VULNERABILITY

Debian: CVE-2025-37838: linux -- security update

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Debian: CVE-2025-37838: linux -- security update

Severity
7
CVSS
(AV:L/AC:M/Au:S/C:C/I:C/A:C)
Published
04/18/2025
Created
04/29/2025
Added
04/29/2025
Modified
04/29/2025

Description

In the Linux kernel, the following vulnerability has been resolved: HSI: ssi_protocol: Fix use after free vulnerability in ssi_protocol Driver Due to Race Condition In the ssi_protocol_probe() function, &ssi->work is bound with ssip_xmit_work(), In ssip_pn_setup(), the ssip_pn_xmit() function within the ssip_pn_ops structure is capable of starting the work. If we remove the module which will call ssi_protocol_remove() to make a cleanup, it will free ssi through kfree(ssi), while the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows: CPU0 CPU1 | ssip_xmit_work ssi_protocol_remove | kfree(ssi); | | struct hsi_client *cl = ssi->cl; | // use ssi Fix it by ensuring that the work is canceled before proceeding with the cleanup in ssi_protocol_remove().

Solution(s)

  • debian-upgrade-linux

References

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