CVE-2026-53254 Details
Description
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.
A vulnerability in the Linux kernel's Bluetooth RFCOMM implementation allows for out-of-bounds reads in the MCC handlers. This issue arises because the handlers cast the skb->data to protocol-specific structures without first validating the length of the skb. A malicious remote device can exploit this by sending truncated MCC frames, leading to unauthorized memory access. The vulnerability affects the Linux kernel's stable group.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for downloading the patched version are available on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/08b9c1fbe78f4ad3f6250c6541cfaabdbeb81997 | kernel.org | Patch |
| https://git.kernel.org/stable/c/0d637136ce89f9a2309b2c3502402ce400dab0ef | kernel.org | Patch |
| https://git.kernel.org/stable/c/1b070ac9e99c2c2c3a8112943ca98ab6fca7f10c | kernel.org | Patch |
| https://git.kernel.org/stable/c/23882b828c3c8c51d0c946446a396b10abb3b16b | kernel.org | Patch |
| https://git.kernel.org/stable/c/3eabc6d47a0ad22b053329997aaf0ec1e581e392 | kernel.org | Patch |
| https://git.kernel.org/stable/c/7c15c7c2878957cbfed93bcc29c13fdace464254 | kernel.org | Patch |
| https://git.kernel.org/stable/c/98377e6b1a1a56561ec66a181573ea2b61b2079e | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 2.6.12.1, < 5.15.210 >= 5.16, < 6.1.176 >= 6.2, < 6.6.143 >= 6.7, < 6.12.94 >= 6.13, < 6.18.36 >= 6.19, < 7.0.13 2.6.12 - 2.6.12 rc2 2.6.12 rc3 2.6.12 rc4 2.6.12 rc5 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 7.1 rc5 7.1 rc6 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 8, 2026 | Initial Analysis | [email protected] |
| Jun 28, 2026 | CVE Modified | kernel.org |
| Jun 25, 2026 | New CVE Received | kernel.org |