CVE-2026-43120 (GCVE-0-2026-43120)

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-11 22:18
VLAI?
Title
RDMA/irdma: Fix double free related to rereg_user_mr
Summary
In 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")
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 715fdb3b30541cc8180b7cdc6aa9f8c307afdf25 , < 62298a48f8b8788ad8b8464e6ffdf1ddebd2217e (git)
Affected: 5ac388db27c443dadfbb0b8b23fa7ccf429d901a , < 66964118f1f50ed85001c8fc9f7ab5bbdd021ee0 (git)
Affected: 5ac388db27c443dadfbb0b8b23fa7ccf429d901a , < 0f22c32141acdcda266b26cab2b830baf870f3e0 (git)
Affected: 5ac388db27c443dadfbb0b8b23fa7ccf429d901a , < 0c5d70bcb9d2275a1c8515a924016fcfeb4ab441 (git)
Affected: 5ac388db27c443dadfbb0b8b23fa7ccf429d901a , < 29a3edd7004bb635d299fb9bc6f0ea4ef13ed5a2 (git)
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Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.6.136 , ≤ 6.6.* (semver)
Unaffected: 6.12.83 , ≤ 6.12.* (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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