Bug 2078466 (CVE-2022-1462) - CVE-2022-1462 kernel: possible race condition in drivers/tty/tty_buffers.c
Summary: CVE-2022-1462 kernel: possible race condition in drivers/tty/tty_buffers.c
Keywords:
Status: NEW
Alias: CVE-2022-1462
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2078867 2078868 2078869 2078870 2090713
Blocks: 2078422 2078496
TreeView+ depends on / blocked
 
Reported: 2022-04-25 12:05 UTC by Marian Rehak
Modified: 2022-12-31 23:34 UTC (History)
53 users (show)

Fixed In Version: kernel 5.5 rc5
Doc Type: If docs needed, set a value
Doc Text:
An out-of-bounds read flaw was found in the Linux kernel’s TeleTYpe subsystem. The issue occurs in how a user triggers a race condition using ioctls TIOCSPTLCK and TIOCGPTPEER and TIOCSTI and TCXONC with leakage of memory in the flush_to_ldisc function. This flaw allows a local user to crash the system or read unauthorized random data from memory.
Clone Of:
Environment:
Last Closed:

Attachments (Terms of Use)

Description Marian Rehak 2022-04-25 12:05:53 UTC 
A possible race condition vulnerability in drivers/tty/tty_buffers.c
Comment 6 Marian Rehak 2022-05-26 12:22:41 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2090713]
Comment 7 John Haxby 2022-05-27 11:05:54 UTC 
According to https://www.openwall.com/lists/oss-security/2022/04/21/1 this is actually a concurrency use-after-free in vgem_gem_dumb_create.
Comment 8 John Haxby 2022-05-27 11:40:57 UTC 
Sorry, please ignore that.   I'm totally confused.
Comment 9 Justin M. Forbes 2022-05-30 16:16:12 UTC 
This was fixed in Fedora with the 5.5.5 stable kenrel updates.
Note You need to log in before you can comment on or make changes to this bug.