[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date: Tue, 9 Aug 2022 14:13:40 -0300
From: Thadeu Lima de Souza Cascardo <cascardo@...onical.com>
To: oss-security@...ts.openwall.com
Subject: CVE-2022-2585 - Linux kernel POSIX CPU timer UAF
CVE-2022-2585 - Linux kernel POSIX CPU timer UAF
It was discovered that when exec'ing from a non-leader thread, armed POSIX
CPU timers would be left on a list but freed, leading to a use-after-free.
An independent security researcher working with SSD Secure Disclosure
discovered that this vulnerability could be exploited for Local Privilege
Escalation.
This bug was introduced by commit 55e8c8eb2c7b ("posix-cpu-timers: Store a
reference to a pid not a task"), which is present since v5.7-rc1.
This has been assigned CVE-2022-2585.
A PoC that will trigger KASAN is going to be posted in a week.
A fix has been sent to linux-kernel@...r.kernel.org and is at
https://lore.kernel.org/lkml/20220809170751.164716-1-cascardo@canonical.com/T/#u.
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
