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TI-2026-45424 Aliases CVE-2026-63858GHSA-w348-qxhm-w5rx

netfilter: nf_tables: add hook transactions for device deletions

Priority LOW 35CWE-362Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
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.

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: add hook transactions for device deletions Restore the flag that indicates that the hook is going away, ie. NFT_HOOK_REMOVE, but add a new transaction object to track deletion of hooks without altering the basechain/flowtable hook_list during the preparation phase. The existing approach that moves the hook from the basechain/flowtable hook_list to transaction hook_list breaks netlink dump path readers of this RCU-protected list. It should be possible use an array for nft_trans_hook to store the deleted hooks to compact the representation but I am not expecting many hook object, specially now that wildcard support for devices is in place. Note that the nft_trans_chain_hooks() list contains a list of struct nft_trans_hook objects for DELCHAIN and DELFLOWTABLE commands, while this list stores struct nft_hook objects for NEWCHAIN and NEWFLOWTABLE. Note that new commands can be updated to use nft_trans_hook for consistency. This patch also adapts the event notification path to deal with the list of hook transactions.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.001 0th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.11, 5.16, 5.18 +4Red 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
LinuxLinux5.10.122 to before 5.11; 5.15.47 to before 5.16; 5.17.15 to before 5.18; 5.18.4 to before 5.195.11, 5.16, 5.18, 5.19Patch availableCNA
LinuxLinux5.19 and later6.18.57, 7.0.10, 7.1Patch availableCNA
  • Linux VendorLinux Affected 5.10.122 to before 5.11; 5.15.47 to before 5.16; 5.17.15 to before 5.18; 5.18.4 to before 5.19 Fixed in 5.11, 5.16, 5.18, 5.19 Patch available CNA
  • Linux VendorLinux Affected 5.19 and later Fixed in 6.18.57, 7.0.10, 7.1 Patch available CNA

CPE configurations NVD · 10

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*5.10.122 to before 5.11; 5.15.47 to before 5.16; 5.17.15 to before 5.18; 5.18.4 to before 5.19; 5.19.1 to before 6.18.57; 6.19 to before 7.0.10VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.19:-:*:*:*:*:*:*5.19VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*5.19 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*5.19 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:*5.19 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:*5.19 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.19:rc6:*:*:*:*:*:*5.19 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.19:rc7:*:*:*:*:*:*5.19 rc7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.19:rc8:*:*:*:*:*:*5.19 rc8VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*7.1 rc1VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.10.122 to before 5.11; 5.15.47 to before 5.16; 5.17.15 to before 5.18; 5.18.4 to before 5.19; 5.19.1 to before 6.18.57; 6.19 to before 7.0.10 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.19:-:*:*:*:*:*:* Versions 5.19 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:* Versions 5.19 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:* Versions 5.19 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:* Versions 5.19 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:* Versions 5.19 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.19:rc6:*:*:*:*:*:* Versions 5.19 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.19:rc7:*:*:*:*:*:* Versions 5.19 rc7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.19:rc8:*:*:*:*:*:* Versions 5.19 rc8 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* Versions 7.1 rc1 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.11, 5.16, 5.18, 5.19
  • Fix · CNA Linux (Linux) Fixed in 6.18.57, 7.0.10, 7.1

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-2026-63858
  2. 2026-10-03 Alias added: GHSA-w348-qxhm-w5rx
  3. 2026-10-16 Fix available: Linux/[email protected], Linux/Linux@768daa9f4276be4007e88dea61a378c8582ba008 · CNA
  4. 2026-10-16 1 new reference · CNA
  5. 2026-10-16 CISA SSVC decision points changed
  6. 2026-10-19 Weakness changed · CISA ADP
  7. 2026-10-26 Weakness changed · NVD

References

Patch 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