CVE-2026-98383bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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().
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 004d4b274e2a1a895a0e5dc66158b90a7d463d44 builds before 0f38472a2aa8704a6b514c0dfa9c32f3672b8f32; from 004d4b274e2a1a895a0e5dc66158b90a7d463d44 before cae8674489f26edf7553fdd660599466cbb4c32f; from 004d4b274e2a1a895a0e5dc66158b90a7d463d44 before 9f9e57b5a3a033f95f49ef9d541340cdbcb80abb; from 004d4b274e2a1a895a0e5dc66158b90a7d463d44 before df0072be6fc373cb22f9ea854d458b04e32a03cf; from 004d4b274e2a1a895a0e5dc66158b90a7d463d44 before b9bb0e735460751b620156f800a4279a28573392; from 004d4b274e2a1a895a0e5dc66158b90a7d463d44 before 37b18688cd18fd86d2f35c212df1611862a26cd5; from 004d4b274e2a1a895a0e5dc66158b90a7d463d44 before fca71ead7a20290af1e2046983eeafae43d21af1; from 004d4b274e2a1a895a0e5dc66158b90a7d463d44 before e4a62833adff6ef0fe7c0b90393204fe3c26b5c5 | CNA record |
References
- https://git.kernel.org/stable/c/0f38472a2aa8704a6b514c0dfa9c32f3672b8f32
- https://git.kernel.org/stable/c/cae8674489f26edf7553fdd660599466cbb4c32f
- https://git.kernel.org/stable/c/9f9e57b5a3a033f95f49ef9d541340cdbcb80abb
- https://git.kernel.org/stable/c/df0072be6fc373cb22f9ea854d458b04e32a03cf
- https://git.kernel.org/stable/c/b9bb0e735460751b620156f800a4279a28573392
- https://git.kernel.org/stable/c/37b18688cd18fd86d2f35c212df1611862a26cd5
- https://git.kernel.org/stable/c/fca71ead7a20290af1e2046983eeafae43d21af1
- https://git.kernel.org/stable/c/e4a62833adff6ef0fe7c0b90393204fe3c26b5c5
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.