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RDMA/core: Fix potential use after free in ib_free_cq()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Fix potential use after free in ib_free_cq() When accessing a CQ via the netlink path the only synchronization mechanism for the said CQ is rdma_restrack_get(). Currently, rdma_restrack_del() is invoked at the end of ib_free_cq(), which is too late, since by that point vendor-specific resources associated with the CQ might already be freed. This can leave a short window where the CQ remains accessible through restrack, leading to a potential use-after-free. Fix this by moving the rdma_restrack_del() call to be before the freeing of the vendor-specific resources ensuring that the CQ is removed from restrack before its internal resources are released. This guarantees that no new users hold references to a CQ that is in the process of destruction.

Announced Source revision 1
Original source ↗

CVE-2026-92508

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-92508

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "43d781b9fa562f0c6e50f62c870fbfeb9dc85213",
        "lessThan": "a804b162f9bc2b38b2ed1b4752eea9faadb1645b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43d781b9fa562f0c6e50f62c870fbfeb9dc85213",
        "lessThan": "91f8a17a22ab615a03743120e19935e731f28fb9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43d781b9fa562f0c6e50f62c870fbfeb9dc85213",
        "lessThan": "76f2cb4f721815c3b6262a6dc2151de88646924c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43d781b9fa562f0c6e50f62c870fbfeb9dc85213",
        "lessThan": "b8dcca427096fc9c50f1b376847fea72bc842d31",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43d781b9fa562f0c6e50f62c870fbfeb9dc85213",
        "lessThan": "9abea37942534eeb049335476178696b654b000c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43d781b9fa562f0c6e50f62c870fbfeb9dc85213",
        "lessThan": "43403fe45379c64fa6276e5a8ede44493e5d2d3d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43d781b9fa562f0c6e50f62c870fbfeb9dc85213",
        "lessThan": "29dc2f8e1c97372c2871a70088707933515fbd5b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7ac277a01f9017fcde4f3f81670c995992945433",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "093f87dda065e0f618dd577985eccbe85efb9b54",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5.8.17",
        "lessThan": "5.9",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.9.2",
        "lessThan": "5.10",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "drivers/infiniband/core/cq.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.10"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.10",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.52",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/infiniband/core/cq.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-92508

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#37757 · Revision 1
Added to Heist Feed
Publisher date
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