Answer in brief
CVE-2026-46172 records a Unknown severity vulnerability in ipv6: xfrm6: release dst on error in xfrm6_rcv_encap(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. 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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 <a0721bcd72641c32b281f227a94505b31cf54117 || >=0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 <a20b34f6e854fe6f2aa82528fae7a88759919eb4 || >=0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 <870560015ce6e0d8f841c6a8aba33c44be52c727 || >=0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 <c2efc4956981066df2fef1cc77391b523db6d8e4 || >=0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 <554c9b090c8ac5b1c5c507f4badf8d5d0c9c6e13 || >=0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 <9d5047782f9bd2829e529df69209bf3232eb561f || >=0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 <6a5eec0a2a0e99ec9743cf8f1c4082178811d90a || >=0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 <bc0fcb9823cd0894934cf968b525c575833d7078 | a0721bcd72641c32b281f227a94505b31cf54117, a20b34f6e854fe6f2aa82528fae7a88759919eb4, 870560015ce6e0d8f841c6a8aba33c44be52c727, c2efc4956981066df2fef1cc77391b523db6d8e4, 554c9b090c8ac5b1c5c507f4badf8d5d0c9c6e13, 9d5047782f9bd2829e529df69209bf3232eb561f, 6a5eec0a2a0e99ec9743cf8f1c4082178811d90a, bc0fcb9823cd0894934cf968b525c575833d7078 |
| Linux/Linuxgeneric | 5.8 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
Published upstream
May 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 8, 2026
In the Linux kernel, the following vulnerability has been resolved: ipv6: xfrm6: release dst on error in xfrm6_rcv_encap() xfrm6_rcv_encap() performs an IPv6 route lookup when the skb does not already have a dst attached. ip6_route_input_lookup() returns a referenced dst entry even when the lookup resolves to an error route. If dst->error is set, xfrm6_rcv_encap() drops the skb without attaching the dst to the skb and without releasing the reference returned by the lookup. Repeated packets hitting this path therefore leak dst entries. Release the dst before jumping to the drop path.
Quoted source text, attributed separately from HOL analysis.