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TI-2023-29854 Aliases CVE-2023-53566GHSA-pcw3-hvmm-479h

netfilter: nft_set_rbtree: fix null deref on element insertion

Priority LOW 35CWE-476Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 3 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_rbtree: fix null deref on element insertion There is no guarantee that rb_prev() will not return NULL in nft_rbtree_gc_elem(): general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] nft_add_set_elem+0x14b0/0x2990 nf_tables_newsetelem+0x528/0xb30 Furthermore, there is a possible use-after-free while iterating, 'node' can be free'd so we need to cache the next value to use.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00152 4th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.181, 5.15.113, 6.1.30 +2Red Hat: 2 advisoriesRed Hat: 3 fixed, 1 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
LinuxLinux5.10.166 to before 5.10.181; 5.15.91 to before 5.15.113; 6.1.9 to before 6.1.305.10.181, 5.15.113, 6.1.30Patch availableCNA
LinuxLinux6.2 and later5.10.181, 5.15.113, 6.1.30, 6.3.4, 6.4Patch availableCNA
  • Linux VendorLinux Affected 5.10.166 to before 5.10.181; 5.15.91 to before 5.15.113; 6.1.9 to before 6.1.30 Fixed in 5.10.181, 5.15.113, 6.1.30 Patch available CNA
  • Linux VendorLinux Affected 6.2 and later Fixed in 5.10.181, 5.15.113, 6.1.30, 6.3.4, 6.4 Patch available CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*5.10.166 to before 5.10.181; 5.15.91 to before 5.15.113; 6.1.9 to before 6.1.30; 6.2.1 to before 6.3.4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.2:-:*:*:*:*:*:*6.2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.2:rc6:*:*:*:*:*:*6.2 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.2:rc7:*:*:*:*:*:*6.2 rc7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.2:rc8:*:*:*:*:*:*6.2 rc8VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:*6.4 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.4:rc2:*:*:*:*:*:*6.4 rc2VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.10.166 to before 5.10.181; 5.15.91 to before 5.15.113; 6.1.9 to before 6.1.30; 6.2.1 to before 6.3.4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.2:-:*:*:*:*:*:* Versions 6.2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.2:rc6:*:*:*:*:*:* Versions 6.2 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.2:rc7:*:*:*:*:*:* Versions 6.2 rc7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.2:rc8:*:*:*:*:*:* Versions 6.2 rc8 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:* Versions 6.4 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.4:rc2:*:*:*:*:*:* Versions 6.4 rc2 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.10.181, 5.15.113, 6.1.30
  • Fix · CNA Linux (Linux) Fixed in 5.10.181, 5.15.113, 6.1.30, 6.3.4, 6.4

Red Hat 2 advisories

  • RHSA-2024:3421 Released 2024-05-28 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v.9.0) kernel-tools-libs-devel-5.14.0-70.101.1.el9_0
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) kernel-debug-devel-5.14.0-70.101.1.el9_0, kernel-debug-devel-matched-5.14.0-70.101.1.el9_0, kernel-devel-5.14.0-70.101.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS EUS (v.9.0) bpftool-5.14.0-70.101.1.el9_0, kernel-5.14.0-70.101.1.el9_0, kernel-abi-stablelists-5.14.0-70.101.1.el9_0 +14
  • RHSA-2023:6583 Released 2023-11-07 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-362.8.1.el9_3, libperf-5.14.0-362.8.1.el9_3
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-362.8.1.el9_3, kernel-64k-debug-devel-matched-5.14.0-362.8.1.el9_3, kernel-64k-devel-5.14.0-362.8.1.el9_3 +11
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.2.0-362.8.1.el9_3, kernel-5.14.0-362.8.1.el9_3, kernel-64k-5.14.0-362.8.1.el9_3 +29
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-362.8.1.el9_3, kernel-rt-core-5.14.0-362.8.1.el9_3, kernel-rt-debug-5.14.0-362.8.1.el9_3 +9
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-362.8.1.el9_3, kernel-rt-core-5.14.0-362.8.1.el9_3, kernel-rt-debug-5.14.0-362.8.1.el9_3 +11

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat CodeReady Linux Builder EUS (v.9.0)Fixed RHSA-2024:3421
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2024:3421
Red Hat Enterprise Linux BaseOS EUS (v.9.0)Fixed RHSA-2024:3421
Not affected: 4 products
  • Red Hat Enterprise Linux 10
  • 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-2023-53566
  2. 2026-10-03 Alias added: GHSA-pcw3-hvmm-479h
  3. 2026-10-16 CISA SSVC decision points changed

References

Patch 7

  • 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