RDMA/irdma: Fix double free related to rereg_user_mr

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Summary

CVECVE-2026-43120
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-06 10:16:25 UTC
Updated2026-05-12 21:37:37 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: RDMA/irdma: Fix double free related to rereg_user_mr If IB_MR_REREG_TRANS is set during rereg_user_mr, the umem will be released and a new one will be allocated in irdma_rereg_mr_trans. If any step of irdma_rereg_mr_trans fails after the new umem is allocated, it releases the umem, but does not set iwmr->region to NULL. The problem is that this failure is propagated to the user, who will then call ibv_dereg_mr (as they should). Then, the dereg_mr path will see a non-NULL umem and attempt to call ib_umem_release again. Fix this by setting iwmr->region to NULL after ib_umem_release. Fixed: 5ac388db27c4 ("RDMA/irdma: Add support to re-register a memory region")

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000130000 probability, percentile 0.023990000 (date 2026-05-12)

Problem Types: CWE-415

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 715fdb3b30541cc8180b7cdc6aa9f8c307afdf25 62298a48f8b8788ad8b8464e6ffdf1ddebd2217e git Not specified
CNA Linux Linux affected 5ac388db27c443dadfbb0b8b23fa7ccf429d901a 66964118f1f50ed85001c8fc9f7ab5bbdd021ee0 git Not specified
CNA Linux Linux affected 5ac388db27c443dadfbb0b8b23fa7ccf429d901a 0f22c32141acdcda266b26cab2b830baf870f3e0 git Not specified
CNA Linux Linux affected 5ac388db27c443dadfbb0b8b23fa7ccf429d901a 0c5d70bcb9d2275a1c8515a924016fcfeb4ab441 git Not specified
CNA Linux Linux affected 5ac388db27c443dadfbb0b8b23fa7ccf429d901a 29a3edd7004bb635d299fb9bc6f0ea4ef13ed5a2 git Not specified
CNA Linux Linux affected 6.7 Not specified
CNA Linux Linux unaffected 6.7 semver Not specified
CNA Linux Linux unaffected 6.6.136 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.83 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.24 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.14 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/29a3edd7004bb635d299fb9bc6f0ea4ef13ed5a2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0c5d70bcb9d2275a1c8515a924016fcfeb4ab441 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0f22c32141acdcda266b26cab2b830baf870f3e0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/62298a48f8b8788ad8b8464e6ffdf1ddebd2217e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/66964118f1f50ed85001c8fc9f7ab5bbdd021ee0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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