CVE-2026-98844: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-vjf5-4hx8-9557
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Advisory Summary

CVE-2026-98844 is a security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-98844 at a Glance

CVE Identifier CVE-2026-98844
GHSA Identifier GHSA-vjf5-4hx8-9557
Severity N/A
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-98844

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-98844, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under General Security Weakness. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

In the Linux kernel, the following vulnerability has been resolved: netfs: clear post-EOF pagecache when extending a file via write Fix netfs to erase the contents of a hole created after the EOF by an ordinary write if dirty data has been previously left there by writes through an mmapped region. Neither the buffered nor the unbuffered/DIO write path clears that stale pagecache. Zero the tail of the folio straddling the EOF before an extending write. That is the only folio that can hold data written past the EOF through an mmap, as pages wholly beyond the EOF can't be faulted in. The folio is zeroed rather than dropped so a concurrent extending write can't lose data. Both write paths downgrade the i_rwsem to shared, so extending writes can run concurrently and the i_size read by the caller may be stale by the time the folio is locked. Re-read i_size under the folio lock and clamp the zeroed range up to it, so a racing write that already put data into the folio isn't clobbered. Wait for any writeback on the folio to finish before zeroing it so that the pagecache isn't modified while it may still be read by the transport during transmission. Honour IOCB_NOWAIT by returning -EAGAIN rather than blocking on the folio lock, on writeback, or in folio_mkclean()'s rmap walk when the folio is mapped. truncate_pagecache() can't be used here: it must be called with the i_rwsem held exclusively, but these write paths only hold it shared, and it would block unconditionally, breaking IOCB_NOWAIT. Callers that hold i_rwsem exclusively for the whole resize (truncate, setattr, fallocate, clone) exclude any genuine concurrent buffered writer, so staleness can instead be decided from the folio's dirty state, as pagecache_isize_extended() already does for filesystems that serialise writes against truncate/setattr via a single i_rwsem. Export netfs_clear_stale_post_isize() helper to handle such case. The helper is required by the CIFS client to fix generic/363.

References

NVD — CVE-2026-98844 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-98844
git.kernel.org/stable/c/69bf14300b... WEB
https://git.kernel.org/stable/c/69bf14300b50631e7c2271289d347bbd1b19a06c
git.kernel.org/stable/c/98f6a4589e... WEB
https://git.kernel.org/stable/c/98f6a4589e0f5f6cf819b8dd45605efc481c06ce
git.kernel.org/stable/c/a7036a7367... WEB
https://git.kernel.org/stable/c/a7036a73671fc83d299bc770710fe996d9fef9ca
git.kernel.org/stable/c/f8f7d86b35... WEB
https://git.kernel.org/stable/c/f8f7d86b3537e885ee620898a38b749fba8a8456

Frequently Asked Questions

What is CVE-2026-98844?
CVE-2026-98844 is a security vulnerability in Software classified as a security vulnerability vulnerability under General Security Weakness.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-98844?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-98844?
CVE-2026-98844 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-98844?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
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  "schema_version" : "1.4.0",
  "id" : "GHSA-vjf5-4hx8-9557",
  "modified" : "2026-10-18T18:32:05Z",
  "published" : "2026-10-18T18:32:05Z",
  "aliases" : [ "CVE-2026-98844" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: clear post-EOF pagecache when extending a file via write\n\nFix netfs to erase the contents of a hole created after the EOF by an\nordinary write if dirty data has been previously left there by writes\nthrough an mmapped region.  Neither the buffered nor the unbuffered/DIO\nwrite path clears that stale pagecache.\n\nZero the tail of the folio straddling the EOF before an extending\nwrite.  That is the only folio that can hold data written past the EOF\nthrough an mmap, as pages wholly beyond the EOF can't be faulted in.\nThe folio is zeroed rather than dropped so a concurrent extending write\ncan't lose data.\n\nBoth write paths downgrade the i_rwsem to shared, so extending writes\ncan run concurrently and the i_size read by the caller may be stale by\nthe time the folio is locked.  Re-read i_size under the folio lock and\nclamp the zeroed range up to it, so a racing write that already put\ndata into the folio isn't clobbered.\n\nWait for any writeback on the folio to finish before zeroing it so that\nthe pagecache isn't modified while it may still be read by the transport\nduring transmission.  Honour IOCB_NOWAIT by returning -EAGAIN rather\nthan blocking on the folio lock, on writeback, or in folio_mkclean()'s\nrmap walk when the folio is mapped.\n\ntruncate_pagecache() can't be used here: it must be called with the\ni_rwsem held exclusively, but these write paths only hold it shared,\nand it would block unconditionally, breaking IOCB_NOWAIT.\n\nCallers that hold i_rwsem exclusively for the whole resize (truncate,\nsetattr, fallocate, clone) exclude any genuine concurrent buffered\nwriter, so staleness can instead be decided from the folio's dirty\nstate, as pagecache_isize_extended() already does for filesystems that\nserialise writes against truncate/setattr via a single i_rwsem.\nExport netfs_clear_stale_post_isize() helper to handle such case.\n\nThe helper is required by the CIFS client to fix generic/363.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-98844"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/69bf14300b50631e7c2271289d347bbd1b19a06c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/98f6a4589e0f5f6cf819b8dd45605efc481c06ce"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a7036a73671fc83d299bc770710fe996d9fef9ca"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f8f7d86b3537e885ee620898a38b749fba8a8456"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-18T16:17:38Z"
  }
}