CVE-2026-53196

Description

In the Linux kernel, the following vulnerability has been resolved: USB: serial: io_ti: fix heap overflow in get_manuf_info() get_manuf_info() reads le16_to_cpu(rom_desc->Size) bytes from the device I2C EEPROM into a buffer allocated with kmalloc_obj(), which is sizeof(struct edge_ti_manuf_descriptor) = 10 bytes. The Size field comes from the device and is only validated (in check_i2c_image()) to make sure the descriptor fits within TI_MAX_I2C_SIZE (16384 bytes), not against the destination buffer size. A malicious USB device can therefore set Size to any value up to 16377, causing a heap overflow of up to 16367 bytes when plugged into a host running this driver. valid_csum() is called after read_rom() and also iterates buffer[0..Size-1], compounding the out-of-bounds access. Fix by rejecting descriptors with unexpected length before calling read_rom(). [ johan: amend commit message; also check for short descriptors ]

CVSS v3.1 Score

6.8

MEDIUM

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

EPSS — Exploit Prediction

0.0028

Probability of exploitation

0.20%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

References

Other References

https://git.kernel.org/stable/c/183c1076eca43bbb3e7bdf597456f91d81c73e74 https://git.kernel.org/stable/c/561edb021486e6723d841926aa4b48097da06190 https://git.kernel.org/stable/c/b849f30d1a9e66aae6b715aaef66e427390cb081 https://git.kernel.org/stable/c/cfd634f6dfd40c49a84f9bddc2867a80e2e2623a https://git.kernel.org/stable/c/d214d2341d4f9f447e36a7d012cdf6a6631a55f1 https://git.kernel.org/stable/c/d92f17af7097d10bdeddf26f66f34b354104b277 https://git.kernel.org/stable/c/e168db91442b94e64fa82a7dd297983d48ea5cc0 https://git.kernel.org/stable/c/f96cf7bf9fbf15d7fcf0c91fec47ba8a010369ea https://access.redhat.com/security/cve/CVE-2026-53196 https://bugzilla.redhat.com/show_bug.cgi?id=2492750

Frequently Asked Questions

What is CVE-2026-53196? +

In the Linux kernel, the following vulnerability has been resolved: USB: serial: io_ti: fix heap overflow in get_manuf_info() get_manuf_info() reads le16_to_cpu(rom_desc->Size) bytes from the device I2C EEPROM into a buffer allocated with kmalloc_obj(), which is sizeof(struct edge_ti_manuf_descriptor) = 10 bytes. The Size field comes from the device and is only validated (in check_i2c_image()) to make sure the descriptor fits within TI_MAX_I2C_SIZE (16384 bytes), not against the destination buffer size. A malicious USB device can therefore set Size to any value up to 16377, causing a heap overflow of up to 16367 bytes when plugged into a host running this driver. valid_csum() is called after read_rom() and also iterates buffer[0..Size-1], compounding the out-of-bounds access. Fix by rejecting descriptors with unexpected length before calling read_rom(). [ johan: amend commit message; also check for short descriptors ] It has a CVSS v3.1 base score of 6.8 (MEDIUM).

How severe is CVE-2026-53196? +

CVE-2026-53196 has a CVSS v3.1 score of 6.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0028, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-53196? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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