CVE-2026-98119: Linux kernel · netfs: break unbuffered write when netfs_alloc_subrequest() fails
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 properly handle the error condition in netfs_prepare_write() when netfs_alloc_subrequest() fails. Users should apply the updated kernel versions containing this fix. Patch status is not explicitly confirmed in the input data; therefore, check the vendor advisory for current remediation guidance.
Description
A vulnerability in the Linux kernel's netfs component was resolved that could cause a null pointer dereference when netfs_alloc_subrequest() fails. This occurs because netfs_prepare_write() attempts to initialize members of a NULL subrequest pointer, leading to a crash. The issue was identified through fault injection testing and has been fixed by properly handling the error condition in netfs_prepare_write().
References
- ubuntu.com/security/CVE-2026-98119 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98119 (opens in a new tab)
- git.kernel.org/stable/c/cf6f93b8b06acf57de62dacbe71a3b99c68656a7 (opens in a new tab)
- git.kernel.org/stable/c/19f246c795e940dc5f11cd5bc0cb1e81bc7b7090 (opens in a new tab)
- git.kernel.org/stable/c/8fb45a934661419c04a44d4cfea1e0df7dcf2805 (opens in a new tab)