CVE-2026-99099: Linux kernel · x86/CPU/AMD: Fix AMD TLBI Erratum #1718
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 28 Oct 2026, 22:30 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 26 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10linuxpkg:deb/ubuntu/linux?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-oraclepkg:deb/ubuntu/linux-oracle?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
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.
References
- ubuntu.com/security/CVE-2026-99099 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-99099 (opens in a new tab)
- git.kernel.org/stable/c/e3e6779f77ab6f0a1aa80e24868d2d89f31053fe (opens in a new tab)
- git.kernel.org/stable/c/098d80b04d0fe02889c332d061db968f070b83a6 (opens in a new tab)
- git.kernel.org/stable/c/87db7795cbaaf636ae22ae031f4906db7bb77803 (opens in a new tab)