CVE-2026-23278

High

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 [..]

Package Linux Kernel
Published 2026-03-20
Last modified 2026-07-04
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

7.8

out of 10
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected versions

Linux kernel versions 6.1.36, 4.19.316, 5.4.262, 5.10.188, 5.15.121, 6.3.10, 6.4 and later are affected. Fixed in 6.1.177, 6.6.144, 6.12.78, 6.18.19, 6.19.9, 7.0 and their respective stable series.

Affected from
≥ 6.1.36 ≥ 4.19.316 ≥ 5.4.262 ≥ 5.10.188 ≥ 5.15.121 ≥ 6.3.10 ≥ 6.4
Fixed in
✓ 6.1.177 6.1.x ✓ 6.6.144 6.6.x ✓ 6.12.78 6.12.x ✓ 6.18.19 6.18.x ✓ 6.19.9 6.19.x ✓ 7.0

References

6 total
Showing 5 of 6 references View all on NVD

Frequently asked questions

  • What is CVE-2026-23278?

    CVE-2026-23278 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.1.36 onward and has been patched in 6.1.177, 6.6.144, 6.12.78 and others. CVE-2026-23278 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2026-23278?

    CVE-2026-23278 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2026-23278?

    Yes. CVE-2026-23278 has been patched. Fixed versions include 6.1.177, 6.6.144, 6.12.78 and others. If you are running Linux kernel 6.1.36 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2026-23278 actively exploited?

    No. CVE-2026-23278 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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