CVE-2026-98146: Linux kernel · accel/amdxdna: Remove __counted_by from struct amdxdna_cmd_chain
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.09% chance of exploitation in 30 days – higher than 0% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Sep 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 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix has been implemented in the Linux kernel by removing the __counted_by annotation from the amdxdna_cmd_chain structure. Users should apply the updated kernel versions that include this fix. Patch status is not explicitly confirmed in the provided data; therefore, users should consult the vendor advisory for the latest remediation guidance.
Description
A vulnerability in the Linux kernel's accel/amdxdna component involves improper bounds checking due to a flexible array annotated with __counted_by using a userspace-controlled command_count. This can lead to a kernel panic if command_count is concurrently modified to zero by userspace. The issue has been resolved by removing the __counted_by annotation to avoid relying on the userspace-controlled value for bounds checking.
References
- ubuntu.com/security/CVE-2026-98146 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98146 (opens in a new tab)
- git.kernel.org/stable/c/b3709d354545e70388177500761f92d906c4dfd6 (opens in a new tab)
- git.kernel.org/stable/c/52f3e086760a9a3e02a46a10b57caffd73b1c204 (opens in a new tab)
- git.kernel.org/stable/c/93fa3e925b15b0ded0a549fe7f12bfbb1c4e171a (opens in a new tab)