Answer in brief
CVE-2026-98383 records a High severity (CVSS 7.8) vulnerability in bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=004d4b274e2a1a895a0e5dc66158b90a7d463d44 <0f38472a2aa8704a6b514c0dfa9c32f3672b8f32 || >=004d4b274e2a1a895a0e5dc66158b90a7d463d44 <cae8674489f26edf7553fdd660599466cbb4c32f || >=004d4b274e2a1a895a0e5dc66158b90a7d463d44 <9f9e57b5a3a033f95f49ef9d541340cdbcb80abb || >=004d4b274e2a1a895a0e5dc66158b90a7d463d44 <df0072be6fc373cb22f9ea854d458b04e32a03cf || >=004d4b274e2a1a895a0e5dc66158b90a7d463d44 <b9bb0e735460751b620156f800a4279a28573392 || >=004d4b274e2a1a895a0e5dc66158b90a7d463d44 <37b18688cd18fd86d2f35c212df1611862a26cd5 || >=004d4b274e2a1a895a0e5dc66158b90a7d463d44 <fca71ead7a20290af1e2046983eeafae43d21af1 || >=004d4b274e2a1a895a0e5dc66158b90a7d463d44 <e4a62833adff6ef0fe7c0b90393204fe3c26b5c5 | 0f38472a2aa8704a6b514c0dfa9c32f3672b8f32, cae8674489f26edf7553fdd660599466cbb4c32f, 9f9e57b5a3a033f95f49ef9d541340cdbcb80abb, df0072be6fc373cb22f9ea854d458b04e32a03cf, b9bb0e735460751b620156f800a4279a28573392, 37b18688cd18fd86d2f35c212df1611862a26cd5, fca71ead7a20290af1e2046983eeafae43d21af1, e4a62833adff6ef0fe7c0b90393204fe3c26b5c5 |
| Linux/Linuxgeneric | 4.18 | Not reported |
Published upstream
Oct 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 9, 2026
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().
Quoted source text, attributed separately from HOL analysis.