{"api_version":"1","generated_at":"2026-07-23T13:09:57+00:00","cve":"CVE-2025-21762","urls":{"html":"https://cve.report/CVE-2025-21762","api":"https://cve.report/api/cve/CVE-2025-21762.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-21762","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-21762"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2025-02-27 03:15:16","updated_at":"2026-05-12 13:16:35"},"problem_types":["CWE-416","CWE-416 CWE-416 Use After Free"],"metrics":[{"version":"3.1","source":"ADP","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}},{"version":"3.1","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}}],"references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html","name":"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-503939.html","name":"https://cert-portal.siemens.com/productcert/html/ssa-503939.html","refsource":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e9f4dee534eb1b225b0a120395ad9bc2afe164d3","name":"https://git.kernel.org/stable/c/e9f4dee534eb1b225b0a120395ad9bc2afe164d3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d9366ac2f956a1948b68c0500f84a3462ff2ed8a","name":"https://git.kernel.org/stable/c/d9366ac2f956a1948b68c0500f84a3462ff2ed8a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/307cd1e2d3cb1cbc6c40c679cada6d7168b18431","name":"https://git.kernel.org/stable/c/307cd1e2d3cb1cbc6c40c679cada6d7168b18431","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a42b69f692165ec39db42d595f4f65a4c8f42e44","name":"https://git.kernel.org/stable/c/a42b69f692165ec39db42d595f4f65a4c8f42e44","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","name":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","refsource":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe","name":"https://git.kernel.org/stable/c/01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/10f555e3f573d004ae9d89b3276abb58c4ede5c3","name":"https://git.kernel.org/stable/c/10f555e3f573d004ae9d89b3276abb58c4ede5c3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2c331718d3389b6c5f6855078ab7171849e016bd","name":"https://git.kernel.org/stable/c/2c331718d3389b6c5f6855078ab7171849e016bd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html","name":"https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f189654459423d4d48bef2d120b4bfba559e6039","name":"https://git.kernel.org/stable/c/f189654459423d4d48bef2d120b4bfba559e6039","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-21762","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21762","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 29a26a56803855a79dbd028cd61abee56237d6e5 10f555e3f573d004ae9d89b3276abb58c4ede5c3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 29a26a56803855a79dbd028cd61abee56237d6e5 307cd1e2d3cb1cbc6c40c679cada6d7168b18431 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 29a26a56803855a79dbd028cd61abee56237d6e5 d9366ac2f956a1948b68c0500f84a3462ff2ed8a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 29a26a56803855a79dbd028cd61abee56237d6e5 f189654459423d4d48bef2d120b4bfba559e6039 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 29a26a56803855a79dbd028cd61abee56237d6e5 e9f4dee534eb1b225b0a120395ad9bc2afe164d3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 29a26a56803855a79dbd028cd61abee56237d6e5 01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 29a26a56803855a79dbd028cd61abee56237d6e5 2c331718d3389b6c5f6855078ab7171849e016bd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 29a26a56803855a79dbd028cd61abee56237d6e5 a42b69f692165ec39db42d595f4f65a4c8f42e44 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.4","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.4 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.4.291 5.4.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.235 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.179 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.129 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.79 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.16 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.13.4 6.13.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.14 * original_commit_for_fix","platforms":[]},{"source":"ADP","vendor":"Siemens","product":"SIMATIC S7-1500 TM MFP - BIOS","version":"affected * custom","platforms":[]},{"source":"ADP","vendor":"Siemens","product":"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem","version":"affected * custom","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2025","cve_id":"21762","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}},{"other":{"content":{"id":"CVE-2025-21762","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","timestamp":"2025-02-27T17:57:30.024595Z","version":"2.0.3"},"type":"ssvc"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","description":"CWE-416 Use After Free","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2025-02-27T18:02:27.083Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"},{"providerMetadata":{"dateUpdated":"2025-11-03T19:37:11.540Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"}],"title":"CVE Program Container"},{"affected":[{"defaultStatus":"unknown","product":"SIMATIC S7-1500 TM MFP - BIOS","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"0","versionType":"custom"}]}],"providerMetadata":{"dateUpdated":"2026-05-12T12:03:43.118Z","orgId":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","shortName":"siemens-SADP"},"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-503939.html"}],"x_adpType":"supplier"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv4/arp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"10f555e3f573d004ae9d89b3276abb58c4ede5c3","status":"affected","version":"29a26a56803855a79dbd028cd61abee56237d6e5","versionType":"git"},{"lessThan":"307cd1e2d3cb1cbc6c40c679cada6d7168b18431","status":"affected","version":"29a26a56803855a79dbd028cd61abee56237d6e5","versionType":"git"},{"lessThan":"d9366ac2f956a1948b68c0500f84a3462ff2ed8a","status":"affected","version":"29a26a56803855a79dbd028cd61abee56237d6e5","versionType":"git"},{"lessThan":"f189654459423d4d48bef2d120b4bfba559e6039","status":"affected","version":"29a26a56803855a79dbd028cd61abee56237d6e5","versionType":"git"},{"lessThan":"e9f4dee534eb1b225b0a120395ad9bc2afe164d3","status":"affected","version":"29a26a56803855a79dbd028cd61abee56237d6e5","versionType":"git"},{"lessThan":"01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe","status":"affected","version":"29a26a56803855a79dbd028cd61abee56237d6e5","versionType":"git"},{"lessThan":"2c331718d3389b6c5f6855078ab7171849e016bd","status":"affected","version":"29a26a56803855a79dbd028cd61abee56237d6e5","versionType":"git"},{"lessThan":"a42b69f692165ec39db42d595f4f65a4c8f42e44","status":"affected","version":"29a26a56803855a79dbd028cd61abee56237d6e5","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv4/arp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.4"},{"lessThan":"4.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.4.*","status":"unaffected","version":"5.4.291","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.235","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.179","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.129","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.79","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.16","versionType":"semver"},{"lessThanOrEqual":"6.13.*","status":"unaffected","version":"6.13.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.14","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.4.291","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.235","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.179","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.129","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.79","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.16","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.13.4","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.14","versionStartIncluding":"4.4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-05-11T21:05:54.311Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/10f555e3f573d004ae9d89b3276abb58c4ede5c3"},{"url":"https://git.kernel.org/stable/c/307cd1e2d3cb1cbc6c40c679cada6d7168b18431"},{"url":"https://git.kernel.org/stable/c/d9366ac2f956a1948b68c0500f84a3462ff2ed8a"},{"url":"https://git.kernel.org/stable/c/f189654459423d4d48bef2d120b4bfba559e6039"},{"url":"https://git.kernel.org/stable/c/e9f4dee534eb1b225b0a120395ad9bc2afe164d3"},{"url":"https://git.kernel.org/stable/c/01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe"},{"url":"https://git.kernel.org/stable/c/2c331718d3389b6c5f6855078ab7171849e016bd"},{"url":"https://git.kernel.org/stable/c/a42b69f692165ec39db42d595f4f65a4c8f42e44"}],"title":"arp: use RCU protection in arp_xmit()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2025-21762","datePublished":"2025-02-27T02:18:14.600Z","dateReserved":"2024-12-29T08:45:45.761Z","dateUpdated":"2026-05-12T12:03:43.118Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-02-27 03:15:16","lastModifiedDate":"2026-05-12 13:16:35","problem_types":["CWE-416","CWE-416 CWE-416 Use After Free"],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"5.4.291","matchCriteriaId":"C925DCB3-DA3B-425E-AC02-ECEE58516E6D"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.235","matchCriteriaId":"545121FA-DE31-4154-9446-C2000FB4104D"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.179","matchCriteriaId":"C708062C-4E1B-465F-AE6D-C09C46400875"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1.129","matchCriteriaId":"2DA5009C-C9B9-4A1D-9B96-78427E8F232C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.79","matchCriteriaId":"B16AADE5-B2FD-4C14-B4E4-85E8EDAFE775"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.16","matchCriteriaId":"13C8DB18-FC60-425F-84E5-3EDDEC61B2FC"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.13.4","matchCriteriaId":"2A2093ED-74A9-43F9-AC72-50030F374EA4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*","matchCriteriaId":"186716B6-2B66-4BD0-852E-D48E71C0C85F"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*","matchCriteriaId":"0D3E781C-403A-498F-9DA9-ECEE50F41E75"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2025","CveId":"21762","Ordinal":"1","Title":"arp: use RCU protection in arp_xmit()","CVE":"CVE-2025-21762","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"21762","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"arp: use RCU protection in arp_xmit()"}]}}}