CVE-2026-97408Bluetooth: L2CAP: validate connectionless PSM length
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: validate connectionless PSM length Connectionless L2CAP frames carry a two-byte PSM at the start of the payload. l2cap_recv_frame() currently reads that PSM unconditionally after validating only the outer L2CAP length. A malformed connectionless frame with a zero- or one-byte payload can therefore make the parser read beyond the advertised skb payload and use tailroom bytes as part of the PSM. A VHCI-backed QEMU reproducer injected a one-byte connectionless payload and reached the unchecked read. Reject connectionless frames that cannot contain the PSM before reading or pulling it. This preserves all valid connectionless frames while dropping only structurally incomplete packets.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8104cd9859b6de0826cffa68adf2c1461185823b; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 9448e6f693fcf1f0ac4ee648a9b2cc83bfe4a982; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 22fc1ce4e37c81d4e7aac01566ebdc232214540d; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 72e26293a231f63a856340d3a1f0f5fc29bf87e5; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3502ede8aed3c3ee1786d952a11054ac737d1a38; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before ae69dca122f6d6046a68cf40153e6e827c77ff5c; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a40a5f922546b3bd7c094d882b29177db4f2abe0 | CNA record |
References
- https://git.kernel.org/stable/c/8104cd9859b6de0826cffa68adf2c1461185823b
- https://git.kernel.org/stable/c/9448e6f693fcf1f0ac4ee648a9b2cc83bfe4a982
- https://git.kernel.org/stable/c/22fc1ce4e37c81d4e7aac01566ebdc232214540d
- https://git.kernel.org/stable/c/72e26293a231f63a856340d3a1f0f5fc29bf87e5
- https://git.kernel.org/stable/c/3502ede8aed3c3ee1786d952a11054ac737d1a38
- https://git.kernel.org/stable/c/ae69dca122f6d6046a68cf40153e6e827c77ff5c
- https://git.kernel.org/stable/c/a40a5f922546b3bd7c094d882b29177db4f2abe0
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.