CVE-2026-98873
netfilter: nf_conntrack_expect: zero at allocation time
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_expect: zero at allocation time There are occasional LLM hints wrt. leaking uninitialized data to userspace via ctnetlink. Just zero at allocation time, expectations are not frequently used these days. Intentionally keeps _init as-is because we could theoretically support re-init, so add the missing exp->dir there.
INFO
Published Date :
Oct. 23, 2026, 12:18 p.m.
Last Modified :
Oct. 23, 2026, 12:18 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Apply the netfilter patch to zero memory.
- Zero expectations memory at allocation time.
- Add missing exp->dir to _init function.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-98873.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-98873 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-98873
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-98873 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-98873 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Oct. 23, 2026
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_expect: zero at allocation time There are occasional LLM hints wrt. leaking uninitialized data to userspace via ctnetlink. Just zero at allocation time, expectations are not frequently used these days. Intentionally keeps _init as-is because we could theoretically support re-init, so add the missing exp->dir there. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/98xxx/CVE-2026-98873.json">CVE-2026-98873</a> Added Reference https://git.kernel.org/stable/c/241ccd2fed9051db443aadce248fc0ab30f55e97 Added Reference https://git.kernel.org/stable/c/39cb6ff947c16a576ea68c5f272e634acdcb0085 Added Reference https://git.kernel.org/stable/c/824397af7bfe14edad374c64253dae0187ca623d Added Reference https://git.kernel.org/stable/c/90545aa07a183887e9d72ce573c18e08f62e2c91 Added Reference https://git.kernel.org/stable/c/9c11d7ea5ff4dbe162e79f00188814ef5483c295 Added Reference https://git.kernel.org/stable/c/a39ecb856514274c80d0fac4d128dba6b266a8ed Added Reference https://git.kernel.org/stable/c/b7f3ee925aee9f1f547d539bc03c35433c238958