Read the docs
TI-2026-18715 Aliases CVE-2026-23278GHSA-5vxp-pqjj-287g

netfilter: nf_tables: always walk all pending catchall elements

Priority LOW 35CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

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 [..]

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00225 13th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.15.224, 6.1.177, 4.20 +8Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux5.15.121 to before 5.15.224; 6.1.36 to before 6.1.177; 4.19.316 to before 4.20; 5.4.262 to before 5.5; 5.10.188 to before 5.11; 6.3.10 to before 6.45.15.224, 6.1.177, 4.20, 5.5, 5.11, 6.4Patch availableCNA
LinuxLinux6.4 and later5.15.224, 6.1.177, 6.6.144, 6.12.78, 6.18.19, 6.19.9, 7.0Patch availableCNA
  • Linux VendorLinux Affected 5.15.121 to before 5.15.224; 6.1.36 to before 6.1.177; 4.19.316 to before 4.20; 5.4.262 to before 5.5; 5.10.188 to before 5.11; 6.3.10 to before 6.4 Fixed in 5.15.224, 6.1.177, 4.20, 5.5, 5.11, 6.4 Patch available CNA
  • Linux VendorLinux Affected 6.4 and later Fixed in 5.15.224, 6.1.177, 6.6.144, 6.12.78, 6.18.19, 6.19.9, 7.0 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.19.316 to before 4.20; 5.4.262 to before 5.5; 5.10.188 to before 5.11; 5.15.121 to before 5.16; 6.1.36 to before 6.2; 6.3.10 to before 6.4; 6.4.1 to before 6.12.78; 6.13 to before 6.18.19; 6.19 to before 6.19.9VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*7.0 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*7.0 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*7.0 rc3VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.19.316 to before 4.20; 5.4.262 to before 5.5; 5.10.188 to before 5.11; 5.15.121 to before 5.16; 6.1.36 to before 6.2; 6.3.10 to before 6.4; 6.4.1 to before 6.12.78; 6.13 to before 6.18.19; 6.19 to before 6.19.9 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* Versions 7.0 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* Versions 7.0 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* Versions 7.0 rc3 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.15.224, 6.1.177, 4.20, 5.5, 5.11, 6.4
  • Fix · CNA Linux (Linux) Fixed in 5.15.224, 6.1.177, 6.6.144, 6.12.78, 6.18.19, 6.19.9, 7.0

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-23278
  2. 2026-10-03 Alias added: GHSA-5vxp-pqjj-287g
  3. 2026-10-16 CISA SSVC decision points changed
  4. 2026-10-19 Weakness changed · CISA ADP
  5. 2026-10-30 Fix available: Linux/[email protected], Linux/Linux@ae8f3cedc5f5653a5bed45c5ed016fe156e2af55 · CNA
  6. 2026-10-30 1 new reference · CNA

References

Patch 4

Other 3

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences