CVE-2026-72237Public exploit

Kernel-address disclosure via one-sided BRS filtering

Published Aug 15, 2026 · Updated Aug 15, 2026

Information disclosure in the Linux kernel allows local users on AMD Zen 3 systems to read kernel addresses through perf BRS output. The amd_brs_match_plm() filter validates the branch-to address but leaves the kernel branch-from address unchecked in user-only samples. Exploitation requires local perf access and X86_FEATURE_BRS, which the upstream record limits to Zen 3 processors.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in the Linux kernel allows local users on AMD Zen 3 systems to read kernel addresses through perf BRS output. The amd_brs_match_plm() filter validates the branch-to address but leaves the kernel branch-from address unchecked in user-only samples. Exploitation requires local perf access and X86_FEATURE_BRS, which the upstream record limits to Zen 3 processors.

The record

CVE
CVE-2026-72237
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-1220
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.19
  2. Affected versionversion=8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08 <046f6244da9b68e463a849b21446b9424e531491
  3. Affected versionversion=8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08 <2e706be56f418718bb3ae66c0aa94f9b61150e6d
  4. Affected versionversion=8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08 <47915e855fb38b42133e31ba917d99565f862154
  5. Affected versionversion=8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08 <90843d00dbc61220b66408ea0d8775cae9e51f70
  6. Affected versionversion=8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08 <ac44b4a3d6137489f8fa2e794b12e849c6b22eaa

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08 <046f6244da9b68e463a849b21446b9424e531491; version=8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08 <2e706be56f418718bb3ae66c0aa94f9b61150e6d; version=8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08 <47915e855fb38b42133e31ba917d99565f862154; version=8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08 <90843d00dbc61220b66408ea0d8775cae9e51f70; version=8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08 <ac44b4a3d6137489f8fa2e794b12e849c6b22eaa

Published CVSS scores

3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.3SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1220Insufficient Granularity of Access Control

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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