CVE-2026-43120 (GCVE-0-2026-43120)
Vulnerability from cvelistv5
Published
2026-05-06 07:40
Modified
2026-05-23 16:06
Severity ?
VLAI Severity ?
EPSS score ?
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")
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 715fdb3b30541cc8180b7cdc6aa9f8c307afdf25 Version: 5ac388db27c443dadfbb0b8b23fa7ccf429d901a Version: 5ac388db27c443dadfbb0b8b23fa7ccf429d901a Version: 5ac388db27c443dadfbb0b8b23fa7ccf429d901a Version: 5ac388db27c443dadfbb0b8b23fa7ccf429d901a Version: 6.6.120 ≤ |
||
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"versions": [
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{
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"version": "6.18.24",
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},
{
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"status": "unaffected",
"version": "6.19.14",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
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"nodes": [
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{
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{
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"negate": false,
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/irdma: Fix double free related to rereg_user_mr\n\nIf IB_MR_REREG_TRANS is set during rereg_user_mr, the\numem will be released and a new one will be allocated\nin irdma_rereg_mr_trans. If any step of irdma_rereg_mr_trans\nfails after the new umem is allocated, it releases the umem,\nbut does not set iwmr-\u003eregion to NULL. The problem is that\nthis failure is propagated to the user, who will then call\nibv_dereg_mr (as they should). Then, the dereg_mr path will\nsee a non-NULL umem and attempt to call ib_umem_release again.\n\nFix this by setting iwmr-\u003eregion to NULL after ib_umem_release.\n\nFixed: 5ac388db27c4 (\"RDMA/irdma: Add support to re-register a memory region\")"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-23T16:06:19.328Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
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"url": "https://git.kernel.org/stable/c/62298a48f8b8788ad8b8464e6ffdf1ddebd2217e"
},
{
"url": "https://git.kernel.org/stable/c/66964118f1f50ed85001c8fc9f7ab5bbdd021ee0"
},
{
"url": "https://git.kernel.org/stable/c/0f22c32141acdcda266b26cab2b830baf870f3e0"
},
{
"url": "https://git.kernel.org/stable/c/0c5d70bcb9d2275a1c8515a924016fcfeb4ab441"
},
{
"url": "https://git.kernel.org/stable/c/29a3edd7004bb635d299fb9bc6f0ea4ef13ed5a2"
}
],
"title": "RDMA/irdma: Fix double free related to rereg_user_mr",
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"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-43120",
"datePublished": "2026-05-06T07:40:43.923Z",
"dateReserved": "2026-05-01T14:12:55.987Z",
"dateUpdated": "2026-05-23T16:06:19.328Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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