{"id":"CVE-2026-63997","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nethtool: module: avoid leaking a netdev ref on module flash errors\n\nmodule_flash_fw_schedule() is missing undo for setting\nthe \"in_progress\" flag and taking the netdev …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nethtool: module: avoid leaking a netdev ref on module flash errors\n\nmodule_flash_fw_schedule() is missing undo for setting\nthe \"in_progress\" flag and taking the netdev …","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-401"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 6.11, < 6.12.93","linux_kernel >= 6.13, < 6.18.35","linux_kernel >= 6.19, < 7.0.12","linux_kernel = 7.1"],"patched":["linux_kernel 7.0.12"],"published":"2026-07-19","updated":"2026-10-13","sourceUpdated":"2026-10-13T14:39:53.820","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-63997","references":[{"url":"https://git.kernel.org/stable/c/61848c83b9132ab839809fe415ba7802a0aca4f6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/956b134d917fd7e014dc7e39a9b7610c04fcc9ba","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f7b4513e77f9571dc1041a798b93b5c4a4bfc191","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fb7f511d62692661846c47f199e0afe25c2982db","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00168,"epssPercentile":0.05624,"ingestedAt":"2026-10-13T15:33:40.019Z","slug":"CVE-2026-63997","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nethtool: module: avoid leaking a netdev ref on module flash errors\n\nmodule_flash_fw_schedule() is missing undo for setting\nthe \"in_progress\" flag and taking the netdev reference.\nDelay taking these, the device can't disappear while\nwe are holding rtnl_lock.\n\n## Affected\n\n- `linux_kernel >= 6.11, < 6.12.93`\n- `linux_kernel >= 6.13, < 6.18.35`\n- `linux_kernel >= 6.19, < 7.0.12`\n- `linux_kernel = 7.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.12`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}