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Vulnerability record · CVE-2026-53195 · published 25 June 2026

CVE-2026-53195: Linux kernel out-of-bounds write vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.14% · top 97.0% CWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score
0.14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
6 Jul 2026Last modified by NVD

Description

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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-53195), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.