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CVE-2026-53254— Bluetooth: RFCOMM: validate skb length in MCC handlers

AI Predicted 7.5 Difficulty: Moderate EPSS 0.18% · P8
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I. Basic Information for CVE-2026-53254

Vulnerability Information
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Vulnerability Title
Bluetooth: RFCOMM: validate skb length in MCC handlers
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 7c15c7c2878957cbfed93bcc29c13fdace464254 -
LinuxLinux 2.6.12 -

II. Public POCs for CVE-2026-53254

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III. Intelligence Information for CVE-2026-53254

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Patches & Fixes for CVE-2026-53254 (6)

Other References for CVE-2026-53254 (1)

Same Patch Batch · Linux · 2026-06-25 · 147 CVEs total

CVE-2026-53185zram: fix use-after-free in zram_bvec_write_partial()
CVE-2026-53167fuse: limit FUSE_NOTIFY_RETRIEVE to uptodate folios
CVE-2026-53168fuse: reject fuse_notify() pagecache ops on directories
CVE-2026-53169accel/ethosu: reject NPU_OP_RESIZE commands from userspace
CVE-2026-53171accel/ethosu: fix arithmetic issues in dma_length()
CVE-2026-53170accel/ethosu: reject DMA commands with uninitialized length
CVE-2026-53172accel/ethosu: fix IFM region index out-of-bounds in command stream parser
CVE-2026-53174ovl: keep err zero after successful ovl_cache_get()
CVE-2026-53173accel/ethosu: fix OOB write in ethosu_gem_cmdstream_copy_and_validate()
CVE-2026-53175inet: frags: fix use-after-free caused by the fqdir_pre_exit() flush
CVE-2026-53177bnxt_en: Fix NULL pointer dereference
CVE-2026-53176IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN
CVE-2026-53178staging: rtl8723bs: rtw_mlme: add bounds checks before ie_length subtraction
CVE-2026-53180timers/migration: Fix livelock in tmigr_handle_remote_up()
CVE-2026-53179staging: rtl8723bs: fix buffer over-read in rtw_update_protection
CVE-2026-53181vsock/vmci: fix sk_ack_backlog leak on failed handshake
CVE-2026-53182wifi: nl80211: reject oversized EMA RNR lists
CVE-2026-53183mptcp: allow subflow rcv wnd to shrink
CVE-2026-53184udp: clear skb->dev before running a sockmap verdict
CVE-2026-53196USB: serial: io_ti: fix heap overflow in get_manuf_info()

Showing top 20 of 147 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-53254

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