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fix: CVE-2020-0543 (SRBDS): microcode mitigation misdetected (#492)

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Stéphane Lesimple
2026-04-06 00:58:49 +02:00
parent 0e440cbac6
commit 36263edc5a
1 changed files with 3 additions and 3 deletions
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6
src/libs/400_hw_check.sh
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@@ -1122,11 +1122,11 @@ check_cpu() {
read_msr $MSR_IA32_MCU_OPT_CTRL
ret=$?
if [ $ret = $READ_MSR_RET_OK ]; then
if [ "$ret_read_msr_value" = "0000000000000000" ]; then
#SRBDS mitigation control exists and is enabled via microcode
if [ "$((ret_read_msr_value_lo >> 0 & 1))" = 0 ]; then
#SRBDS mitigation control exists and is enabled via microcode (RNGDS_MITG_DIS bit is 0)
cap_srbds_on=1
else
#SRBDS mitigation control exists but is disabled via microcode
#SRBDS mitigation control exists but is disabled via microcode (RNGDS_MITG_DIS bit is 1)
cap_srbds_on=0
fi
else