CVE-2026-68365

USB: serial: io_edgeport: cap received transmit credits

State: Published
Severity: Not scored
Published: Aug 10, 2026
Updated: Aug 19, 2026
Reserved: Jul 30, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

USB: serial: io_edgeport: cap received transmit credits

The interrupt-status packet reports transmit credits returned by the device. edge_interrupt_callback() adds the 16-bit value to txCredits without checking maxTxCredits.

edge_write() uses txCredits minus the software FIFO count as the amount of data that fits. Since the FIFO is allocated with maxTxCredits bytes, txCredits exceeding maxTxCredits can cause OOB write in ring buffer.

Cap accumulated credits at maxTxCredits. Conforming devices should never hit the cap.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before d9dd87bc1d7e8476d29d68883542ec6198d385c6Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 5b39d3da15344b87ef54a0a04f65b52622747e99Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 63c4e55d0741cfaf00515e807cad9293445cd348Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before ee57992c053a6d395e98ced2d4c9cc3b42d8c27aAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 64b687f9694777754285d489abbefa3784bc78daAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before cbe00048b69d67c8a78293cb7681b4c9963b26c7Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 1e47d8228b8767c8ac722aedb388f70adeeda43dAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before faaddd811c5099f11a5f52e68a6b31a5898cda4fAffected
LinuxLinux	2.6.12Affected before 2.6.12Not affected 5.10.265 through 5.10.Not affected 5.15.216 through 5.15.Not affected 6.1.183 through 6.1.Not affected 6.6.148 through 6.6.Not affected 6.12.101 through 6.12.Not affected 6.18.42 through 6.18.Not affected 7.1.6 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before d9dd87bc1d7e8476d29d68883542ec6198d385c6Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 5b39d3da15344b87ef54a0a04f65b52622747e99Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 63c4e55d0741cfaf00515e807cad9293445cd348Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before ee57992c053a6d395e98ced2d4c9cc3b42d8c27aAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 64b687f9694777754285d489abbefa3784bc78daAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before cbe00048b69d67c8a78293cb7681b4c9963b26c7Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 1e47d8228b8767c8ac722aedb388f70adeeda43dAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before faaddd811c5099f11a5f52e68a6b31a5898cda4fAffected

LinuxLinux

2.6.12Affected
before 2.6.12Not affected
5.10.265 through 5.10.*Not affected
5.15.216 through 5.15.*Not affected
6.1.183 through 6.1.*Not affected
6.6.148 through 6.6.*Not affected
6.12.101 through 6.12.*Not affected
6.18.42 through 6.18.*Not affected
7.1.6 through 7.1.*Not affected
7.2 and laterNot affected

References

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