Answer in brief
CVE-2026-68299 records a Unknown severity vulnerability in vmxnet3: fix BUG_ON in vmxnet3_get_hdr_len() for Geneve packets. 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.
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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc <667b6e52048eaf4dbcf1707ed87ffd44abb9cb38 || >=45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc <28cb5d8d13b4c1faf3f688f62e5df82fe7b438d8 || >=45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc <4fdb0f162ccdbe9626863b10003855703253fa29 || >=45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc <b28596baf87e25a078789f1c05817c8a3bf71257 || >=45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc <34a71f5361fc3adb5b7138da78750b0d535a8252 | 667b6e52048eaf4dbcf1707ed87ffd44abb9cb38, 28cb5d8d13b4c1faf3f688f62e5df82fe7b438d8, 4fdb0f162ccdbe9626863b10003855703253fa29, b28596baf87e25a078789f1c05817c8a3bf71257, 34a71f5361fc3adb5b7138da78750b0d535a8252 |
| Linux/Linuxgeneric | 4.2 | Not reported |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 10, 2026
In the Linux kernel, the following vulnerability has been resolved: vmxnet3: fix BUG_ON in vmxnet3_get_hdr_len() for Geneve packets vmxnet3_get_hdr_len() assumes gdesc->rcd.v4/v6/tcp always describe the outer header, but for a Geneve-encapsulated packet the device can set them based on the inner header instead, signalled by the VMXNET3_RCD_HDR_INNER_SHIFT bit in the completion descriptor. Since the function never skips the outer encapsulation, this mismatch triggers: - BUG_ON(hdr.ipv4->protocol != IPPROTO_TCP), because the outer protocol is UDP (Geneve), not TCP. - BUG_ON(hdr.eth->h_proto != ...), when the tunnel's outer and inner IP versions differ (e.g. outer IPv6/inner IPv4 or vice versa). Check VMXNET3_RCD_HDR_INNER_SHIFT up front and bail out, since the function cannot locate the inner header it would need to parse. Also convert the remaining BUG_ON()s in this function to return 0 defensively.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-68299 records a Unknown severity vulnerability in vmxnet3: fix BUG_ON in vmxnet3_get_hdr_len() for Geneve packets. 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.
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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc <667b6e52048eaf4dbcf1707ed87ffd44abb9cb38 || >=45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc <28cb5d8d13b4c1faf3f688f62e5df82fe7b438d8 || >=45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc <4fdb0f162ccdbe9626863b10003855703253fa29 || >=45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc <b28596baf87e25a078789f1c05817c8a3bf71257 || >=45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc <34a71f5361fc3adb5b7138da78750b0d535a8252 | 667b6e52048eaf4dbcf1707ed87ffd44abb9cb38, 28cb5d8d13b4c1faf3f688f62e5df82fe7b438d8, 4fdb0f162ccdbe9626863b10003855703253fa29, b28596baf87e25a078789f1c05817c8a3bf71257, 34a71f5361fc3adb5b7138da78750b0d535a8252 |
| Linux/Linuxgeneric | 4.2 | Not reported |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 10, 2026
In the Linux kernel, the following vulnerability has been resolved: vmxnet3: fix BUG_ON in vmxnet3_get_hdr_len() for Geneve packets vmxnet3_get_hdr_len() assumes gdesc->rcd.v4/v6/tcp always describe the outer header, but for a Geneve-encapsulated packet the device can set them based on the inner header instead, signalled by the VMXNET3_RCD_HDR_INNER_SHIFT bit in the completion descriptor. Since the function never skips the outer encapsulation, this mismatch triggers: - BUG_ON(hdr.ipv4->protocol != IPPROTO_TCP), because the outer protocol is UDP (Geneve), not TCP. - BUG_ON(hdr.eth->h_proto != ...), when the tunnel's outer and inner IP versions differ (e.g. outer IPv6/inner IPv4 or vice versa). Check VMXNET3_RCD_HDR_INNER_SHIFT up front and bail out, since the function cannot locate the inner header it would need to parse. Also convert the remaining BUG_ON()s in this function to return 0 defensively.
Quoted source text, attributed separately from HOL analysis.