trivial program and exfiltrate private kernel data.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-10732
• google/kmsan#76
• ruscur/linux@a95cdec
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10732
• https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=aca969cacf07f41070d788ce2b8ca71f09d5207d
• https://lore.kernel.org/lkml/CAG_fn=VZZ7yUxtOGzuTLkr7wmfXWtKK9BHHYawj=rt9XWnCYvg@mail.gmail.com/
• https://security.netapp.com/advisory/ntap-20210129-0005/
• https://twitter.com/grsecurity/status/1252558055629299712
• https://usn.ubuntu.com/4411-1/
• https://usn.ubuntu.com/4427-1/
• https://usn.ubuntu.com/4439-1/
• https://usn.ubuntu.com/4440-1/
• https://usn.ubuntu.com/4485-1/
• http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html
• https://access.redhat.com/errata/RHSA-2020:4060
• https://access.redhat.com/errata/RHSA-2020:4062
• https://access.redhat.com/errata/RHSA-2020:4431
• https://access.redhat.com/errata/RHSA-2020:4609
• https://access.redhat.com/security/cve/CVE-2020-10732
• https://bugzilla.redhat.com/show_bug.cgi?id=1831399
• https://lore.kernel.org/lkml/CAG_fn=VZZ7yUxtOGzuTLkr7wmfXWtKK9BHHYawj=rt9XWnCYvg%40mail.gmail.com/