Answer in brief
CVE-2026-64189 records a Unknown severity vulnerability in netfilter: ipset: fix race between dump and ip_set_list resize. 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-2026-64189 records a Unknown severity vulnerability in netfilter: ipset: fix race between dump and ip_set_list resize. 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 | >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <a7a299277959683204d73333c32c092fd69327d4 || >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <1bc67c3fc98e9fc07032cc56afcdbc690c47d11e || >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <e8a9976b61f1bc4aa7fd25fa26726dfdf2adf710 || >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <96fbafc20ebd9a613736c2998b89c539fe3042f5 || >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <ff86ea9b7fdf70564e60436fbee68c96bc459943 || >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <81d54c766337b923eec26da0a13406760b091093 || >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <e8ee198bbc04a32d336e79160fde980e0235b39f || >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <7cd9103283b26b917360ec99d7d2f2d761bcf1ab || 2f6bf7917f55f9dae913193e49672b3598620eab || >=4.19.5 <4.20 | a7a299277959683204d73333c32c092fd69327d4, 1bc67c3fc98e9fc07032cc56afcdbc690c47d11e, e8a9976b61f1bc4aa7fd25fa26726dfdf2adf710, 96fbafc20ebd9a613736c2998b89c539fe3042f5, ff86ea9b7fdf70564e60436fbee68c96bc459943, 81d54c766337b923eec26da0a13406760b091093, e8ee198bbc04a32d336e79160fde980e0235b39f, 7cd9103283b26b917360ec99d7d2f2d761bcf1ab, 4.20 |
| Linux/Linuxgeneric | 4.20 | Not reported |
Published upstream
Jul 20, 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: ipset: fix race between dump and ip_set_list resize The release path of ip_set_dump_do() and ip_set_dump_done() read inst->ip_set_list via ip_set_ref_netlink(), a plain rcu_dereference_raw() of the array pointer. These run from netlink_recvmsg() without the nfnl mutex and without an RCU read-side critical section. A concurrent ip_set_create() can grow the array: it publishes the new array, calls synchronize_net() and then kvfree()s the old one. Since the dump paths read the array outside any RCU reader, synchronize_net() does not wait for them and the old array can be freed while they still index into it, causing a use-after-free. The dumped set itself stays pinned via set->ref_netlink, so only the array load needs protecting. Take rcu_read_lock() around it, matching ip_set_get_byname() and __ip_set_put_byindex(). BUG: KASAN: slab-use-after-free in ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697) Read of size 8 at addr ffff88800b5c4018 by task exploit/150 Call Trace: ... kasan_report (mm/kasan/report.c:595) ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697) netlink_dump (net/netlink/af_netlink.c:2325) netlink_recvmsg (net/netlink/af_netlink.c:1976) sock_recvmsg (net/socket.c:1159) __sys_recvfrom (net/socket.c:2315) ... Oops: general protection fault, probably for non-canonical address ... KASAN NOPTI KASAN: maybe wild-memory-access in range [0x02d6...d0-0x02d6...d7] RIP: 0010:ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1698) Kernel panic - not syncing: Fatal exception
Quoted source text, attributed separately from HOL analysis.
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 | >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <a7a299277959683204d73333c32c092fd69327d4 || >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <1bc67c3fc98e9fc07032cc56afcdbc690c47d11e || >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <e8a9976b61f1bc4aa7fd25fa26726dfdf2adf710 || >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <96fbafc20ebd9a613736c2998b89c539fe3042f5 || >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <ff86ea9b7fdf70564e60436fbee68c96bc459943 || >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <81d54c766337b923eec26da0a13406760b091093 || >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <e8ee198bbc04a32d336e79160fde980e0235b39f || >=8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 <7cd9103283b26b917360ec99d7d2f2d761bcf1ab || 2f6bf7917f55f9dae913193e49672b3598620eab || >=4.19.5 <4.20 | a7a299277959683204d73333c32c092fd69327d4, 1bc67c3fc98e9fc07032cc56afcdbc690c47d11e, e8a9976b61f1bc4aa7fd25fa26726dfdf2adf710, 96fbafc20ebd9a613736c2998b89c539fe3042f5, ff86ea9b7fdf70564e60436fbee68c96bc459943, 81d54c766337b923eec26da0a13406760b091093, e8ee198bbc04a32d336e79160fde980e0235b39f, 7cd9103283b26b917360ec99d7d2f2d761bcf1ab, 4.20 |
| Linux/Linuxgeneric | 4.20 | Not reported |
Published upstream
Jul 20, 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: ipset: fix race between dump and ip_set_list resize The release path of ip_set_dump_do() and ip_set_dump_done() read inst->ip_set_list via ip_set_ref_netlink(), a plain rcu_dereference_raw() of the array pointer. These run from netlink_recvmsg() without the nfnl mutex and without an RCU read-side critical section. A concurrent ip_set_create() can grow the array: it publishes the new array, calls synchronize_net() and then kvfree()s the old one. Since the dump paths read the array outside any RCU reader, synchronize_net() does not wait for them and the old array can be freed while they still index into it, causing a use-after-free. The dumped set itself stays pinned via set->ref_netlink, so only the array load needs protecting. Take rcu_read_lock() around it, matching ip_set_get_byname() and __ip_set_put_byindex(). BUG: KASAN: slab-use-after-free in ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697) Read of size 8 at addr ffff88800b5c4018 by task exploit/150 Call Trace: ... kasan_report (mm/kasan/report.c:595) ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697) netlink_dump (net/netlink/af_netlink.c:2325) netlink_recvmsg (net/netlink/af_netlink.c:1976) sock_recvmsg (net/socket.c:1159) __sys_recvfrom (net/socket.c:2315) ... Oops: general protection fault, probably for non-canonical address ... KASAN NOPTI KASAN: maybe wild-memory-access in range [0x02d6...d0-0x02d6...d7] RIP: 0010:ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1698) Kernel panic - not syncing: Fatal exception
Quoted source text, attributed separately from HOL analysis.