Bug 2103681 (CVE-2022-2959) - CVE-2022-2959 kernel: watch queue race condition can lead to privilege escalation [NEEDINFO]
Summary: CVE-2022-2959 kernel: watch queue race condition can lead to privilege escala...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2022-2959
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2115232 2115233 2141630 2141631 2141632 2141633 2141634 2141635 2141636 2141637
Blocks: 2103682
TreeView+ depends on / blocked
 
Reported: 2022-07-04 13:43 UTC by Mauro Matteo Cascella
Modified: 2023-05-30 16:32 UTC (History)
60 users (show)

Fixed In Version: kernel 5.19
Doc Type: If docs needed, set a value
Doc Text:
A race condition was found in the Linux kernel's watch queue due to a missing lock in the pipe_resize_ring(). The race condition occurs when a thread uses ioctl(IOC_WATCH_QUEUE_SET_SIZE) to resize the pipe buffer and free the old pipe buffer, while another thread uses keyctl() to trigger a notification in the watch queue, calling post_one_notification() and accessing the freed pipe buffer. This flaw allows a local user to crash the system or escalate their privileges on the system.
Clone Of:
Environment:
Last Closed: 2023-01-25 08:22:16 UTC
Embargoed:
ikent: needinfo? (dhowells)

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2022:9021 0 None None None 2022-12-14 12:03:02 UTC
Red Hat Product Errata RHSA-2022:8973 0 None None None 2022-12-13 16:05:53 UTC
Red Hat Product Errata RHSA-2022:8974 0 None None None 2022-12-13 16:06:33 UTC
Red Hat Product Errata RHSA-2022:9082 0 None None None 2022-12-15 16:24:35 UTC
Red Hat Product Errata RHSA-2023:0300 0 None None None 2023-01-23 15:17:00 UTC
Red Hat Product Errata RHSA-2023:0334 0 None None None 2023-01-23 15:21:33 UTC
Red Hat Product Errata RHSA-2023:0348 0 None None None 2023-01-23 15:23:10 UTC

Description Mauro Matteo Cascella 2022-07-04 13:43:36 UTC 
A race condition was found in the Linux kernel's watch queue due to a missing lock in pipe_resize_ring(). The race condition may happen when thread (A) uses ioctl(IOC_WATCH_QUEUE_SET_SIZE) to resize the pipe buffer and free the old pipe buffer, while another thread (B) uses keyctl() to trigger a notification in the watch queue, calling post_one_notification() and accessing the freed pipe buffer.

ZDI advisory:
https://www.zerodayinitiative.com/advisories/ZDI-22-1165/

Upstream fix:
https://github.com/torvalds/linux/commit/189b0ddc245139af81198d1a3637cac74f96e13a
Comment 9 errata-xmlrpc 2022-12-13 16:05:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Extended Update Support

Via RHSA-2022:8973 https://access.redhat.com/errata/RHSA-2022:8973
Comment 10 errata-xmlrpc 2022-12-13 16:06:28 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Extended Update Support

Via RHSA-2022:8974 https://access.redhat.com/errata/RHSA-2022:8974
Comment 11 errata-xmlrpc 2022-12-15 16:24:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Extended Update Support

Via RHSA-2022:9082 https://access.redhat.com/errata/RHSA-2022:9082
Comment 13 errata-xmlrpc 2023-01-23 15:16:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:0300 https://access.redhat.com/errata/RHSA-2023:0300
Comment 14 errata-xmlrpc 2023-01-23 15:21:27 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:0334 https://access.redhat.com/errata/RHSA-2023:0334
Comment 15 errata-xmlrpc 2023-01-23 15:23:05 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:0348 https://access.redhat.com/errata/RHSA-2023:0348
Comment 16 Product Security DevOps Team 2023-01-25 08:22:11 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2022-2959
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