The assoc_array_insert_into_terminal_node function in lib/assoc_array.c in the Linux kernel before 4.13.11 mishandles node splitting, which allows local users to cause a denial of service (NULL pointer dereference and panic) via a crafted application, as demonstrated by the keyring key type, and key addition and link creation operations.
[
{
"product": "Linux kernel since 3.13 up to 4.14 (not including)",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "Linux kernel since 3.13 up to 4.14 (not including)"
}
]
}
]
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ea6789980fdaa610d7eb63602c746bf6ec70cd2b
www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.11
www.securityfocus.com/bid/101678
access.redhat.com/errata/RHSA-2018:0151
bugzilla.redhat.com/show_bug.cgi?id=1501215
github.com/torvalds/linux/commit/ea6789980fdaa610d7eb63602c746bf6ec70cd2b
usn.ubuntu.com/3698-1/
usn.ubuntu.com/3698-2/