Answer in brief
CVE-2024-42109 records a High severity (CVSS 7.8) vulnerability in netfilter: nf_tables: unconditionally flush pending work before notifier. 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 | >=f22954f8c58fd5f5489f5980796914e306757e77 <3325628cb36b7f216c5716e7b5124d9dc81199e4 || >=41841b585e53babdfb0fa6fdfa54f6d7c28c1206 <4c06c13317b9a08decedcd7aaf706691e336277c || >=2c9f0293280e258606e54ed2b96fa71498432eae <55a40406aac555defe9bdd0adec9508116ce7cb1 || >=2c9f0293280e258606e54ed2b96fa71498432eae <09e650c3a3a7d804430260510534ccbf71c75b2e || >=2c9f0293280e258606e54ed2b96fa71498432eae <9f6958ba2e902f9820c594869bd710ba74b7c4c0 || 4167aa477abcf62b0dfda51f3513280fa73cd588 || >=5.15.129 <5.15.163 || >=6.1.50 <6.1.98 || >=6.4.13 <6.5 | 3325628cb36b7f216c5716e7b5124d9dc81199e4, 4c06c13317b9a08decedcd7aaf706691e336277c, 55a40406aac555defe9bdd0adec9508116ce7cb1, 09e650c3a3a7d804430260510534ccbf71c75b2e, 9f6958ba2e902f9820c594869bd710ba74b7c4c0, 5.15.163, 6.1.98, 6.5 |
| Linux/Linuxgeneric | 6.5 | Not reported |
Published upstream
Jul 30, 2024
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: unconditionally flush pending work before notifier syzbot reports: KASAN: slab-uaf in nft_ctx_update include/net/netfilter/nf_tables.h:1831 KASAN: slab-uaf in nft_commit_release net/netfilter/nf_tables_api.c:9530 KASAN: slab-uaf int nf_tables_trans_destroy_work+0x152b/0x1750 net/netfilter/nf_tables_api.c:9597 Read of size 2 at addr ffff88802b0051c4 by task kworker/1:1/45 [..] Workqueue: events nf_tables_trans_destroy_work Call Trace: nft_ctx_update include/net/netfilter/nf_tables.h:1831 [inline] nft_commit_release net/netfilter/nf_tables_api.c:9530 [inline] nf_tables_trans_destroy_work+0x152b/0x1750 net/netfilter/nf_tables_api.c:9597 Problem is that the notifier does a conditional flush, but its possible that the table-to-be-removed is still referenced by transactions being processed by the worker, so we need to flush unconditionally. We could make the flush_work depend on whether we found a table to delete in nf-next to avoid the flush for most cases. AFAICS this problem is only exposed in nf-next, with commit e169285f8c56 ("netfilter: nf_tables: do not store nft_ctx in transaction objects"), with this commit applied there is an unconditional fetch of table->family which is whats triggering the above splat.
Quoted source text, attributed separately from HOL analysis.