CVE-2026-31628

A flaw was found in the Linux kernel. On systems utilizing Zen1 processors, the hardware divider can, under specific conditions, retain partial results from prior operations. A local attacker can exploit this vulnerability to access these residual results, leading to information disclosure.

Zen1 floating-point divider state can leak prior results across contexts; microcode/kernel coordination clears FPDSS appropriately. Red Hat follows AMD guidance: keep firmware and kernels current on Zen1 systems.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.