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Vulnerabilities

Vulnerability · CVE-2026-99099

CVE-2026-99099: x86/CPU/AMD: Fix AMD TLBI Erratum #1718

Published Oct 26, 2026 · catalog updated Oct 31, 2026 · Linux Linux Kernel

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-99099. EPSS is 0.13%. Act only if a listed version of Linux Linux Kernel is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.13%
Remediation
Not established
Affected products
linux kernel · package unmanaged

From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Fix AMD TLBI Erratum #1718 The processor may fail to invalidate a TLB entry while executing an INVLPGB/TLBSYNC instruction pair. Detect the erratum and apply a software workaround when a microcode fix is not present. The Linux kernel CVE team has assigned CVE-2026-99099 to this issue. Affected and fixed versions =========================== Issue introduced in 6.15 with commit 82378c6c2f435dba66145609de16bf44a9de6303 and fixed in 6.18.57 with comm

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • linux kernelversion unspecified
  • package unmanagedversion unspecified

How to fix CVE-2026-99099

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-99099. EPSS is 0.13%. Act only if a listed version of Linux Linux Kernel is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.13%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 26, 2026 · Linux Kernel CVE

    Detected

    From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Fix AMD TLBI Erratum #1718 The processor may fail to invalidate a TLB entry while executing an INVLPGB/TLBSYNC instruction pair. Detect the erratum and apply a software workaround when a microcode fix is not present. The Linux kernel CVE team has assigned CVE-2026-99099

  2. Oct 31, 2026 · NIST NVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Fix AMD TLBI Erratum #1718 The processor may fail to invalidate a TLB entry while executing an INVLPGB/TLBSYNC instruction pair. Detect the erratum and apply a software workaround when a microcode fix is not present.

Sources

  • CVE.orgVulnerability recordCVE-2026-99099

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-99099

    30-day exploitation probability 0.13%

    first.org
  • Linux Kernel CVEVendor advisoryCVE-2026-99099

    From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Fix AMD TLBI Erratum #1718 The processor may fail to invalidate a TLB entry while executing an INVLPGB/TLBSYNC instruction pair. Detect the erratum an

    git.kernel.org
  • NIST NVDVulnerability recordCVE-2026-99099

    In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Fix AMD TLBI Erratum #1718 The processor may fail to invalidate a TLB entry while executing an INVLPGB/TLBSYNC instruction pair. Detect the erratum and apply a software workaround when a microcode

    nvd.nist.gov
  • Snyk Vulnerability DatabasePackage advisorySNYK-UNMANAGED-TORVALDSLINUX-21735517

    Denial of Service (DoS)

    security.snyk.io
  • Tenable CVE DatabaseVulnerability recordCVE-2026-99099

    In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Fix AMD TLBI Erratum #1718 The processor may fail to invalidate a TLB entry while executing an INVLPGB/TLBSYNC instruction pair. Detect the erratum and apply a software workaround when a microcode fix is not present.

    tenable.com

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 4, 2026
  • Tenable CVE DatabaseNov 1, 2026
  • NIST NVDNov 1, 2026
  • Snyk Vulnerability DatabaseOct 29, 2026
  • Linux Kernel CVEOct 28, 2026
  • CVE.orgOct 27, 2026