Bug 2516490 (CVE-2026-72102)

Summary: CVE-2026-72102 kernel: dm_early_create: fix freeing used table on dm_resume failure
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's device mapper (DM) subsystem. During certain resume operations, the kernel might attempt to free a memory table that has already been released. This error, known as a double-free vulnerability, can lead to memory corruption. A successful exploit could result in a system crash, causing a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-15 06:15:15 UTC 
In the Linux kernel, the following vulnerability has been resolved:

dm_early_create: fix freeing used table on dm_resume failure

If dm_resume fails, the kernel attempts to free table with
dm_table_destroy, but the table was already instantiated with
dm_swap_table. This commit skips the call to dm_table_destroy in this
case.
Comment 1 Keith Grant 2026-08-17 21:46:01 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081525-CVE-2026-72102-cdcd@gregkh/T
Comment 2 Jon Orris 2026-09-17 05:45:23 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:68507 https://access.redhat.com/errata/RHSA-2026:68507
Comment 3 Jon Orris 2026-09-17 12:16:29 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:68570 https://access.redhat.com/errata/RHSA-2026:68570