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CVE-2026-72435— netfilter: ipset: fix order of kfree_rcu() and rcu_assign_pointer()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 4.2版本存在安全漏洞，该漏洞源于netfilter: ipset在处理comment extension时，kfree_rcu()与rcu_assign_pointer()调用顺序错误，可能导致释放后重用。

CVSS 7.8 · High EPSS 0.17% · P6

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux b57b2d1fa53fe8563bdfc66a33b844463b9af285< c9787d7c24ffd83019f379455e1b97fb4f0f75eb affected
b57b2d1fa53fe8563bdfc66a33b844463b9af285< 6e98407cb94e035bba98956adc9096a76d8b2a9f affected
b57b2d1fa53fe8563bdfc66a33b844463b9af285< 50b70f56f3baaff46599f59b2d93fa2540120776 affected
b57b2d1fa53fe8563bdfc66a33b844463b9af285< d01b4b471f0fc5c396af62845e972ccf99cee29a affected
b57b2d1fa53fe8563bdfc66a33b844463b9af285< fcb565966534909377a16be5f7b065db2e25c8b5 affected
b57b2d1fa53fe8563bdfc66a33b844463b9af285< 8087bb360a936a6314d22b567e4b861656943eb6 affected
b57b2d1fa53fe8563bdfc66a33b844463b9af285< 93a775fd67f3ef34949a9523bfa69403ee74efdd affected
b57b2d1fa53fe8563bdfc66a33b844463b9af285< 3ca9982a8882470aa0ac4e8bb9a552b181d1efcd affected
… +10 more rows
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I. Basic Information for CVE-2026-72435

Vulnerability Information
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Vulnerability Title
netfilter: ipset: fix order of kfree_rcu() and rcu_assign_pointer()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: fix order of kfree_rcu() and rcu_assign_pointer() Sashiko pointed out that kfree_rcu() was called before rcu_assign_pointer() in handling the comment extension. Fix the order so that rcu_assign_pointer() called first.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 4.2版本存在安全漏洞，该漏洞源于netfilter: ipset在处理comment extension时，kfree_rcu()与rcu_assign_pointer()调用顺序错误，可能导致释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux b57b2d1fa53fe8563bdfc66a33b844463b9af285 ~ c9787d7c24ffd83019f379455e1b97fb4f0f75eb -
Linux Linux 4.2 -

II. Public POCs for CVE-2026-72435

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III. Intelligence Information for CVE-2026-72435

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Patches & Fixes for CVE-2026-72435 (8)

Same Patch Batch · Linux · 2026-08-15 · 844 CVEs total

CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72319 9.8 CRITICAL ipvs: ensure inner headers in ICMP errors are in headroom
CVE-2026-72220 9.8 CRITICAL sunrpc: harden rq_procinfo lifecycle to prevent double-free
CVE-2026-72217 9.8 CRITICAL SUNRPC: Bound-check xdr_buf_to_bvec() stores before writing
CVE-2026-74384 9.8 CRITICAL nvme-multipath: fix flex array size in struct nvme_ns_head
CVE-2026-72299 9.8 CRITICAL tipc: restrict socket queue dumps in enqueue tracepoints
CVE-2026-72210 9.8 CRITICAL ntfs: fix off-by-one in mapping pairs decoding bounds checks
CVE-2026-72211 9.8 CRITICAL ntfs: grow index root value before reparent header update
CVE-2026-72317 9.8 CRITICAL SUNRPC: pin upper rpc_clnt across the TLS connect_worker
CVE-2026-72209 9.8 CRITICAL ntfs: validate attribute values on lookup
CVE-2026-74268 9.8 CRITICAL tcp: clear sock_ops cb flags before force-closing a child socket
CVE-2026-72207 9.8 CRITICAL ntfs: not change 0-byte $DATA attribute to non-resident
CVE-2026-74267 9.8 CRITICAL net/sched: sch_codel: Do not call qdisc_tree_reduce_backlog during peek before restoring q

Showing top 20 of 844 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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