Integer Overflow or Wraparound Affecting rv package, versions *


Severity

Recommended
low

Based on CentOS security rating.

Threat Intelligence

EPSS
0.21% (10th percentile)

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  • Snyk IDSNYK-CENTOS10-RV-20546692
  • published7 Oct 2026
  • disclosed17 Sept 2026

Introduced: 17 Sep 2026

CVE-2026-90136  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

There is no fixed version for Centos:10 rv.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rv package and not the rv package as distributed by Centos. See How to fix? for Centos:10 relevant fixed versions and status.

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

platform/x86/amd/hsmp: Reject negative power cap writes in hwmon

hsmp_hwmon_write() takes the user-supplied hwmon value as a signed long and assigns "val / MICROWATT_PER_MILLIWATT" to msg.args[0], which is a __u32. MICROWATT_PER_MILLIWATT is an unsigned long, so a negative write to power1_cap (e.g. "echo -1 > power1_cap") is first converted to a huge unsigned value by the division and then stored into the u32 argument.

As a result a nonsensical, multi-gigawatt socket power limit is sent to the SMU via HSMP_SET_SOCKET_POWER_LIMIT instead of the write being rejected.

Reject negative values with -EINVAL before the conversion.

Tested with HSMP enabled:

CAP=$(dirname $(grep -l amd_hsmp_hwmon
/sys/class/hwmon/hwmon*/name | head -1))/power1_cap

negative write

echo -1000000 > $CAP ; echo "ret=$?"

valid positive write must still work

echo 400000000 > $CAP ; echo "ret=$?"

Before:

echo -1000000 > $CAP ; echo "ret=$?"

ret=0 <- accepted; bogus limit sent to SMU

echo 400000000 > $CAP ; echo "ret=$?"

ret=0

After:

echo -1000000 > $CAP ; echo "ret=$?"

bash: echo: write error: Invalid argument ret=1 <- rejected with -EINVAL

echo 400000000 > $CAP ; echo "ret=$?"

ret=0 <- valid write still works

CVSS Base Scores

version 3.1