{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "034e285f8b99062a0cf29112e1232154a6a44aa5"
            },
            {
              "fixed": "539cabb7b2d8ba70f55bba91db55faef11c2a6d7"
            },
            {
              "fixed": "d415fce3fcde6d7aeea6c25362a395b905811452"
            },
            {
              "fixed": "105bf79a23b85cf3a761d18a4f3e10ce88526bc1"
            },
            {
              "fixed": "7ec1ed4747f5f99f8b797bb438c5efd36079fad5"
            },
            {
              "fixed": "1114c87aa6f195cf07da55a27b2122ae26557b26"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.140"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.88"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.30"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46114.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Reject non-8-byte ATOMIC_WRITE payloads\n\natomic_write_reply() at drivers/infiniband/sw/rxe/rxe_resp.c\nunconditionally dereferences 8 bytes at payload_addr(pkt):\n\n    value = *(u64 *)payload_addr(pkt);\n\ncheck_rkey() previously accepted an ATOMIC_WRITE request with pktlen ==\nresid == 0 because the length validation only compared pktlen against\nresid. A remote initiator that sets the RETH length to 0 therefore reaches\natomic_write_reply() with a zero-byte logical payload, and the responder\nreads sizeof(u64) bytes from past the logical end of the packet into\nskb-\u003ehead tailroom, then writes those 8 bytes into the attacker's MR via\nrxe_mr_do_atomic_write(). That is a remote disclosure of 4 bytes of kernel\ntailroom per probe (the other 4 bytes are the packet's own trailing ICRC).\n\nIBA oA19-28 defines ATOMIC_WRITE as exactly 8 bytes. Anything else is\nprotocol-invalid. Hoist a strict length check into check_rkey() so the\nresponder never reaches the unchecked dereference, and keep the existing\nWRITE-family length logic for the normal RDMA WRITE path.\n\nReproduced on mainline with an unmodified rxe driver: a sustained\nzero-length ATOMIC_WRITE probe repeatedly leaks adjacent skb head-buffer\nbytes into the attacker's MR, including recognisable kernel strings and\npartial kernel-direct-map pointer words.  With this patch applied the\nresponder rejects the PDU and the MR stays all-zero.",
  "id": "CVE-2026-46114",
  "modified": "2026-07-15T01:49:15.466588884Z",
  "published": "2026-05-28T09:35:24.638Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/105bf79a23b85cf3a761d18a4f3e10ce88526bc1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1114c87aa6f195cf07da55a27b2122ae26557b26"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/539cabb7b2d8ba70f55bba91db55faef11c2a6d7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ec1ed4747f5f99f8b797bb438c5efd36079fad5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d415fce3fcde6d7aeea6c25362a395b905811452"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46114.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46114"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "RDMA/rxe: Reject non-8-byte ATOMIC_WRITE payloads"
}