CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL An LWT_SEG6LOCAL program can invalidate its cached SRH with bpf_lwt_seg6_adjust_srh() and then call bpf_skb_pull_data(). The latter may reallocate skb->head, leaving the per-CPU SRH pointer dangling. Post-program SRH validation then writes through that pointer. Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL programs so the verifier rejects this unsafe helper combination. Other LWT program types continue to expose the helper through lwt_out_func_proto().
INFO
Published Date :
Oct. 9, 2026, 8:16 a.m.
Last Modified :
Oct. 9, 2026, 8:16 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the Linux kernel to the latest version.
- Ensure verifier rejects unsafe helper combinations.
- Apply relevant security patches promptly.
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-2026-98383.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-98383 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-2026-98383
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-2026-98383 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-98383 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. 09, 2026
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL An LWT_SEG6LOCAL program can invalidate its cached SRH with bpf_lwt_seg6_adjust_srh() and then call bpf_skb_pull_data(). The latter may reallocate skb->head, leaving the per-CPU SRH pointer dangling. Post-program SRH validation then writes through that pointer. Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL programs so the verifier rejects this unsafe helper combination. Other LWT program types continue to expose the helper through lwt_out_func_proto(). Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/98xxx/CVE-2026-98383.json">CVE-2026-98383</a> Added Reference https://git.kernel.org/stable/c/0f38472a2aa8704a6b514c0dfa9c32f3672b8f32 Added Reference https://git.kernel.org/stable/c/37b18688cd18fd86d2f35c212df1611862a26cd5 Added Reference https://git.kernel.org/stable/c/9f9e57b5a3a033f95f49ef9d541340cdbcb80abb Added Reference https://git.kernel.org/stable/c/b9bb0e735460751b620156f800a4279a28573392 Added Reference https://git.kernel.org/stable/c/cae8674489f26edf7553fdd660599466cbb4c32f Added Reference https://git.kernel.org/stable/c/df0072be6fc373cb22f9ea854d458b04e32a03cf Added Reference https://git.kernel.org/stable/c/e4a62833adff6ef0fe7c0b90393204fe3c26b5c5 Added Reference https://git.kernel.org/stable/c/fca71ead7a20290af1e2046983eeafae43d21af1