CVE-2026-98045: Linux kernel · bpf: Mark faultable stack helpers as sleepable
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 14:05 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% 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 is available that marks the faultable BPF stack helper prototypes as sleepable and enforces context checks to prevent their use in non-sleepable contexts. Users should apply the official kernel updates that include this fix. No additional mitigation steps are indicated.
Description
A vulnerability in the Linux kernel's BPF subsystem involves faultable stack helper functions that were not correctly marked as sleepable. This could allow these helpers to be called from non-sleepable contexts, such as RCU or preemption-disabled regions, potentially causing improper behavior. The issue has been resolved by marking the faultable prototypes as sleepable and enforcing context checks to reject invalid calls.
References
- ubuntu.com/security/CVE-2026-98045 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98045 (opens in a new tab)
- git.kernel.org/stable/c/3014e8a8bdad55075d89836ad9c10710a9a69837 (opens in a new tab)
- git.kernel.org/stable/c/9d02927fdf4e930893c92e35fed01a2704496900 (opens in a new tab)
- git.kernel.org/stable/c/19e8d5a98afd071d8c1c5adeccf92b3c42eddc70 (opens in a new tab)
- git.kernel.org/stable/c/44b8d370f2725bad215da3e67668e98ba96671bd (opens in a new tab)