CVE-2026-89527

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: svcrdma: Use svc_xprt_put to free listener on create failure svc_rdma_create() calls kfree(cma_xprt) when svc_rdma_create_listen_id() fails. svc_xprt_init() has already acquired a net namespace reference via get_net_track(); kfree bypasses svc_xprt_free() which releases it. Replace the kfree() with svc_xprt_put() so the kref_init birth reference drops to zero and svc_xprt_free() dispatches svc_rdma_free() to clean up properly. sc_cm_id is still NULL at that point; the preceding patch added the necessary NULL guard in svc_rdma_free(). svc_xprt_free() also drops the module reference via module_put(), but the caller _svc_xprt_create() does the same on xpo_create failure, double-putting the single try_module_get() it acquired. Take a compensating __module_get() before the svc_xprt_put() to keep the count balanced, matching the convention in svc_rdma_accept()'s error path.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-11 20:19:35.503000

Last modified

2026-10-30 13:20:18.543000

View original CVE JSON

{
  "id": "CVE-2026-89527",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-11T20:19:35.503",
  "lastModified": "2026-10-30T13:20:18.543",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsvcrdma: Use svc_xprt_put to free listener on create failure\n\nsvc_rdma_create() calls kfree(cma_xprt) when\nsvc_rdma_create_listen_id() fails. svc_xprt_init() has already\nacquired a net namespace reference via get_net_track(); kfree\nbypasses svc_xprt_free() which releases it.\n\nReplace the kfree() with svc_xprt_put() so the kref_init birth\nreference drops to zero and svc_xprt_free() dispatches\nsvc_rdma_free() to clean up properly. sc_cm_id is still NULL\nat that point; the preceding patch added the necessary NULL\nguard in svc_rdma_free().\n\nsvc_xprt_free() also drops the module reference via\nmodule_put(), but the caller _svc_xprt_create() does the same\non xpo_create failure, double-putting the single\ntry_module_get() it acquired. Take a compensating\n__module_get() before the svc_xprt_put() to keep the count\nbalanced, matching the convention in svc_rdma_accept()'s error\npath."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "net/sunrpc/xprtrdma/svc_rdma_transport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "4fb8518bdac8e85f6580ea3f586adf396cd472bc",
              "lessThan": "31b8293495ba94ccf494e556a318886b716884b6",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4fb8518bdac8e85f6580ea3f586adf396cd472bc",
              "lessThan": "2e35ec558b8cece9399a50141ecaeadbdb8768dc",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4fb8518bdac8e85f6580ea3f586adf396cd472bc",
              "lessThan": "ee70d690b5544b736706a9a5796aafb634013f54",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4fb8518bdac8e85f6580ea3f586adf396cd472bc",
              "lessThan": "e68380710fc970e07610b2f42594575ad35fdb1c",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4fb8518bdac8e85f6580ea3f586adf396cd472bc",
              "lessThan": "ac1dd6002f758ab7dd3e737757e5a1bb1c0b38d6",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4fb8518bdac8e85f6580ea3f586adf396cd472bc",
              "lessThan": "e346ef7bcb137f50c49f969330ab7dcf64ea1654",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "net/sunrpc/xprtrdma/svc_rdma_transport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "2.6.37",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "2.6.37",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.113",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.56",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.4",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2e35ec558b8cece9399a50141ecaeadbdb8768dc",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/31b8293495ba94ccf494e556a318886b716884b6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ac1dd6002f758ab7dd3e737757e5a1bb1c0b38d6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e346ef7bcb137f50c49f969330ab7dcf64ea1654",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e68380710fc970e07610b2f42594575ad35fdb1c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ee70d690b5544b736706a9a5796aafb634013f54",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}