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{"affected_release": [{"advisory": "RHSA-2025:7501", "cpe": "cpe:/o:redhat:enterprise_linux:10.0", "package": "kernel-0:6.12.0-55.11.1.el10_0", "product_name": "Red Hat Enterprise Linux 10", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:4341", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.40.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-04-30T00:00:00Z"}, {"advisory": "RHSA-2025:7423", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.16.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:4341", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.40.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-04-30T00:00:00Z"}, {"advisory": "RHSA-2025:4499", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kpatch-patch", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-06T00:00:00Z"}, {"advisory": "RHSA-2025:7423", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.16.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:4469", "cpe": "cpe:/a:redhat:rhel_e4s:9.0", "package": "kernel-0:5.14.0-70.131.1.el9_0", "product_name": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions", "release_date": "2025-05-05T00:00:00Z"}, {"advisory": "RHSA-2025:4471", "cpe": "cpe:/a:redhat:rhel_e4s:9.0::nfv", "package": "kernel-rt-0:5.14.0-70.131.1.rt21.203.el9_0", "product_name": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions", "release_date": "2025-05-06T00:00:00Z"}, {"advisory": "RHSA-2025:4498", "cpe": "cpe:/o:redhat:rhel_e4s:9.0", "package": "kpatch-patch", "product_name": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions", "release_date": "2025-05-06T00:00:00Z"}, {"advisory": "RHSA-2025:4339", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "kernel-0:5.14.0-284.115.1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2025-04-30T00:00:00Z"}, {"advisory": "RHSA-2025:4340", "cpe": "cpe:/a:redhat:rhel_eus:9.2::nfv", "package": "kernel-rt-0:5.14.0-284.115.1.rt14.400.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2025-04-30T00:00:00Z"}, {"advisory": "RHSA-2025:4496", "cpe": "cpe:/o:redhat:rhel_eus:9.2", "package": "kpatch-patch", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2025-05-06T00:00:00Z"}, {"advisory": "RHSA-2025:4509", "cpe": "cpe:/a:redhat:rhel_eus:9.4", "package": "kernel-0:5.14.0-427.67.1.el9_4", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-05-06T00:00:00Z"}, {"advisory": "RHSA-2025:4497", "cpe": "cpe:/o:redhat:rhel_eus:9.4", "package": "kpatch-patch", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-05-06T00:00:00Z"}], "bugzilla": {"description": "kernel: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()", "id": "2356593", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2356593"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.0", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-119", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()\nnvme_tcp_recv_pdu() doesn't check the validity of the header length.\nWhen header digests are enabled, a target might send a packet with an\ninvalid header length (e.g. 255), causing nvme_tcp_verify_hdgst()\nto access memory outside the allocated area and cause memory corruptions\nby overwriting it with the calculated digest.\nFix this by rejecting packets with an unexpected header length."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, prevent the `nvme_tcp` module from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically. Note that this will make NVMe over TCP fabrics unavailable, and as such is not a suitable mitigation for systems relying on that technology."}, "name": "CVE-2025-21927", "package_state": [{"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-04-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-21927\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-21927\nhttps://lore.kernel.org/linux-cve-announce/2025040133-CVE-2025-21927-36d6@gregkh/T"], "statement": "This flaw results from an improper bounds check, which an attacker could exploit by sending a packet with a too-large header. The driver processing that header will then both read beyond the bounds of the buffer it has allocated, and will also alter memory outside of the buffer when it writes the result of digest calculations. An attacker could thus read otherwise inaccessible kernel memory, causing a denial of service or exfiltrating sensitive data, or write out of bounds, which could lead to an escalation of privileges.\nWhile NVMe over fabric is typically used in the context of a single system, Red Hat's assessment suggests an Attack Vector of Adjacent. This is due to the possibility of NVMe being used as a storage solution for a cluster or datacenter.", "threat_severity": "Important"}