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CVE-2026-72418— Linux kernel 安全漏洞

CVSS 7.5 · High EPSS 0.72% · P51

Possible ATT&CK Techniques 1AI

T1498.002 · Reflection Amplification

Affected Version Matrix 26

ベンダープロダクトVersion Rangeステータス
LinuxLinux460c112e1d887b58b06b56e8e0230058906ff2c3< 000ac6830b56499d6b65fd91486ce6689eb02be4affected
53bc0ac47f4f7621c991807bc90e01df49561ac8< cbe2d14a7c5b1fc71821fbfee5c4963917411e92affected
ca8b4d1d6304a84ce2016fa2fe9a114b9607b839< 3793d24de224943e0a6016bbeffb6f5c4cea2e3daffected
8286c02fe9100330475331253fc590f047963f90< abef7f817217fcb62c11821d6b895063eadb2828affected
b29ddccf36946a90323486221f39e9f88cc01b8e< ebfe8249ba79e4ff0f1e3aad8787b992ef27f026affected
77ea3d8ac3d3d59b5ac9ad639e4ba107c0f2ff1e< 329f2626ee5cb8fafdf6b58b624311529c57cb45affected
69894e5b4c5e28cda5f32af33d4a92b7a4b93b0e< be52572c6d55f677ba76869d3c63805c0d4891a3affected
69894e5b4c5e28cda5f32af33d4a92b7a4b93b0e< c8b6f36f766991e3ebebec6596daee4b04dcbc49affected
… +18 more rows
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I. CVE-2026-72418の基本情報

脆弱性情報
脆弱性についてご質問がありますか？Shenlongの分析が参考になるかご確認ください！
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脆弱性タイトル
netfilter: nf_conncount: prevent connlimit drops for early confirmed ct
ソース: CVE Program / CVE List V5
脆弱性説明
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conncount: prevent connlimit drops for early confirmed ct Commit 69894e5b4c5e ("netfilter: nft_connlimit: update the count if add was skipped") introduced a regression where packets for valid connections are dropped when using connlimit for soft-limiting scenarios. The issue occurs when a new connection reuses a socket currently in the TIME_WAIT state. In this scenario, the connection tracking entry is evaluated as already confirmed. Previously, __nf_conncount_add() assumed that if a connection was confirmed and did not originate from the loopback interface, it should skip the addition and return -EEXIST. Skipping the addition triggers a garbage collection run that cleans up the TIME_WAIT connection. Consequently, the active connection count drops to 0, which xt_connlimit mishandles, leading to the false rejection of the perfectly valid new connection. Fix this by replacing the interface check with protocol-agnostic state checks. We now skip the tree insertion and preserve the lockless garbage collection optimization only if the connection is IPS_ASSURED. This allows early-confirmed setup packets (such as reused TIME_WAIT sockets or locally generated SYN-ACKs) to be properly evaluated and counted without falsely dropping. The goto check_connections path is maintained to ensure these setup packets are deduplicated correctly. This has been tested with slowhttptest and HTTP server configured locally to ensure we are not breaking soft-limiting scenarios for local or external connections. In addition, it was tested with a OVS zone limit too.
ソース: CVE Program / CVE List V5
CVSS情報
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
ソース: CVE Program / CVE List V5
脆弱性タイプ
N/A
ソース: CVE Program / CVE List V5
脆弱性タイトル
Linux kernel 安全漏洞
ソース: CNNVD (China National Vulnerability Database)
脆弱性説明
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于在connlimit软限制场景中，当新连接重用TIME_WAIT状态socket时连接计数处理不当，可能导致有效的网络连接被错误丢弃。
ソース: CNNVD (China National Vulnerability Database)
CVSS情報
N/A
ソース: CNNVD (China National Vulnerability Database)
脆弱性タイプ
N/A
ソース: CNNVD (China National Vulnerability Database)

影響を受ける製品

ベンダープロダクト影響を受けるバージョンCPE購読
LinuxLinux 460c112e1d887b58b06b56e8e0230058906ff2c3 ~ 000ac6830b56499d6b65fd91486ce6689eb02be4 -
LinuxLinux 6.19 -

II. CVE-2026-72418の公開POC

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III. CVE-2026-72418のインテリジェンス情報

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CVE-2026-72418 补丁与修复 (7)

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-2026-7240810.0 CRITICALgeneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-7427910.0 CRITICALcrypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-7447510.0 CRITICALvxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-7430910.0 CRITICALvdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
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-2026-724639.8 CRITICALxfrm: Fix dev use-after-free in xfrm async resumption
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-2026-724729.8 CRITICALnfs: use nfsi->rwsem to protect traversal of the file lock list
CVE-2026-744069.8 CRITICALvxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().
CVE-2026-722219.8 CRITICALsunrpc: wait for in-flight TLS handshake callback when cancel loses race
CVE-2026-721379.8 CRITICALxfrm: nat_keepalive: avoid double free on send error
CVE-2026-743769.8 CRITICALmd/raid10: reset read_slot when reusing r10bio for discard
CVE-2026-744019.8 CRITICALdlm: fix add msg handle in send_queue ordered
CVE-2026-722349.8 CRITICALbatman-adv: access unicast_ttvn skb->data only after skb realloc

Showing 20 of 846 CVEs. View all on vendor page →

IV. 関連脆弱性

同じ製品: Linux
同じベンダー: Linux

V. CVE-2026-72418へのコメント

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