VULNERABILITY

Debian: CVE-2025-21972: linux -- security update

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Debian: CVE-2025-21972: linux -- security update

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
04/01/2025
Created
05/16/2025
Added
05/15/2025
Modified
05/15/2025

Description

In the Linux kernel, the following vulnerability has been resolved: net: mctp: unshare packets when reassembling Ensure that the frag_list used for reassembly isn't shared with other packets. This avoids incorrect reassembly when packets are cloned, and prevents a memory leak due to circular references between fragments and their skb_shared_info. The upcoming MCTP-over-USB driver uses skb_clone which can trigger the problem - other MCTP drivers don't share SKBs. A kunit test is added to reproduce the issue.

Solution(s)

  • no-fix-debian-deb-package

References

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