FKIE_CVE-2026-98257

Vulnerability from fkie_nvd - Published: 2026-10-06 09:18 - Updated: 2026-10-07 07:17
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: rds: ib: use rds_conn_drop() on protocol version mismatch rds_ib_cm_connect_complete() runs from the RDMA-CM event handler with conn->c_cm_lock held. When the peer negotiates a protocol version older than RDS_PROTOCOL_COMPAT_VERSION, the handler calls rds_conn_destroy(), which is only safe in the rmmod path: it synchronously tears the connection down and flush_work()es the shutdown work cp_down_w. That shutdown work (rds_conn_shutdown()) needs cp_cm_lock, which is the very lock the event handler still holds, so the flush never completes: the two workers wait on each other and the RDS connection workqueues stall for good. All other RDMA-CM failure paths (REJECTED, CONNECT_ERROR, DISCONNECTED) use rds_conn_drop(), which marks the connection RDS_CONN_ERROR and schedules the shutdown work asynchronously. Use it here as well.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/14fb90067d13f4494cff0f03243fae3cf2911cbc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/344c72a0bc2703a6de4918ed935850e07dae3af2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/424019be3f637da76b74f44a40034669acbb166f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/65ca0a5037152a5a80b8fe6aac80eb80458be573
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7d8c22cb2cb1efb5e830a4545c76abf7b35cc2e8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b5c9f2951d330d4a198a64d6e60f79b4bd6ef078
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d392b16acd0908f077289aad8bba066ff16de336
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f97d8c7bab7843631206a114986c9059da03efeb
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/rds/ib_cm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "424019be3f637da76b74f44a40034669acbb166f",
              "status": "affected",
              "version": "f147dd9ecabf23fd63d2562ffe64252a0453ecde",
              "versionType": "git"
            },
            {
              "lessThan": "14fb90067d13f4494cff0f03243fae3cf2911cbc",
              "status": "affected",
              "version": "f147dd9ecabf23fd63d2562ffe64252a0453ecde",
              "versionType": "git"
            },
            {
              "lessThan": "344c72a0bc2703a6de4918ed935850e07dae3af2",
              "status": "affected",
              "version": "f147dd9ecabf23fd63d2562ffe64252a0453ecde",
              "versionType": "git"
            },
            {
              "lessThan": "b5c9f2951d330d4a198a64d6e60f79b4bd6ef078",
              "status": "affected",
              "version": "f147dd9ecabf23fd63d2562ffe64252a0453ecde",
              "versionType": "git"
            },
            {
              "lessThan": "d392b16acd0908f077289aad8bba066ff16de336",
              "status": "affected",
              "version": "f147dd9ecabf23fd63d2562ffe64252a0453ecde",
              "versionType": "git"
            },
            {
              "lessThan": "65ca0a5037152a5a80b8fe6aac80eb80458be573",
              "status": "affected",
              "version": "f147dd9ecabf23fd63d2562ffe64252a0453ecde",
              "versionType": "git"
            },
            {
              "lessThan": "7d8c22cb2cb1efb5e830a4545c76abf7b35cc2e8",
              "status": "affected",
              "version": "f147dd9ecabf23fd63d2562ffe64252a0453ecde",
              "versionType": "git"
            },
            {
              "lessThan": "f97d8c7bab7843631206a114986c9059da03efeb",
              "status": "affected",
              "version": "f147dd9ecabf23fd63d2562ffe64252a0453ecde",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/rds/ib_cm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.37"
            },
            {
              "lessThan": "2.6.37",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrds: ib: use rds_conn_drop() on protocol version mismatch\n\nrds_ib_cm_connect_complete() runs from the RDMA-CM event handler with\nconn-\u003ec_cm_lock held.  When the peer negotiates a protocol version\nolder than RDS_PROTOCOL_COMPAT_VERSION, the handler calls\nrds_conn_destroy(), which is only safe in the rmmod path: it\nsynchronously tears the connection down and flush_work()es the\nshutdown work cp_down_w.\n\nThat shutdown work (rds_conn_shutdown()) needs cp_cm_lock, which is\nthe very lock the event handler still holds, so the flush never\ncompletes: the two workers wait on each other and the RDS connection\nworkqueues stall for good.\n\nAll other RDMA-CM failure paths (REJECTED, CONNECT_ERROR,\nDISCONNECTED) use rds_conn_drop(), which marks the connection\nRDS_CONN_ERROR and schedules the shutdown work asynchronously.  Use\nit here as well."
    }
  ],
  "id": "CVE-2026-98257",
  "lastModified": "2026-10-07T07:17:06.973",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-10-06T09:18:14.540",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/14fb90067d13f4494cff0f03243fae3cf2911cbc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/344c72a0bc2703a6de4918ed935850e07dae3af2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/424019be3f637da76b74f44a40034669acbb166f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/65ca0a5037152a5a80b8fe6aac80eb80458be573"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7d8c22cb2cb1efb5e830a4545c76abf7b35cc2e8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b5c9f2951d330d4a198a64d6e60f79b4bd6ef078"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d392b16acd0908f077289aad8bba066ff16de336"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f97d8c7bab7843631206a114986c9059da03efeb"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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