Answer in brief
CVE-2026-63858 records a Unknown severity vulnerability in netfilter: nf_tables: add hook transactions for device deletions. 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 | >=b6d9014a3335194590abdd2a2471ef5147a67645 <4e69bfb32b2db323d9205fdb30e284481b37817c || >=b6d9014a3335194590abdd2a2471ef5147a67645 <10f79dbd7719d1da9f5884d13060322d8729f091 || 7a248f9c74f9f62799718c12efd9e9e391d60b6f || f275989ad04159dbfc62cefb65ba9c5ba1d7c34f || 62d91062058b42bf70b2c3446aec397bb0ce15ee || 99180dec5ae582227219d1fdd0dd5ccf53ec7491 || >=5.10.122 <5.11 || >=5.15.47 <5.16 || >=5.17.15 <5.18 || >=5.18.4 <5.19 | 4e69bfb32b2db323d9205fdb30e284481b37817c, 10f79dbd7719d1da9f5884d13060322d8729f091, 5.11, 5.16, 5.18, 5.19 |
| Linux/Linuxgeneric | 5.19 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: add hook transactions for device deletions Restore the flag that indicates that the hook is going away, ie. NFT_HOOK_REMOVE, but add a new transaction object to track deletion of hooks without altering the basechain/flowtable hook_list during the preparation phase. The existing approach that moves the hook from the basechain/flowtable hook_list to transaction hook_list breaks netlink dump path readers of this RCU-protected list. It should be possible use an array for nft_trans_hook to store the deleted hooks to compact the representation but I am not expecting many hook object, specially now that wildcard support for devices is in place. Note that the nft_trans_chain_hooks() list contains a list of struct nft_trans_hook objects for DELCHAIN and DELFLOWTABLE commands, while this list stores struct nft_hook objects for NEWCHAIN and NEWFLOWTABLE. Note that new commands can be updated to use nft_trans_hook for consistency. This patch also adapts the event notification path to deal with the list of hook transactions.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-63858 records a Unknown severity vulnerability in netfilter: nf_tables: add hook transactions for device deletions. 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 | >=b6d9014a3335194590abdd2a2471ef5147a67645 <4e69bfb32b2db323d9205fdb30e284481b37817c || >=b6d9014a3335194590abdd2a2471ef5147a67645 <10f79dbd7719d1da9f5884d13060322d8729f091 || 7a248f9c74f9f62799718c12efd9e9e391d60b6f || f275989ad04159dbfc62cefb65ba9c5ba1d7c34f || 62d91062058b42bf70b2c3446aec397bb0ce15ee || 99180dec5ae582227219d1fdd0dd5ccf53ec7491 || >=5.10.122 <5.11 || >=5.15.47 <5.16 || >=5.17.15 <5.18 || >=5.18.4 <5.19 | 4e69bfb32b2db323d9205fdb30e284481b37817c, 10f79dbd7719d1da9f5884d13060322d8729f091, 5.11, 5.16, 5.18, 5.19 |
| Linux/Linuxgeneric | 5.19 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: add hook transactions for device deletions Restore the flag that indicates that the hook is going away, ie. NFT_HOOK_REMOVE, but add a new transaction object to track deletion of hooks without altering the basechain/flowtable hook_list during the preparation phase. The existing approach that moves the hook from the basechain/flowtable hook_list to transaction hook_list breaks netlink dump path readers of this RCU-protected list. It should be possible use an array for nft_trans_hook to store the deleted hooks to compact the representation but I am not expecting many hook object, specially now that wildcard support for devices is in place. Note that the nft_trans_chain_hooks() list contains a list of struct nft_trans_hook objects for DELCHAIN and DELFLOWTABLE commands, while this list stores struct nft_hook objects for NEWCHAIN and NEWFLOWTABLE. Note that new commands can be updated to use nft_trans_hook for consistency. This patch also adapts the event notification path to deal with the list of hook transactions.
Quoted source text, attributed separately from HOL analysis.