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CVE-2026-98899— netfilter: ipset: mark the rcu locked areas properly

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.

在 Linux 内核中，以下漏洞已得到修复： netfilter: ipset：正确标记 RCU 锁定区域 当我们增加 uref 计数器时，无需保持 RCU 锁，因为被引用的哈希表不会消失。同样，在 mtype_gc 中，基于相同的原因，我们需要使用 RCU 锁而非自旋锁。

AI Predicted 5.5 Difficulty: Hard

Possible ATT&CK Techniques 1 AI

T1069 · Permission Groups Discovery

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 67bd3d2350d17c2f4fb158c3f917c10b15ecbc94 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 892399abd1a005a455d5b74d86d82b9773405f2b affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< eee5172741b2c0e73210020732043e5d589295d3 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< ecb48c6b9edc78de8dd456c365727ae14b88c1ee affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 0c46c9ce24130657ec7460c27fba5d445f5abd06 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< ca9fab1ca15534cef1630e81a479e94b3bbcdb6a affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 5d0c22e73656d050daffad10a2ba8765ce8441c8 affected
< 5.10.271 affected
… +12 more rows
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I. Basic Information for CVE-2026-98899

Vulnerability Information
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Vulnerability Title
netfilter: ipset: mark the rcu locked areas properly
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: mark the rcu locked areas properly When we bump the uref counter, there's no need to keep the rcu lock because the referred hash table can't disappear. Also, from the same reason in mtype_gc we need the rcu lock and not a spinlock.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 67bd3d2350d17c2f4fb158c3f917c10b15ecbc94 -
Linux Linux 5.10.271 ~ 5.10.* -

II. Public POCs for CVE-2026-98899

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III. Intelligence Information for CVE-2026-98899

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Patches & Fixes for CVE-2026-98899 (5)

Same Patch Batch · Linux · 2026-10-23 · 218 CVEs total

CVE-2026-98938 rust: irq: pass RegistrationInner as cookie to request_irq
CVE-2026-98951 riscv: ptrace: Zero-initialize regset buffers before copyin
CVE-2026-98950 flow_dissector: avoid u16 truncation of hlen in bpf_flow_dissect()
CVE-2026-98949 drm/imagination: Fix reference and vm_bo handling in remap()
CVE-2026-98948 mlxsw: spectrum_flower: Fix port range register leak in tmplt_create()
CVE-2026-98947 vsock: Fix memory leak in vmci_transport_recv_dgram_cb()
CVE-2026-98946 drm/vc4: Disable the V3D interrupt across runtime suspend
CVE-2026-98945 HID: steam: Rearrange teardown sequence
CVE-2026-98944 HID: steam: Refactor registration
CVE-2026-98943 HID: steam: Clean up locking
CVE-2026-98942 sched_ext: Build the cid tables privately and publish them with RCU
CVE-2026-98941 ext4: don't enable large folios on encrypted inodes
CVE-2026-98940 ASoC: qcom: lpass-cpu: use DAI table index for playback constraints
CVE-2026-98939 x86/mm: Drop unnecessary PMD page copy when freeing
CVE-2026-98927 KVM: arm64: nv: Fix life cycle of the nested_mmus array
CVE-2026-98930 KVM: s390: Fix IRQ injection with SIGP Stop and Store Status
CVE-2026-98929 macsec: initialize SecY before registering the netdevice
CVE-2026-98928 KVM: arm64: Derive GUEST_HAS_SVE from the SVE feature bit at EL2
CVE-2026-98931 mtd: spinand: fix NULL pointer dereference with no ECC engine
CVE-2026-98926 drm/amd/display: Remove sink usage from DPMS

Showing top 20 of 218 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98899

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