Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-23278— netfilter: nf_tables: always walk all pending catchall elements

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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于nf_tables未遍历所有待处理的catchall元素，可能导致集合销毁时访问已释放数据。

CVSS 7.8 · High EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 25

VendorProduct Version RangeStatus
Linux Linux d60be2da67d172aecf866302c91ea11533eca4d9< c4d4e86fda707d89eaba80e343321737375f8582 affected
628bd3e49cba1c066228e23d71a852c23e26da73< 4830fb44d12f586f3f544609e086933649a9175a affected
628bd3e49cba1c066228e23d71a852c23e26da73< eb0948fa13298212c5f8b30ee48efdae4389ab09 affected
628bd3e49cba1c066228e23d71a852c23e26da73< de47a88c6b807910f05703fb6605f7efdaa11417 affected
628bd3e49cba1c066228e23d71a852c23e26da73< 77c26b5056d693ffe5e9f040e946251cdb55ae55 affected
628bd3e49cba1c066228e23d71a852c23e26da73< 7cb9a23d7ae40a702577d3d8bacb7026f04ac2a9 affected
bc9f791d2593f17e39f87c6e2b3a36549a3705b1 affected
3c7ec098e3b588434a8b07ea9b5b36f04cef1f50 affected
… +17 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-23278

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
netfilter: nf_tables: always walk all pending catchall elements
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: always walk all pending catchall elements During transaction processing we might have more than one catchall element: 1 live catchall element and 1 pending element that is coming as part of the new batch. If the map holding the catchall elements is also going away, its required to toggle all catchall elements and not just the first viable candidate. Otherwise, we get: WARNING: ./include/net/netfilter/nf_tables.h:1281 at nft_data_release+0xb7/0xe0 [nf_tables], CPU#2: nft/1404 RIP: 0010:nft_data_release+0xb7/0xe0 [nf_tables] [..] __nft_set_elem_destroy+0x106/0x380 [nf_tables] nf_tables_abort_release+0x348/0x8d0 [nf_tables] nf_tables_abort+0xcf2/0x3ac0 [nf_tables] nfnetlink_rcv_batch+0x9c9/0x20e0 [..]
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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于nf_tables未遍历所有待处理的catchall元素，可能导致集合销毁时访问已释放数据。
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 d60be2da67d172aecf866302c91ea11533eca4d9 ~ c4d4e86fda707d89eaba80e343321737375f8582 -
Linux Linux 6.4 -

II. Public POCs for CVE-2026-23278

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-23278

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-23278 (6)

Same Patch Batch · Linux · 2026-03-20 · 8 CVEs total

CVE-2026-23275 7.8 HIGH io_uring: ensure ctx->rings is stable for task work flags manipulation
CVE-2026-23274 7.8 HIGH netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels
CVE-2026-23273 7.8 HIGH macvlan: observe an RCU grace period in macvlan_common_newlink() error path
CVE-2026-23272 7.8 HIGH netfilter: nf_tables: unconditionally bump set->nelems before insertion
CVE-2026-23271 7.8 HIGH perf: Fix __perf_event_overflow() vs perf_remove_from_context() race
CVE-2026-23276 net: add xmit recursion limit to tunnel xmit functions
CVE-2026-23277 net/sched: teql: fix NULL pointer dereference in iptunnel_xmit on TEQL slave xmit

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23278

No comments yet

Leave a comment