Categories
CVE-2026-23278 high CVSS 7.8

Vulnerability in Linux kernel (CVE-2026-23278)

Summary

Vulnerability in Linux kernel (CVE-2026-23278). Successful exploitation can lead to full system takeover.

Original description

The description as published by the source.

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: NIST National Vulnerability Database NVD GitHub Advisory

AI summary

Written by an external AI model and may contain mistakes. Check the original description and references below before acting on it.

Linuxカーネルのnetfilter nf_tablesにおいて、複数のキャッチオール要素の処理が行われない欠陥が修正されました。これにより警告が発生し、システムが不安定になる可能性があります。

❓ What is the problem

Linuxカーネルのnetfilter nf_tablesにおける、トランザクション処理中のキャッチオール要素の不適切な処理による警告。

📍 Affected scope

Linuxカーネルのnetfilter nf_tables

🔥 Severity

システムに警告が発生し、不安定になる可能性がある。

🔧 How to fix

全てのキャッチオール要素を適切にトグルする修正が行われている。

🛡️ Workaround

情報なし

🔍 Detection

パッチ済みのカーネルバージョンを使用しているか確認する。

Affected packages

Linux Kernel
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.177"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.144"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.4.0"},{"fixed":"6.12.78"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.18.19"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.19.9"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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