Bug 2357143 (CVE-2025-21997)

Summary: CVE-2025-21997 kernel: xsk: fix an integer overflow in xp_create_and_assign_umem()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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OS: Linux   
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Description OSIDB Bzimport 2025-04-03 08:01:49 UTC 
In the Linux kernel, the following vulnerability has been resolved:

xsk: fix an integer overflow in xp_create_and_assign_umem()

Since the i and pool->chunk_size variables are of type 'u32',
their product can wrap around and then be cast to 'u64'.
This can lead to two different XDP buffers pointing to the same
memory area.

Found by InfoTeCS on behalf of Linux Verification Center
(linuxtesting.org) with SVACE.
Comment 1 Avinash Hanwate 2025-04-03 09:02:08 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025040348-CVE-2025-21997-492c@gregkh/T
Comment 3 errata-xmlrpc 2025-06-09 07:19:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:8643 https://access.redhat.com/errata/RHSA-2025:8643
Comment 4 errata-xmlrpc 2025-06-09 12:55:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2025:8669 https://access.redhat.com/errata/RHSA-2025:8669