Vulnerability-Lookup

FKIE_CVE-2026-46053

Vulnerability from fkie_nvd - Published: 2026-05-27 14:17 - Updated: 2026-06-17 10:52

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: net: rds: fix MR cleanup on copy error __rds_rdma_map() hands sg/pages ownership to the transport after get_mr() succeeds. If copying the generated cookie back to user space fails after that point, the error path must not free those resources again before dropping the MR reference. Remove the duplicate unpin/free from the put_user() failure branch so that MR teardown is handled only through the existing final cleanup path.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/033370ffb3c9c0264d19f8ba9ef769523266589a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/106dc689206610cfa2098f593fdd1e020c997835	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8141a2dc70080eda1aedc0389ed2db2b292af5bd	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8fdbb6262a4a3ed44a0830a7793903b54bb27bdc	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/91a44b406bc1f9e1c5da0cb7d0d5991b43b79147	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b3cb8cae530b2727d8245684148bb49425f6765c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d95cea9298be1ba8876e3f156be96d3a492085ca	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ec55a86f7fba7d9111df94b9c11a4755ed492995	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	5.6
linux	linux_kernel	5.6
linux	linux_kernel	5.6
linux	linux_kernel	5.6
linux	linux_kernel	5.6
linux	linux_kernel	5.6

JSON

To clipboard

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    }
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  "lastModified": "2026-06-17T10:52:59.187",
  "metrics": {
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      {
        "cvssData": {
          "attackComplexity": "LOW",
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          "confidentialityImpact": "HIGH",
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}

CVE-2026-46053 (GCVE-0-2026-46053)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:57 – Updated: 2026-08-05 12:29

Title

net: rds: fix MR cleanup on copy error

Summary

Severity

7.8 (High)


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

Assigner

Linux CNA under the mitre root

CNA scorecard D 54/100 over 6618 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/91a44b406bc1f9e1c…
https://git.kernel.org/stable/c/106dc689206610cfa…
https://git.kernel.org/stable/c/ec55a86f7fba7d911…
https://git.kernel.org/stable/c/8fdbb6262a4a3ed44…
https://git.kernel.org/stable/c/d95cea9298be1ba88…
https://git.kernel.org/stable/c/033370ffb3c9c0264…
https://git.kernel.org/stable/c/b3cb8cae530b2727d…
https://git.kernel.org/stable/c/8141a2dc70080eda1…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0d4597c8c5abdeeaf50774066c16683f30184dc8 , < 91a44b406bc1f9e1c5da0cb7d0d5991b43b79147 (git) Affected: 0d4597c8c5abdeeaf50774066c16683f30184dc8 , < 106dc689206610cfa2098f593fdd1e020c997835 (git) Affected: 0d4597c8c5abdeeaf50774066c16683f30184dc8 , < ec55a86f7fba7d9111df94b9c11a4755ed492995 (git) Affected: 0d4597c8c5abdeeaf50774066c16683f30184dc8 , < 8fdbb6262a4a3ed44a0830a7793903b54bb27bdc (git) Affected: 0d4597c8c5abdeeaf50774066c16683f30184dc8 , < d95cea9298be1ba8876e3f156be96d3a492085ca (git) Affected: 0d4597c8c5abdeeaf50774066c16683f30184dc8 , < 033370ffb3c9c0264d19f8ba9ef769523266589a (git) Affected: 0d4597c8c5abdeeaf50774066c16683f30184dc8 , < b3cb8cae530b2727d8245684148bb49425f6765c (git) Affected: 0d4597c8c5abdeeaf50774066c16683f30184dc8 , < 8141a2dc70080eda1aedc0389ed2db2b292af5bd (git)
Linux	Linux	Affected: 5.6 Unaffected: 0 , < 5.6 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.86 , ≤ 6.12.* (semver) Unaffected: 6.18.27 , ≤ 6.18.* (semver) Unaffected: 7.0.4 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
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        {
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.140",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.86",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.27",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.4",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: rds: fix MR cleanup on copy error\n\n__rds_rdma_map() hands sg/pages ownership to the transport after\nget_mr() succeeds. If copying the generated cookie back to user space\nfails after that point, the error path must not free those resources\nagain before dropping the MR reference.\n\nRemove the duplicate unpin/free from the put_user() failure branch so\nthat MR teardown is handled only through the existing final cleanup\npath."
        }
      ],
      "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"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is triggered through the local `setsockopt(SOL_RDS, RDS_GET_MR/RDS_GET_MR_FOR_DEST)` syscall on an RDS socket (MR-registration control plane); it is not reachable from a remote peer\u0027s network packets.\nAC:L - Once an RDMA-capable RDS socket is bound, the double-free is 100% deterministic and the attacker fully controls the trigger by supplying a bad `cookie_addr` so `put_user()` faults; there is no race or attacker-uncontrolled condition.\nPR:L - Creating an AF_RDS socket has no capability check (module auto-loads) and `can_do_mlock()` passes for normal users by default, so any unprivileged local user on a host with RDMA hardware can reach the path.\nUI:N - The attacker triggers the entire sequence with its own syscalls; no action by another user or victim is required.\nS:U - The double-free corrupts the kernel slab/page allocator within the kernel\u0027s own security authority and does not cross a virtualization or IOMMU boundary.\nC:H - The double-free of the `sg` slab object and the page-refcount underflow yield use-after-free/cross-object primitives that can be groomed into arbitrary kernel-memory reads, enabling significant information disclosure.\nI:H - A double `kfree()` corrupts the SLUB freelist and the page-refcount underflow allows reuse of an in-use physical page, both classic primitives for arbitrary kernel write and privilege escalation.\nA:H - The double-free and page-refcount underflow readily cause heap corruption, freelist poisoning, and kernel panic/oops."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:29:21.209Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/91a44b406bc1f9e1c5da0cb7d0d5991b43b79147"
        },
        {
          "url": "https://git.kernel.org/stable/c/106dc689206610cfa2098f593fdd1e020c997835"
        },
        {
          "url": "https://git.kernel.org/stable/c/ec55a86f7fba7d9111df94b9c11a4755ed492995"
        },
        {
          "url": "https://git.kernel.org/stable/c/8fdbb6262a4a3ed44a0830a7793903b54bb27bdc"
        },
        {
          "url": "https://git.kernel.org/stable/c/d95cea9298be1ba8876e3f156be96d3a492085ca"
        },
        {
          "url": "https://git.kernel.org/stable/c/033370ffb3c9c0264d19f8ba9ef769523266589a"
        },
        {
          "url": "https://git.kernel.org/stable/c/b3cb8cae530b2727d8245684148bb49425f6765c"
        },
        {
          "url": "https://git.kernel.org/stable/c/8141a2dc70080eda1aedc0389ed2db2b292af5bd"
        }
      ],
      "title": "net: rds: fix MR cleanup on copy error",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46053",
    "datePublished": "2026-05-27T12:57:11.870Z",
    "dateReserved": "2026-05-13T15:03:33.094Z",
    "dateUpdated": "2026-08-05T12:29:21.209Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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FKIE_CVE-2026-46053

CVE-2026-46053 (GCVE-0-2026-46053)

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Sightings

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