Bug 2150953 (CVE-2022-3565) - CVE-2022-3565 kernel: use-after-free in l1oip timer handlers
Summary: CVE-2022-3565 kernel: use-after-free in l1oip timer handlers
Status: NEW
Alias: CVE-2022-3565
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Nobody
QA Contact:
Depends On: 2150954 2162419 2162420 2162421 2162422
Blocks: 2150724
TreeView+ depends on / blocked
Reported: 2022-12-05 17:30 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-11-09 07:10 UTC (History)
36 users (show)

Fixed In Version: kernel 6.1-rc1
Doc Type: If docs needed, set a value
Doc Text:
A use-after-free flaw was found in the Linux kernel’s ISDN over IP tunnel functionality in how a local user triggers the release_card() function called from l1oip_cleanup(). This flaw allows a local user to crash or potentially escalate their privileges on the system.
Clone Of:
Last Closed:

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2023:6835 0 None None None 2023-11-09 07:10:43 UTC
Red Hat Product Errata RHSA-2023:6583 0 None None None 2023-11-07 08:20:01 UTC

Description Guilherme de Almeida Suckevicz 2022-12-05 17:30:35 UTC
A vulnerability has been found in Linux Kernel. Affected by this issue is the function del_timer of the file drivers/isdn/mISDN/l1oip_core.c of the ISDN (for the ISDN over IP tunnel). The manipulation leads to use after free. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-211088.


Upstream patch:

Comment 1 Guilherme de Almeida Suckevicz 2022-12-05 17:30:59 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2150954]

Comment 2 Justin M. Forbes 2022-12-08 15:39:44 UTC
While ISDN is disabled in Fedora kernels, a patch for this was included in 6.0.3 for users who might be building their own kernels.

Comment 10 errata-xmlrpc 2023-11-07 08:19:58 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:6583 https://access.redhat.com/errata/RHSA-2023:6583

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