CVE-2026-64504iio: accel: bmc150: clamp the device-reported FIFO frame count
- 5.5MediumCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 95% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 3 months later
· 3 months later
Record updated
- 6 days later
· 6 days later
First scored
Medium 5.5
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 3bbec9773389112330954a6a64422eaa78d546c1 – < b5a9f521e0a49a0266200fd535b32a9668ecb33b
- affected 3bbec9773389112330954a6a64422eaa78d546c1 – < 2fe0531dd73eff1de0f2584cb77716d645e548d5
- affected 3bbec9773389112330954a6a64422eaa78d546c1 – < d0e6d924a5484e005cae5aff6a0aa07a22f3c9ff
- affected 3bbec9773389112330954a6a64422eaa78d546c1 – < bfffc98f3de92e0f76be7c7b72e63ac1776a6dbc
- affected 3bbec9773389112330954a6a64422eaa78d546c1 – < 89f4a4ca0ac3a933c750569a771c079a290b0721
- affected 3bbec9773389112330954a6a64422eaa78d546c1 – < 3e766526827acd542bcd36c20c4d5f397e0f6521
- affected 3bbec9773389112330954a6a64422eaa78d546c1 – < 35a3cd8fd65e15029eb90f1e510045b1bb071175
- affected 3bbec9773389112330954a6a64422eaa78d546c1 – < ce0e1cae26096fe959a0da5563a6d6d5a801d5fb
- affected 4.1
- unaffected < 4.1
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/b5a9f521e0a49a0266200fd535b32a9668ecb33b (opens in a new tab)
- https://git.kernel.org/stable/c/2fe0531dd73eff1de0f2584cb77716d645e548d5 (opens in a new tab)
- https://git.kernel.org/stable/c/d0e6d924a5484e005cae5aff6a0aa07a22f3c9ff (opens in a new tab)
- https://git.kernel.org/stable/c/bfffc98f3de92e0f76be7c7b72e63ac1776a6dbc (opens in a new tab)
- https://git.kernel.org/stable/c/89f4a4ca0ac3a933c750569a771c079a290b0721 (opens in a new tab)
- https://git.kernel.org/stable/c/3e766526827acd542bcd36c20c4d5f397e0f6521 (opens in a new tab)
- https://git.kernel.org/stable/c/35a3cd8fd65e15029eb90f1e510045b1bb071175 (opens in a new tab)
- https://git.kernel.org/stable/c/ce0e1cae26096fe959a0da5563a6d6d5a801d5fb (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-48848 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64504)Record last updated .