Answer in brief
CVE-2026-98952 records a High severity (CVSS 7.3) vulnerability in pfcp: make sure the SEID is linear before reading it. 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 7.3. 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 | >=6dd514f48110ebb4bf36875b9e7e02d07b589caa <3192a5e398c64d48aad64a09e29643e327369bc4 || >=6dd514f48110ebb4bf36875b9e7e02d07b589caa <b18a6496495495e2dc27e525aa3315a0c59b9513 || >=6dd514f48110ebb4bf36875b9e7e02d07b589caa <2fb6d05f706d79bbdc88835be2f4f45ab56dd819 || >=6dd514f48110ebb4bf36875b9e7e02d07b589caa <23609bce9e1de525d1d0e73fc68c6e7971d0b49e | 3192a5e398c64d48aad64a09e29643e327369bc4, b18a6496495495e2dc27e525aa3315a0c59b9513, 2fb6d05f706d79bbdc88835be2f4f45ab56dd819, 23609bce9e1de525d1d0e73fc68c6e7971d0b49e |
| Linux/Linuxgeneric | 6.10 | Not reported |
Published upstream
Oct 23, 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 23, 2026
In the Linux kernel, the following vulnerability has been resolved: pfcp: make sure the SEID is linear before reading it pfcp_encap_recv() only makes sure that the UDP header and the 4 byte PFCP header are in the linear area. When the S flag is set, pfcp_session_recv() then reads the 8 byte SEID that follows, which is not covered by the pskb_may_pull() check. A short PFCP packet with the S flag set, or one whose session header lies in a fragment, therefore makes pfcp_session_recv() read beyond the end of the packet data, and whatever it finds there is stored in the tunnel metadata that flower later classifies on. Pull up to the end of the SEID before reading it, and drop packets that are too short to contain it. Reload the header pointer afterwards since pskb_may_pull() may reallocate the skb head. Use offsetofend() rather than sizeof(struct pfcphdr_session): the structure is not packed, so its size is 16 bytes because of the alignment of the __be64 member, while the header on the wire is only 12 bytes, and valid session messages would be dropped.
Quoted source text, attributed separately from HOL analysis.