Advanced Micro Devices (AND) said on Thursday its microprocessors are susceptible to both variants of the Spectre security flaw, Seperately, Intel said that some issued patches could cause computers to reboot more often than normal.

Previously, AMD had said that its chips were vulnerable to one variant of the Spectre bug, but there was "near zero risk" from the second Spectre variant and vulnerability to the second variant "had not been demonstrated on AMD processors to date."

As it has been widely reported, the set of flaws could let hackers steal sensitive information from nearly every modern computing device containing chips from Intel, AMD and ARM. But Intel's chips are most exposed to the flaws because they are vulnerable to all three variants of the flaw.

Now AMD admits that the second Spectre variant "is applicable to AMD" processors and that it would issue patches for its Ryzen and EPYC processors starting this week and older chips in the coming weeks.

"While we believe that AMD's processor architectures make it difficult to exploit Variant 2, we continue to work closely with the industry on this threat," Chief Technology Officer Mark Papermaster wrote in a blog post on Thursday wrote.

AMD added that the Radeon GPU architectures do not use speculative execution and thus are not susceptible to the threats.

Meanwhile, Intel on Thursday said that recently issued patches for flaws in its chips could cause computers using its older Broadwell and Haswell processors to reboot more often than normal and that Intel may need to issue updates to fix the buggy patches.