CVE-2026-23278 Affecting linux-6.1 package, versions <6.1.177-1~deb11u1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.22% (13th percentile)

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  • Snyk IDSNYK-DEBIAN11-LINUX61-18319872
  • published26 Jul 2026
  • disclosed20 Mar 2026

Introduced: 20 Mar 2026

CVE-2026-23278  (opens in a new tab)

How to fix?

Upgrade Debian:11 linux-6.1 to version 6.1.177-1~deb11u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-6.1 package and not the linux-6.1 package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

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 [..]

CVSS Base Scores

version 3.1