High 7.8Published Jun 25, 2026

CVE-2026-53195USB: serial: io_ti: fix heap overflow in build_i2c_fw_hdr()

Updated under an hour ago (Oct 27, 2026, 5:10 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: USB: serial: io_ti: fix heap overflow in build_i2c_fw_hdr() build_i2c_fw_hdr() allocates a fixed-size buffer of (16*1024 - 512) + sizeof(struct ti_i2c_firmware_rec) bytes, then copies le16_to_cpu(img_header->Length) bytes into it without validating that Length fits within the available space after the firmware record header. img_header->Length is a __le16 from the firmware file and can be up to 65535. check_fw_sanity() validates the total firmware size but not img_header->Length specifically. Fix by rejecting images where img_header->Length exceeds the available destination space.

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Jun 25, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3e187152f44d76d7633a3855ffd0099e1588b82a; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before b7faf660eefa2047ebc2959ff76da2b6eae2e9e3; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2fd64bf0ad66ab5de0c73524591d879427ba5aba; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4cb722747ed25971f35cc47ce5c0e79d7f717713; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 130d6567eb148040eed1b73e1414ad6c27d22bd5; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 294692d3296eee3391c348d7ea6401916d27806c; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 5a79b634ee58786ca627268daefa7744f2af2e14; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 builds before 0fd2b00b2d3d05e3eaa13342b3dfb0fa85c226ae	CNA record
linux linux_kernel linux:linux_kernel	from 2.6.12.1 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 2.6.12; and 11 more ranges	NVD

References

References

https://git.kernel.org/stable/c/3e187152f44d76d7633a3855ffd0099e1588b82a	patch
https://git.kernel.org/stable/c/b7faf660eefa2047ebc2959ff76da2b6eae2e9e3	patch
https://git.kernel.org/stable/c/2fd64bf0ad66ab5de0c73524591d879427ba5aba	patch
https://git.kernel.org/stable/c/4cb722747ed25971f35cc47ce5c0e79d7f717713	patch
https://git.kernel.org/stable/c/130d6567eb148040eed1b73e1414ad6c27d22bd5	patch
https://git.kernel.org/stable/c/294692d3296eee3391c348d7ea6401916d27806c	patch
https://git.kernel.org/stable/c/5a79b634ee58786ca627268daefa7744f2af2e14	patch
https://git.kernel.org/stable/c/0fd2b00b2d3d05e3eaa13342b3dfb0fa85c226ae	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.