In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: validate skb length in MCC handlers The RFCOMM MCC handlers cast skb->data to protocol-specific structs without validating skb->len first. A malicious remote device can send truncated MCC frames and trigger out-of-bounds reads in these handlers. Fix this by using skb_pull_data() to validate and access the required data before dereferencing it. rfcomm_recv_rpn() requires special handling since ETSI TS 07.10 allows 1-byte RPN requests. Handle this by validating only the DLCI byte first, and validating the full struct only when len > 1.
Fix
Patch, vendor advisory and mitigation references on NVD 7
- https://git.kernel.org/stable/c/08b9c1fbe78f4ad3f6250c6541cfaabdbeb81997 Patch
- https://git.kernel.org/stable/c/0d637136ce89f9a2309b2c3502402ce400dab0ef Patch
- https://git.kernel.org/stable/c/1b070ac9e99c2c2c3a8112943ca98ab6fca7f10c Patch
- https://git.kernel.org/stable/c/23882b828c3c8c51d0c946446a396b10abb3b16b Patch
- https://git.kernel.org/stable/c/3eabc6d47a0ad22b053329997aaf0ec1e581e392 Patch
- https://git.kernel.org/stable/c/7c15c7c2878957cbfed93bcc29c13fdace464254 Patch
- https://git.kernel.org/stable/c/98377e6b1a1a56561ec66a181573ea2b61b2079e Patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.1 · linuxNVD modified 2026-10-15 02:20
Affected (CPE criteria) 12
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*
References 8
- https://git.kernel.org/stable/c/08b9c1fbe78f4ad3f6250c6541cfaabdbeb81997 Patch
- https://git.kernel.org/stable/c/0d637136ce89f9a2309b2c3502402ce400dab0ef Patch
- https://git.kernel.org/stable/c/1b070ac9e99c2c2c3a8112943ca98ab6fca7f10c Patch
- https://git.kernel.org/stable/c/23882b828c3c8c51d0c946446a396b10abb3b16b Patch
- https://git.kernel.org/stable/c/3eabc6d47a0ad22b053329997aaf0ec1e581e392 Patch
- https://git.kernel.org/stable/c/7c15c7c2878957cbfed93bcc29c13fdace464254 Patch
- https://git.kernel.org/stable/c/98377e6b1a1a56561ec66a181573ea2b61b2079e Patch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html