CVE-2026-98064: Linux kernel · bpf: Fix NULL-ptr-deref when showing a void BTF type
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 12:55 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 7% 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 to prevent the NULL pointer dereference by falling back to a safe show operation when the resolved type has no show operation. Users should update to a patched kernel version containing this fix. Since the vulnerability affects specific linux-hwe-edge kernel versions, upgrading to a fixed version is recommended. Patch status is not explicitly stated in the input data; therefore, check the vendor advisory for the latest remediation guidance.
Description
A NULL pointer dereference vulnerability in the Linux kernel's BPF subsystem was fixed. The issue occurs when showing a void BTF type in the btf_modifier_show() function, which calls a show operation unconditionally on a void type that lacks this operation, causing a NULL pointer dereference. This vulnerability affects specific Linux kernel versions used in the linux-hwe-edge product line.
References
- ubuntu.com/security/CVE-2026-98064 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98064 (opens in a new tab)
- git.kernel.org/stable/c/4ea508b9ebd78bce7f212166d2e2cba66b875f08 (opens in a new tab)
- git.kernel.org/stable/c/98f1cb95221332139acf514350ae2cae3b8656c5 (opens in a new tab)
- git.kernel.org/stable/c/717abdfd1d559d01fdd102023f0a990fb0437240 (opens in a new tab)
- git.kernel.org/stable/c/5324f4e75ff6e9c2ca2e267c5f34f0937f9d0ac9 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-98064 (opens in a new tab)
- git.kernel.org/stable/c/62b00074b58ccf43f61f70f2cfcac80937b530c6 (opens in a new tab)
- git.kernel.org/stable/c/86d86f9fcf62dd3654090fbf3cf7ae5f42aa0706 (opens in a new tab)
- git.kernel.org/stable/c/adb15557a641cb8a31f83e5f62bd12042b138c7b (opens in a new tab)
- git.kernel.org/stable/c/cf528f2d7a0a54f2a3c6d439cfa3c8d7dfe90d8d (opens in a new tab)