Answer in brief
CVE-2026-68411 records a Unknown severity vulnerability in wifi: mac80211_hwsim: clamp virtio RX length before skb_put. 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 | >=5d44fe7c9808c56e136e59147bd932f5491520f1 <82c5a30a66e2a7337d99476c67d6fc1a99c4250e || >=5d44fe7c9808c56e136e59147bd932f5491520f1 <fade308845c89f784da8a6780c1e77258488f1b6 || >=5d44fe7c9808c56e136e59147bd932f5491520f1 <6dc76371a9a360c29de00df5b11563102d9d675a || >=5d44fe7c9808c56e136e59147bd932f5491520f1 <99dc05c75acc3c8cde8d89c5371f4b569de5ac62 || >=5d44fe7c9808c56e136e59147bd932f5491520f1 <10a2b430f8f06ae14b9590b6f6faa6b588ef0654 | 82c5a30a66e2a7337d99476c67d6fc1a99c4250e, fade308845c89f784da8a6780c1e77258488f1b6, 6dc76371a9a360c29de00df5b11563102d9d675a, 99dc05c75acc3c8cde8d89c5371f4b569de5ac62, 10a2b430f8f06ae14b9590b6f6faa6b588ef0654 |
| Linux/Linuxgeneric | 5.7 | 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: wifi: mac80211_hwsim: clamp virtio RX length before skb_put hwsim_virtio_rx_work() passes the virtqueue used-ring length reported by the device straight to skb_put() on a fixed-size receive skb. A backend reporting a length larger than the skb tailroom drives skb_put() past the buffer end and hits skb_over_panic() -- a host-triggerable guest panic (denial of service). Clamp the length to the skb's available room before skb_put(). A conforming device never reports more than the posted buffer size, so valid frames are unaffected; a truncated over-report then fails the length/header checks in hwsim_virtio_handle_cmd() and is dropped, so truncating rather than dropping here cannot be turned into a parsing problem.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-68411 records a Unknown severity vulnerability in wifi: mac80211_hwsim: clamp virtio RX length before skb_put. 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 | >=5d44fe7c9808c56e136e59147bd932f5491520f1 <82c5a30a66e2a7337d99476c67d6fc1a99c4250e || >=5d44fe7c9808c56e136e59147bd932f5491520f1 <fade308845c89f784da8a6780c1e77258488f1b6 || >=5d44fe7c9808c56e136e59147bd932f5491520f1 <6dc76371a9a360c29de00df5b11563102d9d675a || >=5d44fe7c9808c56e136e59147bd932f5491520f1 <99dc05c75acc3c8cde8d89c5371f4b569de5ac62 || >=5d44fe7c9808c56e136e59147bd932f5491520f1 <10a2b430f8f06ae14b9590b6f6faa6b588ef0654 | 82c5a30a66e2a7337d99476c67d6fc1a99c4250e, fade308845c89f784da8a6780c1e77258488f1b6, 6dc76371a9a360c29de00df5b11563102d9d675a, 99dc05c75acc3c8cde8d89c5371f4b569de5ac62, 10a2b430f8f06ae14b9590b6f6faa6b588ef0654 |
| Linux/Linuxgeneric | 5.7 | 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: wifi: mac80211_hwsim: clamp virtio RX length before skb_put hwsim_virtio_rx_work() passes the virtqueue used-ring length reported by the device straight to skb_put() on a fixed-size receive skb. A backend reporting a length larger than the skb tailroom drives skb_put() past the buffer end and hits skb_over_panic() -- a host-triggerable guest panic (denial of service). Clamp the length to the skb's available room before skb_put(). A conforming device never reports more than the posted buffer size, so valid frames are unaffected; a truncated over-report then fails the length/header checks in hwsim_virtio_handle_cmd() and is dropped, so truncating rather than dropping here cannot be turned into a parsing problem.
Quoted source text, attributed separately from HOL analysis.