CVE-2026-53196

Summary

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 ]

Affected Software

Weaknesses

ADP Enrichment

kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info()

Additional References

• https://access.redhat.com/security/cve/CVE-2026-53196
• https://bugzilla.redhat.com/show_bug.cgi?id=2492750
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53196.json

References

• https://git.kernel.org/stable/c/e168db91442b94e64fa82a7dd297983d48ea5cc0
• https://git.kernel.org/stable/c/561edb021486e6723d841926aa4b48097da06190
• https://git.kernel.org/stable/c/cfd634f6dfd40c49a84f9bddc2867a80e2e2623a
• https://git.kernel.org/stable/c/d92f17af7097d10bdeddf26f66f34b354104b277
• https://git.kernel.org/stable/c/b849f30d1a9e66aae6b715aaef66e427390cb081
• https://git.kernel.org/stable/c/f96cf7bf9fbf15d7fcf0c91fec47ba8a010369ea
• https://git.kernel.org/stable/c/d214d2341d4f9f447e36a7d012cdf6a6631a55f1
• https://git.kernel.org/stable/c/183c1076eca43bbb3e7bdf597456f91d81c73e74

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