Answer in brief
CVE-2026-46323 records a High severity (CVSS 7.8) vulnerability in net: gro: don't merge zcopy skbs. 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.
Answer in brief
CVE-2026-46323 records a High severity (CVSS 7.8) vulnerability in net: gro: don't merge zcopy skbs. 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 7.8. 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 | >=753f1ca4e1e50248a1b760c9774d6d6b354562cc <3c6cc9f2ca65b6dd61b1af75452dc0e1cd0aad8d || >=753f1ca4e1e50248a1b760c9774d6d6b354562cc <1f9c828556416fbe3f49386708ce999fc4d4da06 || >=753f1ca4e1e50248a1b760c9774d6d6b354562cc <479084ae0e1d9cb7929cb4298d35623de189f80a || >=753f1ca4e1e50248a1b760c9774d6d6b354562cc <e334cbf3388fd9334503a778a82d9e9f14dd2f71 || >=753f1ca4e1e50248a1b760c9774d6d6b354562cc <44bea2032af0425e4ce6d26a8af0ede79db49ec1 || >=753f1ca4e1e50248a1b760c9774d6d6b354562cc <4db79a322db8c97f7b73b8a347395ef4d685eb40 | 3c6cc9f2ca65b6dd61b1af75452dc0e1cd0aad8d, 1f9c828556416fbe3f49386708ce999fc4d4da06, 479084ae0e1d9cb7929cb4298d35623de189f80a, e334cbf3388fd9334503a778a82d9e9f14dd2f71, 44bea2032af0425e4ce6d26a8af0ede79db49ec1, 4db79a322db8c97f7b73b8a347395ef4d685eb40 |
| Linux/Linuxgeneric | 6.0 | Not reported |
Published upstream
Jun 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: net: gro: don't merge zcopy skbs skb_gro_receive() can currently copy frags between the source and GRO skb, without checking the zerocopy status, and in particular the SKBFL_MANAGED_FRAG_REFS flag. When SKBFL_MANAGED_FRAG_REFS is set, the skb doesn't hold a reference on the pages in shinfo->frags. Appending those frags to another skb's frags without fixing up the page refcount can lead to UAF. When either the last skb in the GRO chain (the one we would append frags to) or the source skb is zerocopy, don't merge the skbs.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.8. 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 | >=753f1ca4e1e50248a1b760c9774d6d6b354562cc <3c6cc9f2ca65b6dd61b1af75452dc0e1cd0aad8d || >=753f1ca4e1e50248a1b760c9774d6d6b354562cc <1f9c828556416fbe3f49386708ce999fc4d4da06 || >=753f1ca4e1e50248a1b760c9774d6d6b354562cc <479084ae0e1d9cb7929cb4298d35623de189f80a || >=753f1ca4e1e50248a1b760c9774d6d6b354562cc <e334cbf3388fd9334503a778a82d9e9f14dd2f71 || >=753f1ca4e1e50248a1b760c9774d6d6b354562cc <44bea2032af0425e4ce6d26a8af0ede79db49ec1 || >=753f1ca4e1e50248a1b760c9774d6d6b354562cc <4db79a322db8c97f7b73b8a347395ef4d685eb40 | 3c6cc9f2ca65b6dd61b1af75452dc0e1cd0aad8d, 1f9c828556416fbe3f49386708ce999fc4d4da06, 479084ae0e1d9cb7929cb4298d35623de189f80a, e334cbf3388fd9334503a778a82d9e9f14dd2f71, 44bea2032af0425e4ce6d26a8af0ede79db49ec1, 4db79a322db8c97f7b73b8a347395ef4d685eb40 |
| Linux/Linuxgeneric | 6.0 | Not reported |
Published upstream
Jun 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: net: gro: don't merge zcopy skbs skb_gro_receive() can currently copy frags between the source and GRO skb, without checking the zerocopy status, and in particular the SKBFL_MANAGED_FRAG_REFS flag. When SKBFL_MANAGED_FRAG_REFS is set, the skb doesn't hold a reference on the pages in shinfo->frags. Appending those frags to another skb's frags without fixing up the page refcount can lead to UAF. When either the last skb in the GRO chain (the one we would append frags to) or the source skb is zerocopy, don't merge the skbs.
Quoted source text, attributed separately from HOL analysis.