{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"lessThan":"b48fc702b20233b809f01053232c3cd5083c97b4","status":"affected","version":"0c2204a4ad710d95d348ea006f14ba926e842ffd","versionType":"git"},{"lessThan":"991c431077b19176d3fe3bb54054c063776a8cdc","status":"affected","version":"0c2204a4ad710d95d348ea006f14ba926e842ffd","versionType":"git"},{"lessThan":"94914731ca0b99899dceadd80d2df00584a688ca","status":"affected","version":"0c2204a4ad710d95d348ea006f14ba926e842ffd","versionType":"git"},{"lessThan":"e6f6cd501fb54060940a6eb3f4103eeb5e426ae7","status":"affected","version":"0c2204a4ad710d95d348ea006f14ba926e842ffd","versionType":"git"},{"lessThan":"3efaad55cad1ded429e3a873bfece389058a526b","status":"affected","version":"0c2204a4ad710d95d348ea006f14ba926e842ffd","versionType":"git"},{"lessThan":"35fb4a0c077c5d1049c2628b769e0a1b1e65df0d","status":"affected","version":"0c2204a4ad710d95d348ea006f14ba926e842ffd","versionType":"git"},{"lessThan":"868202aa2adae427060a42d5bd663b4d782ec02c","status":"affected","version":"0c2204a4ad710d95d348ea006f14ba926e842ffd","versionType":"git"},{"lessThan":"d5ee2ff98322337951c56398e79d51815acbf955","status":"affected","version":"0c2204a4ad710d95d348ea006f14ba926e842ffd","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"status":"affected","version":"5.7"},{"lessThan":"5.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.265","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.216","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.140","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.86","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.27","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeConfigurations":[{"negate":false,"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.140","versionStartIncluding":"5.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.86","versionStartIncluding":"6.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.27","versionStartIncluding":"6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.4","versionStartIncluding":"6.19","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"OR"}],"cveId":"CVE-2026-43491","cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: ns: Limit the maximum server registration per node\n\nCurrent code does no bound checking on the number of servers added per\nnode. A malicious client can flood NEW_SERVER messages and exhaust memory.\n\nFix this issue by limiting the maximum number of server registrations to\n256 per node. If the NEW_SERVER message is received for an old port, then\ndon't restrict it as it will get replaced. While at it, also rate limit\nthe error messages in the failure path of qrtr_ns_worker().\n\nNote that the limit of 256 is chosen based on the current platform\nrequirements. If requirement changes in the future, this limit can be\nincreased.","epss":{"date":"2026-11-06","percentile":0.04127,"score":0.00149},"exploits":[],"kev":null,"metrics":[{"score":5.5,"severity":"medium","source":"NVD: nvd@nist.gov","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1793981924487,"publishedAt":1779187463832,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/b48fc702b20233b809f01053232c3cd5083c97b4"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/991c431077b19176d3fe3bb54054c063776a8cdc"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/94914731ca0b99899dceadd80d2df00584a688ca"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/e6f6cd501fb54060940a6eb3f4103eeb5e426ae7"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/3efaad55cad1ded429e3a873bfece389058a526b"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/35fb4a0c077c5d1049c2628b769e0a1b1e65df0d"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/868202aa2adae427060a42d5bd663b4d782ec02c"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/d5ee2ff98322337951c56398e79d51815acbf955"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/35fb4a0c077c5d1049c2628b769e0a1b1e65df0d"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/3efaad55cad1ded429e3a873bfece389058a526b"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/868202aa2adae427060a42d5bd663b4d782ec02c"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/94914731ca0b99899dceadd80d2df00584a688ca"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/991c431077b19176d3fe3bb54054c063776a8cdc"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/b48fc702b20233b809f01053232c3cd5083c97b4"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/d5ee2ff98322337951c56398e79d51815acbf955"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/e6f6cd501fb54060940a6eb3f4103eeb5e426ae7"}],"remediation":[{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/35fb4a0c077c5d1049c2628b769e0a1b1e65df0d"},{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/3efaad55cad1ded429e3a873bfece389058a526b"},{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/868202aa2adae427060a42d5bd663b4d782ec02c"},{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/d5ee2ff98322337951c56398e79d51815acbf955"},{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/e6f6cd501fb54060940a6eb3f4103eeb5e426ae7"}],"revision":"9fd3fac09780405493035a9f807366a883dbd1f0c6d23133a1d1cf62df99ed40","sources":[{"modifiedAt":1793979777704,"name":"CNA: Linux","retrievedAt":1793981732497,"url":"https://www.cve.org/CVERecord?id=CVE-2026-43491"},{"modifiedAt":1793981924487,"name":"NVD","retrievedAt":1793989202368,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43491"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793981760073,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-43491"}],"ssvc":{"assessedAt":1793979673574,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"net: qrtr: ns: Limit the maximum server registration per node","updatedAt":1793989202368}