CVE-2026-31512
Bluetooth: L2CAP: Validate PDU length before reading SDU length in l2cap_ecred_data_rcv()
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
3.14
References 8
git.kernel.org
- stable/c/cef09691cfb61f6c91cc27c3d69634f81c8ab949
- stable/c/3340be2bafdcc806f048273ea6d8e82a6597aa1b
- stable/c/e47315b84d0eb188772c3ff5cf073cdbdefca6b4
- stable/c/477ad4976072056c348937e94f24583321938df4
- stable/c/40c7f7eea2f4d9cb0b3e924254c8c9053372168f
- stable/c/8c96f3bd4ae0802db90630be8e9851827e9c9209
- stable/c/5ad981249be52f5e4e92e0e97b436b569071cb86
- stable/c/c65bd945d1c08c3db756821b6bf9f1c4a77b29c6