{"id":"CVE-2026-72113","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: add missing device refcount for CAN filter removal\n\nsashiko-bot remarked a problem with a concurrent device unregistration\nin isotp.c which also is present in…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: add missing device refcount for CAN filter removal\n\nsashiko-bot remarked a problem with a concurrent device unregistration\nin isotp.c which also is present in…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-416"],"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 7","enterprise_linux 8","enterprise_linux 9"],"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:17:08.707","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72113","references":[{"url":"https://git.kernel.org/stable/c/04d23061bbf18d5d81022eb21e9d32e99d24468d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/633bda66fbf309f5de5e1ad6defe8e6b1d77a20f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/84aa4807816e405c1bf87114fc63e06d244281ef","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b024c21c9066f6957b7d4a8f2037e4b000c5e041","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bd5232663524e94cc5aad861dca11e3db8e2ab6f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d59948293ea34b6337ce2b5febab8510de70048c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/dcaee869913c7210cd47ed0a8f27349d7bdcdb7b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ee8b36d0faca08f35b889b6e9aa850695e5b8ba9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72113.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-72113"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2516506"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72113"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72113"},{"url":"https://kernelcve.org/list/?q=CVE-2026-72113"},{"url":"https://lore.kernel.org/linux-cve-announce/2026081527-CVE-2026-72113-b385@gregkh/T"}],"tags":["nvd","csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00169,"epssPercentile":0.06196,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:41:41.918613Z"},"scores":{"nvd":7.8,"vendor":4.7,"cna":7.8},"ingestedAt":"2026-10-16T19:46:24.432Z","slug":"CVE-2026-72113","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: add missing device refcount for CAN filter removal\n\nsashiko-bot remarked a problem with a concurrent device unregistration\nin isotp.c which also is present in the bcm.c code. A former fix for raw.c\ncommit c275a176e4b6 (\"can: raw: add missing refcount for memory leak fix\")\nintroduced a netdevice_tracker which solves the issue for bcm.c too.\n\nbcm_release(), bcm_delete_rx_op() and bcm_notifier() relied on\ndev_get_by_index(ifindex) to re-find the device for an rx_op before\nunregistering its filter. If a concurrent NETDEV_UNREGISTER has already\nunlisted the device from the ifindex table, that lookup fails and\ncan_rx_unregister() is silently skipped, leaving a stale CAN filter\npointing at the soon-to-be-freed bcm_op/socket.\n\nHold a netdev_hold()/netdev_put() tracked reference on op->rx_reg_dev\nfrom the moment the rx filter is registered in bcm_rx_setup() until it\nis unregistered in bcm_rx_unreg(), and use that reference directly in\nbcm_release() and bcm_delete_rx_op() instead of re-looking the device\nup by ifindex.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72113.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":230264,"id":"CVE-2026-72113","ts":1793130911510,"field":"cvss","old":"4.7","new":"7.8"},{"seq":230263,"id":"CVE-2026-72113","ts":1793130911510,"field":"severity","old":"medium","new":"high"},{"seq":229304,"id":"CVE-2026-72113","ts":1793019671140,"field":"cvss","old":"7.8","new":"4.7"},{"seq":229303,"id":"CVE-2026-72113","ts":1793019671140,"field":"severity","old":"high","new":"medium"}]}