{"id":"CVE-2025-21762","revision":null,"records":[{"revision":"940981fda62049869814b7c372b7ec5c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-21762","aliases":[],"title":"arp: use RCU protection in arp_xmit()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\narp: use RCU protection in arp_xmit()\n\narp_xmit() can be called without RTNL or RCU protection.\n\nUse RCU protection to avoid potential UAF.","state":0,"publishedAt":"2025-02-27T02:18:14.6+00:00","modifiedAt":"2026-10-15T01:04:08.393+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/ipv4/arp.c\"\n ],\n \"versions\": [\n {\n \"version\": \"29a26a56803855a79dbd028cd61abee56237d6e5\",\n \"lessThan\": \"10f555e3f573d004ae9d89b3276abb58c4ede5c3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"29a26a56803855a79dbd028cd61abee56237d6e5\",\n \"lessThan\": \"307cd1e2d3cb1cbc6c40c679cada6d7168b18431\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"29a26a56803855a79dbd028cd61abee56237d6e5\",\n \"lessThan\": \"d9366ac2f956a1948b68c0500f84a3462ff2ed8a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"29a26a56803855a79dbd028cd61abee56237d6e5\",\n \"lessThan\": \"f189654459423d4d48bef2d120b4bfba559e6039\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"29a26a56803855a79dbd028cd61abee56237d6e5\",\n \"lessThan\": \"e9f4dee534eb1b225b0a120395ad9bc2afe164d3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"29a26a56803855a79dbd028cd61abee56237d6e5\",\n \"lessThan\": \"01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"29a26a56803855a79dbd028cd61abee56237d6e5\",\n \"lessThan\": \"2c331718d3389b6c5f6855078ab7171849e016bd\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"29a26a56803855a79dbd028cd61abee56237d6e5\",\n \"lessThan\": \"a42b69f692165ec39db42d595f4f65a4c8f42e44\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/ipv4/arp.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4.4\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"4.4\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.291\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.235\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.179\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.129\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.79\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.16\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.13.4\",\n \"lessThanOrEqual\": \"6.13.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.14\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/10f555e3f573d004ae9d89b3276abb58c4ede5c3","https://git.kernel.org/stable/c/307cd1e2d3cb1cbc6c40c679cada6d7168b18431","https://git.kernel.org/stable/c/d9366ac2f956a1948b68c0500f84a3462ff2ed8a","https://git.kernel.org/stable/c/f189654459423d4d48bef2d120b4bfba559e6039","https://git.kernel.org/stable/c/e9f4dee534eb1b225b0a120395ad9bc2afe164d3","https://git.kernel.org/stable/c/01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe","https://git.kernel.org/stable/c/2c331718d3389b6c5f6855078ab7171849e016bd","https://git.kernel.org/stable/c/a42b69f692165ec39db42d595f4f65a4c8f42e44"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-21762","license":"CVE Program Terms of 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