--- cve: "CVE-2026-53255" severity: "LOW" cvss: 3.1 epss: "12%" vendor: "Linux" kev: false exploited: false published: "2026-06-25 09:16:43" tags: [cve, security, low] source: tsecurity.de CVE-Dossier exported: "2026-09-08T05:09:35+02:00" --- # CVE-2026-53255 > 3.1 LOW ## Beschreibung In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate advertising TLV before type checks tlv_data_is_valid() reads each advertising data field length from data[i], then inspects data[i + 1] for managed EIR types before checking that the current field still fits inside the supplied buffer. A malformed field whose length byte is the last byte of the buffer can therefore make the parser read one byte past the advertising data. KASAN reported the following when a malformed MGMT_OP_ADD_ADVERTISING request reached that path: BUG: KASAN: vmalloc-out-of-bounds in tlv_data_is_valid() Read of size 1 Call trace: tlv_data_is_valid() add_advertising() hci_mgmt_cmd() hci_sock_sendmsg() Move the existing element-length check before any type-octet inspection so each non-empty element is proven to contain its type byte before the parser looks at data[i + 1]. ## Patch verfügbar (OSV) - Kernel ≥ 5.10.259 - Kernel ≥ 5.15.210 - Kernel ≥ 6.1.176 - Kernel ≥ 6.6.143 - Kernel ≥ 6.12.94 - Kernel ≥ 6.18.36 - Kernel ≥ 7.0.13 ## Referenzen - - - - - - - - --- _Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-53255) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_