{"id":"CVE-2026-31512","summary":"Bluetooth: L2CAP: Validate PDU length before reading SDU length in l2cap_ecred_data_rcv()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Validate PDU length before reading SDU length in l2cap_ecred_data_rcv()\n\nl2cap_ecred_data_rcv() reads the SDU length field from skb-\u003edata using\nget_unaligned_le16() without first verifying that skb contains at least\nL2CAP_SDULEN_SIZE (2) bytes. When skb-\u003elen is less than 2, this reads\npast the valid data in the skb.\n\nThe ERTM reassembly path correctly calls pskb_may_pull() before reading\nthe SDU length (l2cap_reassemble_sdu, L2CAP_SAR_START case). Apply the\nsame validation to the Enhanced Credit Based Flow Control data path.","modified":"2026-07-08T08:00:04.106813336Z","published":"2026-04-22T13:54:30.171Z","related":["SUSE-SU-2026:2068-1","SUSE-SU-2026:2111-1","SUSE-SU-2026:21876-1","SUSE-SU-2026:21877-1","SUSE-SU-2026:21916-1","SUSE-SU-2026:21919-1","SUSE-SU-2026:2195-1","SUSE-SU-2026:2202-1","SUSE-SU-2026:2215-1","SUSE-SU-2026:2216-1","SUSE-SU-2026:2217-1","SUSE-SU-2026:2238-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31512.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3340be2bafdcc806f048273ea6d8e82a6597aa1b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/40c7f7eea2f4d9cb0b3e924254c8c9053372168f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/477ad4976072056c348937e94f24583321938df4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5ad981249be52f5e4e92e0e97b436b569071cb86"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8c96f3bd4ae0802db90630be8e9851827e9c9209"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c65bd945d1c08c3db756821b6bf9f1c4a77b29c6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cef09691cfb61f6c91cc27c3d69634f81c8ab949"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e47315b84d0eb188772c3ff5cf073cdbdefca6b4"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31512.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31512"},{"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":"aac23bf636593cc2d67144aed373a46a1a5f76b1"},{"fixed":"cef09691cfb61f6c91cc27c3d69634f81c8ab949"},{"fixed":"3340be2bafdcc806f048273ea6d8e82a6597aa1b"},{"fixed":"e47315b84d0eb188772c3ff5cf073cdbdefca6b4"},{"fixed":"477ad4976072056c348937e94f24583321938df4"},{"fixed":"40c7f7eea2f4d9cb0b3e924254c8c9053372168f"},{"fixed":"8c96f3bd4ae0802db90630be8e9851827e9c9209"},{"fixed":"5ad981249be52f5e4e92e0e97b436b569071cb86"},{"fixed":"c65bd945d1c08c3db756821b6bf9f1c4a77b29c6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31512.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.14.0"},{"fixed":"5.10.253"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.203"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.168"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.131"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.80"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.21"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31512.json"}}],"schema_version":"1.7.5"}