CVE-2026-31512
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2026-04-22
Modified: 2026-11-11
First seen: 2026-11-05
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
Description
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.
Affected Software (18)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | aac23bf636593cc2d67144aed373a46a1a5f76b1 < cef09691cfb61f6c91cc27c3d69634f81c8ab949 |
| Linux | Linux | aac23bf636593cc2d67144aed373a46a1a5f76b1 < 3340be2bafdcc806f048273ea6d8e82a6597aa1b |
| Linux | Linux | aac23bf636593cc2d67144aed373a46a1a5f76b1 < e47315b84d0eb188772c3ff5cf073cdbdefca6b4 |
| Linux | Linux | aac23bf636593cc2d67144aed373a46a1a5f76b1 < 477ad4976072056c348937e94f24583321938df4 |
| Linux | Linux | aac23bf636593cc2d67144aed373a46a1a5f76b1 < 40c7f7eea2f4d9cb0b3e924254c8c9053372168f |
| Linux | Linux | aac23bf636593cc2d67144aed373a46a1a5f76b1 < 8c96f3bd4ae0802db90630be8e9851827e9c9209 |
| Linux | Linux | aac23bf636593cc2d67144aed373a46a1a5f76b1 < 5ad981249be52f5e4e92e0e97b436b569071cb86 |
| Linux | Linux | aac23bf636593cc2d67144aed373a46a1a5f76b1 < c65bd945d1c08c3db756821b6bf9f1c4a77b29c6 |
| Linux | Linux | 3.14 |
| linux | linux_kernel | 3.14.1 – 5.10.253 |
| linux | linux_kernel | 3.14 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |