{"id":"CVE-2026-100071","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-100071","generatedAt":"2026-10-28T02:59:05.678Z","title":"In the Linux kernel, the following vulnerability has been resolved: net: hsr: free learned nodes on device setup failure hsr_dev_finalize() can fail after a lower-device RX handler has already been registered (slave A is added before the failable slave…","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hsr: free learned nodes on device setup failure\n\nhsr_dev_finalize() can fail after a lower-device RX handler has\nalready been registered (slave A is added before the failable slave B\nand interlink adds). RX handlers run in softirq regardless of the\nmaster's state, so frames received in that window can learn dynamic\nnodes into node_db, and the error unwind never releases them.\n\nFree both owned dynamic databases in the unwind, mirroring\nhsr_dellink(). proxy_node_db is provably empty on every current error\nexit (only interlink RX feeds it, and the interlink add is the last\nfailable step) and is freed for symmetry. The order is safe:\nhsr_del_port() unregisters each RX handler with synchronize_net()\nbefore hsr_del_nodes() runs, which removes remaining entries with\nlist_del_rcu() and defers their release with call_rcu() for readers\nalready under RCU.","published":"2026-09-25T14:17:14.000Z","lastModified":"2026-10-21T18:46:22.000Z","status":"Analyzed","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":[],"affected":["linux/linux kernel"],"epss":{"score":0.00114,"percentile":0.01479,"date":"2026-10-26","history":[{"date":"2026-09-26","score":0.00161,"percentile":0.0458}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.11%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-21T19:01:34.000Z","detail":{"from":null,"score":"5.5","severity":"MEDIUM","fromSeverity":null},"summary":"Now scored CVSS 5.5 MEDIUM."},{"kind":"new","label":"New CVE","at":"2026-09-25T14:17:14.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-09-25T14:17:13.567Z"},"summary":"New CVE, medium severity (CVSS 5.5)."}],"references":[{"url":"https://git.kernel.org/stable/c/0a340ffd96943a49a78e367efac9517ca767d99b","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/49b01f2939abc676a6f9a118f07a10110ee5f683","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/65702339b3e9fd792f65d4b740928798194d86ce","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7f16289b91eb316f170a6bd22d32e6c632f6a5b6","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e691eee886871b933d772ffc76d66c80b4c0a25e","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f7289e3492f2694dccd3d79287e0e31879b58650","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-100071","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}