Bugzilla – Bug 1227996
VUL-0: CVE-2022-48786: kernel: vsock: remove vsock from connected table when connect is interrupted by a signal
Last modified: 2024-07-19 14:21:35 UTC
In the Linux kernel, the following vulnerability has been resolved: vsock: remove vsock from connected table when connect is interrupted by a signal vsock_connect() expects that the socket could already be in the TCP_ESTABLISHED state when the connecting task wakes up with a signal pending. If this happens the socket will be in the connected table, and it is not removed when the socket state is reset. In this situation it's common for the process to retry connect(), and if the connection is successful the socket will be added to the connected table a second time, corrupting the list. Prevent this by calling vsock_remove_connected() if a signal is received while waiting for a connection. This is harmless if the socket is not in the connected table, and if it is in the table then removing it will prevent list corruption from a double add. Note for backporting: this patch requires d5afa82c977e ("vsock: correct removal of socket from the list"), which is in all current stable trees except 4.9.y. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-48786 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2022/CVE-2022-48786.mbox https://git.kernel.org/stable/c/0bb88f3f7e8d506f3efe46d694964117e20efbfc https://git.kernel.org/stable/c/e3b3939fd137aab6d00d54bee0ee9244b286a608 https://git.kernel.org/stable/c/2910bcb9f67551a45397735e47b6d456eb8cd549 https://git.kernel.org/stable/c/5f326fe2aef411a6575628f92bd861463ea91df7 https://git.kernel.org/stable/c/87cd1bbd6677411e17369cd4b7389ab1e1fdba44 https://git.kernel.org/stable/c/787468ee7a435777521d33399d012fd591ae2f94 https://git.kernel.org/stable/c/addd62a8cb6fa90aa322365c62487da61f6baab8 https://git.kernel.org/stable/c/b9208492fcaecff8f43915529ae34b3bcb03877c https://www.cve.org/CVERecord?id=CVE-2022-48786 https://bugzilla.redhat.com/show_bug.cgi?id=2298122