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A remote peer alone cannot create the stale non-init namespace RDS/IB connection.\nAC:L - The attacker controls the namespace lifetime and socket operations needed to leave an RDS/IB connection with a stale net pointer, and syzbot reproduced the UAF. No hard-to-win race or victim state outside attacker control is required.\nPR:L - AF_RDS socket creation and SO_RDS_TRANSPORT do not require real init-namespace root, and the issue is reachable by an unprivileged local user via user namespaces. This is not an unauthenticated remote path, so low local privileges are required.\nUI:N - No victim action is needed after the attacker runs the local namespace and socket sequence. The later RDMA/RDS workqueue access occurs asynchronously in kernel context.\nS:U - The vulnerability corrupts/accesses kernel resources within the same kernel security authority. 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{"bugzilla": {"description": "kernel: net/rds: Restrict use of RDS/IB to the initial network namespace", "id": "2492410", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492410"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-280", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet/rds: Restrict use of RDS/IB to the initial network namespace\nPrevent using RDS/IB in network namespaces other than the initial one.\nThe existing RDS/IB code will not work properly in non-initial network\nnamespaces.", "A flaw was found in the Linux kernel's Reliable Datagram Sockets over InfiniBand (RDS/IB) component. This vulnerability allowed the use of RDS/IB in network namespaces other than the initial one, where the existing code would not function correctly. This improper operation could lead to unexpected system behavior or a denial of service."], "name": "CVE-2026-53077", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53077\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53077\nhttps://lore.kernel.org/linux-cve-announce/2026062406-CVE-2026-53077-a66c@gregkh/T"], "threat_severity": "Moderate"}

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