{"id":"CVE-2026-68479","summary":"Bluetooth: btrtl: validate firmware patch bounds","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btrtl: validate firmware patch bounds\n\nrtlbt_parse_firmware() copies patch_length - 4 bytes before appending the\nfirmware version. A malformed firmware patch shorter than the version field\ncan make this subtraction underflow and turn the copy into an oversized\nread and write during Bluetooth setup.\n\nThe existing patch_offset + patch_length check can also wrap on 32-bit\narchitectures. Validate the patch length and range without arithmetic\noverflow before allocating or copying the patch.","modified":"2026-08-18T03:56:17.380137076Z","published":"2026-08-15T05:51:34.106Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68479.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/39e01b4addfbbe177567d6ed1dfb81f9cccb19e6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/609c5b04a28dc1b0f3af6a7bc93055135b2d2059"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6744ab60dfac55d1df5733960aad5be300984301"},{"type":"WEB","url":"https://git.kernel.org/stable/c/68c5a2a19987c035eb129e627e579adafb04f637"},{"type":"WEB","url":"https://git.kernel.org/stable/c/83534891c058ed71e251135072640911670869aa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a4cb830e0b55ac76c849fd7840afb251f4c028fa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bda3c598ade6ea03884074b91e31608326684921"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f1ca750c0510bdbb504bf084d2f196ef2af92ea6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68479.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68479"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"db33c77dddc2ed2cff3061d0b096a9f5ab0c3647"},{"fixed":"39e01b4addfbbe177567d6ed1dfb81f9cccb19e6"},{"fixed":"bda3c598ade6ea03884074b91e31608326684921"},{"fixed":"a4cb830e0b55ac76c849fd7840afb251f4c028fa"},{"fixed":"68c5a2a19987c035eb129e627e579adafb04f637"},{"fixed":"83534891c058ed71e251135072640911670869aa"},{"fixed":"6744ab60dfac55d1df5733960aad5be300984301"},{"fixed":"f1ca750c0510bdbb504bf084d2f196ef2af92ea6"},{"fixed":"609c5b04a28dc1b0f3af6a7bc93055135b2d2059"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68479.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.2.0"},{"fixed":"5.10.261"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68479.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}