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CVE-2026-72436— netfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types

CVSS 9.8 · Critical EPSS 0.71% · P51

Affected Version Matrix 14

VendorProductVersion RangeStatus
LinuxLinux18f84d41d34fa35d0d64bbaea01fe664553ecc06< c107233d2ff4fd7cef5d02f9124b99194957a710affected
18f84d41d34fa35d0d64bbaea01fe664553ecc06< 6329d3a9afe715fddda0460cfa46b496d61c2fe0affected
18f84d41d34fa35d0d64bbaea01fe664553ecc06< 7445fe965b7d8756070a40e80f8b73348ccda1d7affected
18f84d41d34fa35d0d64bbaea01fe664553ecc06< c4d257734e91bfcdc71d41843392dd6400b5bb1baffected
18f84d41d34fa35d0d64bbaea01fe664553ecc06< 3219d74e4536658c937fd878a327257b86ce80ddaffected
18f84d41d34fa35d0d64bbaea01fe664553ecc06< e4b4984e28c16406ecb318444dea4a8bf47def3eaffected
4.2affected
< 4.2unaffected
… +6 more rows
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I. Basic Information for CVE-2026-72436

Vulnerability Information
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Vulnerability Title
netfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types Sashiko pointed out that there are a few lockless RCU readers using test_bit() which is a relaxed atomic operation and provides no memory barrier guarantees. Use test_bit_acquire() instead where the operation may run parallel with add/del/gc, i.e. is not one from the next cases - protected by region lock - in a set destroy phase - in a new/temporary set creation phase
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/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

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 18f84d41d34fa35d0d64bbaea01fe664553ecc06 ~ c107233d2ff4fd7cef5d02f9124b99194957a710 -
LinuxLinux 4.2 -

II. Public POCs for CVE-2026-72436

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III. Intelligence Information for CVE-2026-72436

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Patches & Fixes for CVE-2026-72436 (6)

Same Patch Batch · Linux · 2026-08-15 · 846 CVEs total

CVE-2026-7428010.0 CRITICALcrypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-7240710.0 CRITICALgeneve: validate inner network offset in geneve_gro_complete()
CVE-2026-7427910.0 CRITICALcrypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-7240810.0 CRITICALgeneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-7430910.0 CRITICALvdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-7447510.0 CRITICALvxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-7242110.0 CRITICALipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-724939.9 CRITICALnet: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-724669.8 CRITICALxprtrdma: Fix bcall rep leak and unbounded peek
CVE-2026-722499.8 CRITICALnetfilter: flowtable: use dst in this direction when pushing IPIP header
CVE-2026-722489.8 CRITICALnetfilter: flowtable: support IPIP tunnel with direct xmit
CVE-2026-723819.8 CRITICALksmbd: fix use-after-free of fp->owner.name in durable handle owner check
CVE-2026-724779.8 CRITICALfs/ntfs3: call _ntfs_bad_inode() when failing to rename
CVE-2026-724739.8 CRITICALxprtrdma: Decouple req recycling from RPC completion
CVE-2026-721309.8 CRITICALnvmet-auth: reject short AUTH_RECEIVE buffers
CVE-2026-724519.8 CRITICALxfrm: Fix xfrm state cache insertion race
CVE-2026-743769.8 CRITICALmd/raid10: reset read_slot when reusing r10bio for discard
CVE-2026-722269.8 CRITICALbatman-adv: tt: prevent TVLV OOB check overflow
CVE-2026-744069.8 CRITICALvxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().
CVE-2026-721299.8 CRITICALnvmet-rdma: handle inline data with a nonzero offset

Showing top 20 of 846 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-72436

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