netfilter: nf_tables: adapt set backend to use GC transaction API
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: adapt set backend to use GC transaction API Use the GC transaction API to replace the old and buggy gc API and the busy mark approach. No set elements are removed from async garbage collection anymore, instead the _DEAD bit is set on so the set element is not visible from lookup path anymore. Async GC enqueues transaction work that might be aborted and retried later. rbtree and pipapo set backends does not set on the _DEAD bit from the sync GC path since this runs in control plane path where mutex is held. In this case, set elements are deactivated, removed and then released via RCU callback, sync GC never fails.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 4.1 and later | 4.19.316, 5.4.262, 5.10.198, 5.15.134, 6.1.56, 6.4.11, 6.5 | Patch available | CNA |
- Linux VendorLinux Affected 4.1 and later Fixed in 4.19.316, 5.4.262, 5.10.198, 5.15.134, 6.1.56, 6.4.11, 6.5 Patch available CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.1 to before 4.19.316; 4.20 to before 5.4.262; 5.5 to before 5.10.198; 5.11 to before 5.15.134; 5.16 to before 6.1.56; 6.2 to before 6.4.11 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:* | 6.5 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:* | 6.5 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:* | 6.5 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:* | 6.5 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc5:*:*:*:*:*:* | 6.5 rc5 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.1 to before 4.19.316; 4.20 to before 5.4.262; 5.5 to before 5.10.198; 5.11 to before 5.15.134; 5.16 to before 6.1.56; 6.2 to before 6.4.11 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:* Versions 6.5 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:* Versions 6.5 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:* Versions 6.5 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:* Versions 6.5 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc5:*:*:*:*:*:* Versions 6.5 rc5 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.19.316, 5.4.262, 5.10.198, 5.15.134, 6.1.56, 6.4.11, 6.5
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Out of support scope |
Not affected: 3 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2023-52923
- 2026-10-03 Alias added: GHSA-f2qv-j847-m6vp
References
Patch 7
- https://git.kernel.org/stable/c/cb4d00b563675ba8ff6ef94b077f58d816f68ba3
- https://git.kernel.org/stable/c/c357648929c8dff891502349769aafb8f0452bc2
- https://git.kernel.org/stable/c/146c76866795553dbc19998f36718d7986ad302b
- https://git.kernel.org/stable/c/479a2cf5259347d6a1f658b0f791d27a34908e91
- https://git.kernel.org/stable/c/df650d6a4bf47248261b61ef6b174d7c54034d15
- https://git.kernel.org/stable/c/e4d71d6a9c7db93f7bf20c3a0f0659d63d7de681
- https://git.kernel.org/stable/c/f6c383b8c31a93752a52697f8430a71dcbc46adf
More Linux Kernel vulnerabilities
- 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
Sources
- CVE-2023-52923 · CVE Program
- CVE-2023-52923 · NVD
- FIRST EPSS
- GHSA-f2qv-j847-m6vp · GitHub Advisory Database · CC BY 4.0
- CVE-2023-52923 · Red Hat security data · CC BY 4.0
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