CVE-2026-53254
published 2026-06-25CVE-2026-53254: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: validate skb length in MCC handlers The RFCOMM MCC handlers cast…
PriorityP344high8.1CVSS 3.1
AVAACLPRNUINSUCHINAH
EPSS
0.27%
18.8th percentile
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.
Affected
26 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7c15c7c2878957cbfed93bcc29c13fdace464254 | 7c15c7c2878957cbfed93bcc29c13fdace464254 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0d637136ce89f9a2309b2c3502402ce400dab0ef | 0d637136ce89f9a2309b2c3502402ce400dab0ef |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 98377e6b1a1a56561ec66a181573ea2b61b2079e | 98377e6b1a1a56561ec66a181573ea2b61b2079e |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1b070ac9e99c2c2c3a8112943ca98ab6fca7f10c | 1b070ac9e99c2c2c3a8112943ca98ab6fca7f10c |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3eabc6d47a0ad22b053329997aaf0ec1e581e392 | 3eabc6d47a0ad22b053329997aaf0ec1e581e392 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 08b9c1fbe78f4ad3f6250c6541cfaabdbeb81997 | 08b9c1fbe78f4ad3f6250c6541cfaabdbeb81997 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 23882b828c3c8c51d0c946446a396b10abb3b16b | 23882b828c3c8c51d0c946446a396b10abb3b16b |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 2.6.12.1 < 5.15.210 | 5.15.210 |
| linux | linux_kernel | >= 5.16 < 6.1.176 | 6.1.176 |
| linux | linux_kernel | >= 6.13 < 6.18.36 | 6.18.36 |
| linux | linux_kernel | >= 6.19 < 7.0.13 | 7.0.13 |
| linux | linux_kernel | >= 6.2 < 6.6.143 | 6.6.143 |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
vendor_redhat7.0MEDIUM
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Red Hat
kernel: Bluetooth: RFCOMM: validate skb length in MCC handlers
vendor_redhat·2026-06-25·CVSS 7.0
CVE-2026-53254 [MEDIUM] CWE-1284 kernel: Bluetooth: RFCOMM: validate skb length in MCC handlers
kernel: Bluetooth: RFCOMM: validate skb length in MCC handlers
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 flaw was found in the Linux kernel's Bluetooth RFCOMM (Radio Frequency Communication) subsystem. A malicio
GHSA
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
ghsa_unreviewed·2026-06-25
CVE-2026-53254 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
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.
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/08b9c1fbe78f4ad3f6250c6541cfaabdbeb81997https://git.kernel.org/stable/c/0d637136ce89f9a2309b2c3502402ce400dab0efhttps://git.kernel.org/stable/c/1b070ac9e99c2c2c3a8112943ca98ab6fca7f10chttps://git.kernel.org/stable/c/23882b828c3c8c51d0c946446a396b10abb3b16bhttps://git.kernel.org/stable/c/3eabc6d47a0ad22b053329997aaf0ec1e581e392https://git.kernel.org/stable/c/7c15c7c2878957cbfed93bcc29c13fdace464254https://git.kernel.org/stable/c/98377e6b1a1a56561ec66a181573ea2b61b2079e
2026-06-25
Published