What is CVE-2026-23278?

CVE-2026-23278 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2026-03-20.

How severe is CVE-2026-23278?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Linux

CVE-2026-23278

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 [..]

EPSS: 0.002 (6.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 6.3.10, 6.1.36, 6.6.144
Linux Linux_kernel — versions 7.0

References

Frequently asked questions

What is CVE-2026-23278?: CVE-2026-23278 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2026-03-20.
How severe is CVE-2026-23278?: High severity. CVSS v3 base score is 7.8 out of 10.