Answer in brief
CVE-2026-31512 records a Unknown severity vulnerability in Bluetooth: L2CAP: Validate PDU length before reading SDU length in l2cap_ecred_data_rcv(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=aac23bf636593cc2d67144aed373a46a1a5f76b1 <cef09691cfb61f6c91cc27c3d69634f81c8ab949 || >=aac23bf636593cc2d67144aed373a46a1a5f76b1 <3340be2bafdcc806f048273ea6d8e82a6597aa1b || >=aac23bf636593cc2d67144aed373a46a1a5f76b1 <e47315b84d0eb188772c3ff5cf073cdbdefca6b4 || >=aac23bf636593cc2d67144aed373a46a1a5f76b1 <477ad4976072056c348937e94f24583321938df4 || >=aac23bf636593cc2d67144aed373a46a1a5f76b1 <40c7f7eea2f4d9cb0b3e924254c8c9053372168f || >=aac23bf636593cc2d67144aed373a46a1a5f76b1 <8c96f3bd4ae0802db90630be8e9851827e9c9209 || >=aac23bf636593cc2d67144aed373a46a1a5f76b1 <5ad981249be52f5e4e92e0e97b436b569071cb86 || >=aac23bf636593cc2d67144aed373a46a1a5f76b1 <c65bd945d1c08c3db756821b6bf9f1c4a77b29c6 | cef09691cfb61f6c91cc27c3d69634f81c8ab949, 3340be2bafdcc806f048273ea6d8e82a6597aa1b, e47315b84d0eb188772c3ff5cf073cdbdefca6b4, 477ad4976072056c348937e94f24583321938df4, 40c7f7eea2f4d9cb0b3e924254c8c9053372168f, 8c96f3bd4ae0802db90630be8e9851827e9c9209, 5ad981249be52f5e4e92e0e97b436b569071cb86, c65bd945d1c08c3db756821b6bf9f1c4a77b29c6 |
| Linux/Linuxgeneric | 3.14 | Not reported |
Published upstream
Apr 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 5, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Validate PDU length before reading SDU length in l2cap_ecred_data_rcv() l2cap_ecred_data_rcv() reads the SDU length field from skb->data using get_unaligned_le16() without first verifying that skb contains at least L2CAP_SDULEN_SIZE (2) bytes. When skb->len is less than 2, this reads past the valid data in the skb. The ERTM reassembly path correctly calls pskb_may_pull() before reading the SDU length (l2cap_reassemble_sdu, L2CAP_SAR_START case). Apply the same validation to the Enhanced Credit Based Flow Control data path.
Quoted source text, attributed separately from HOL analysis.