CVE-2026-68365

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ee57992c053a6d395e98ced2d4c9cc3b42d8c27aaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 64b687f9694777754285d489abbefa3784bc78daaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cbe00048b69d67c8a78293cb7681b4c9963b26c7affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1e47d8228b8767c8ac722aedb388f70adeeda43daffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < faaddd811c5099f11a5f52e68a6b31a5898cda4faffected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux6.6.148 <= 6.6.*unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc5 <= *unaffected

Weaknesses

References