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CVE-2026-64504— iio: accel: bmc150: clamp the device-reported FIFO frame count

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于bmc150加速度计驱动中对设备报告的FIFO帧计数未进行有效限制，可能导致栈越界写入，攻击者可通过恶意设备或篡改I2C/SPI总线触发。

AI Predicted 7.8 Difficulty: Easy EPSS 0.17% · P5

Possible ATT&CK Techniques 1 AI

T1205.001 · Port Knocking

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 3bbec9773389112330954a6a64422eaa78d546c1< b5a9f521e0a49a0266200fd535b32a9668ecb33b affected
3bbec9773389112330954a6a64422eaa78d546c1< 2fe0531dd73eff1de0f2584cb77716d645e548d5 affected
3bbec9773389112330954a6a64422eaa78d546c1< d0e6d924a5484e005cae5aff6a0aa07a22f3c9ff affected
3bbec9773389112330954a6a64422eaa78d546c1< bfffc98f3de92e0f76be7c7b72e63ac1776a6dbc affected
3bbec9773389112330954a6a64422eaa78d546c1< 89f4a4ca0ac3a933c750569a771c079a290b0721 affected
3bbec9773389112330954a6a64422eaa78d546c1< 3e766526827acd542bcd36c20c4d5f397e0f6521 affected
3bbec9773389112330954a6a64422eaa78d546c1< 35a3cd8fd65e15029eb90f1e510045b1bb071175 affected
3bbec9773389112330954a6a64422eaa78d546c1< ce0e1cae26096fe959a0da5563a6d6d5a801d5fb affected
… +10 more rows
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I. Basic Information for CVE-2026-64504

Vulnerability Information
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Vulnerability Title
iio: accel: bmc150: clamp the device-reported FIFO frame count
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: iio: accel: bmc150: clamp the device-reported FIFO frame count __bmc150_accel_fifo_flush() copies the number of samples the device reports in its hardware FIFO into an on-stack buffer u16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3]; which is sized for at most BMC150_ACCEL_FIFO_LENGTH (32) samples. The frame count is read from the FIFO_STATUS register and only masked to its 7 valid bits: count = val & 0x7F; so it can be 0..127. The only other limit applied to it is the optional caller-supplied sample budget: if (samples && count > samples) count = samples; which does not constrain count on the flush-all path (samples == 0), and leaves it well above 32 whenever samples is larger. count samples are then transferred into buffer[]: bmc150_accel_fifo_transfer(data, (u8 *)buffer, count); bmc150_accel_fifo_transfer() reads count * 6 bytes through regmap, so a malfunctioning, malicious or counterfeit accelerometer (or an attacker tampering with the I2C/SPI bus) that reports up to 127 frames writes up to 762 bytes into the 192-byte buffer: a stack out-of-bounds write of up to 570 bytes that clobbers the stack canary, saved registers and the return address. Clamp count to BMC150_ACCEL_FIFO_LENGTH, the number of samples buffer[] is sized for, before the transfer, mirroring the watermark clamp already done in bmc150_accel_set_watermark(). A well-formed flush reports at most BMC150_ACCEL_FIFO_LENGTH frames, so legitimate devices are unaffected.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于bmc150加速度计驱动中对设备报告的FIFO帧计数未进行有效限制，可能导致栈越界写入，攻击者可通过恶意设备或篡改I2C/SPI总线触发。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 3bbec9773389112330954a6a64422eaa78d546c1 ~ b5a9f521e0a49a0266200fd535b32a9668ecb33b -
Linux Linux 4.1 -

II. Public POCs for CVE-2026-64504

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III. Intelligence Information for CVE-2026-64504

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Patches & Fixes for CVE-2026-64504 (6)

Same Patch Batch · Linux · 2026-07-25 · 274 CVEs total

CVE-2026-64391 9.8 CRITICAL ksmbd: use opener credentials for ADS I/O
CVE-2026-64268 9.8 CRITICAL RDMA/siw: bound Read Response placement to the RREAD length
CVE-2026-64384 9.8 CRITICAL smb: client: fix change notify replay double-free
CVE-2026-64383 9.8 CRITICAL smb: client: fix double-free in SMB2_flush() replay
CVE-2026-64385 9.8 CRITICAL smb: client: fix double-free in SMB2_ioctl() replay
CVE-2026-64386 9.8 CRITICAL smb: client: fix query_info() replay double-free
CVE-2026-64387 9.8 CRITICAL smb: client: fix query directory replay double-free
CVE-2026-64439 9.8 CRITICAL crypto: krb5 - filter out async aead implementations at alloc
CVE-2026-64303 9.8 CRITICAL spi: fsl-lpspi: terminate the RX channel on TX prepare failure path
CVE-2026-64355 9.8 CRITICAL bpf: Reject fragmented frames in devmap
CVE-2026-64459 9.8 CRITICAL tcp: restore RCU grace period in tcp_ao_destroy_sock
CVE-2026-64399 9.8 CRITICAL ksmbd: add permission checks for FSCTL_DUPLICATE_EXTENTS_TO_FILE
CVE-2026-64410 9.8 CRITICAL netfilter: flowtable: IPIP tunnel hardware offload is not yet support
CVE-2026-64397 9.8 CRITICAL ksmbd: serialize QUERY_DIRECTORY requests per file
CVE-2026-64523 9.8 CRITICAL net/handshake: Take a long-lived file reference at submit
CVE-2026-64320 9.1 CRITICAL nvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page
CVE-2026-64392 9.1 CRITICAL ksmbd: use opener credentials for delete-on-close
CVE-2026-64269 9.1 CRITICAL RDMA/rtrs-srv: Bound RDMA-Write length to chunk size in rdma_write_sg
CVE-2026-64393 9.1 CRITICAL ksmbd: run set info with opener credentials
CVE-2026-64319 9.1 CRITICAL nvmet-auth: validate reply message payload bounds against transfer length

Showing top 20 of 274 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64504

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