An issue was discovered in the Linux kernel before 5.0.10. There is a use-after-free in the sound subsystem because card disconnection causes certain data structures to be deleted too early. This is related to sound/core/init.c and sound/core/info.c.

References

• https://nvd.nist.gov/vuln/detail/CVE-2019-15214
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.10
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2a3f7221acddfe1caa9ff09b3a8158c39b2fdeac
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8c2f870890fd28e023b0fcf49dcee333f2c8bad7
• https://security.netapp.com/advisory/ntap-20190905-0002/
• https://syzkaller.appspot.com/bug?id=75903e0021cef79bc434d068b5169b599b2a46a9
• https://usn.ubuntu.com/4115-1/
• https://usn.ubuntu.com/4118-1/
• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html
• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
• http://www.openwall.com/lists/oss-security/2019/08/20/2