netfilter: nft_set_rbtree: check for partial overlaps in anonymous sets
Priority LOW 24Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_rbtree: check for partial overlaps in anonymous sets Userspace provides an optimized representation in case intervals are adjacent, where the end element is omitted. The existing partial overlap detection logic skips anonymous set checks on start elements for this reason. However, it is possible to add intervals that overlap to this anonymous where two start elements with the same, eg. A-B, A-C where C < B. start end A B start end A C Restore the check on overlapping start elements to report an overlap.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0016 5th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.252, 5.15.202, 6.1.165 +7Red Hat: 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.10.166 to before 5.10.252; 5.15.91 to before 5.15.202; 6.1.9 to before 6.1.165; 4.19.316 to before 4.20; 5.4.262 to before 5.5 | 5.10.252, 5.15.202, 6.1.165, 4.20, 5.5 | Patch available | CNA |
| Linux | Linux | 6.2 and later | 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.14, 6.19.4, 7.0 | Patch available | CNA |
- Linux VendorLinux Affected 5.10.166 to before 5.10.252; 5.15.91 to before 5.15.202; 6.1.9 to before 6.1.165; 4.19.316 to before 4.20; 5.4.262 to before 5.5 Fixed in 5.10.252, 5.15.202, 6.1.165, 4.20, 5.5 Patch available CNA
- Linux VendorLinux Affected 6.2 and later Fixed in 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.14, 6.19.4, 7.0 Patch available CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.19.316 to before 4.20; 5.4.262 to before 5.5; 5.10.166 to before 5.10.252; 5.15.91 to before 5.15.202; 6.1.9 to before 6.1.165; 6.2.1 to before 6.6.128; 6.7 to before 6.12.75; 6.13 to before 6.18.14; 6.19 to before 6.19.4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2:-:*:*:*:*:*:* | 6.2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2:rc6:*:*:*:*:*:* | 6.2 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2:rc7:*:*:*:*:*:* | 6.2 rc7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2:rc8:*:*:*:*:*:* | 6.2 rc8 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.19.316 to before 4.20; 5.4.262 to before 5.5; 5.10.166 to before 5.10.252; 5.15.91 to before 5.15.202; 6.1.9 to before 6.1.165; 6.2.1 to before 6.6.128; 6.7 to before 6.12.75; 6.13 to before 6.18.14; 6.19 to before 6.19.4 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
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.252, 5.15.202, 6.1.165, 4.20, 5.5
- Fix · CNA Linux (Linux) Fixed in 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.14, 6.19.4, 7.0
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 3 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2026-45873
- 2026-10-03 Alias added: GHSA-9868-rgmf-pm96
- 2026-11-06 CISA SSVC decision points changed
References
Patch 8
- https://git.kernel.org/stable/c/7ca5813e1b21ef300e04593f47b073ef3217aac6
- https://git.kernel.org/stable/c/029e5f6a95e905b12d6bc20421be32a01e0eb311
- https://git.kernel.org/stable/c/f1381ce0a1dd013610985e1c4260908163a427df
- https://git.kernel.org/stable/c/f1535d56fc3f6c625b7e0559c006bd0318791bb1
- https://git.kernel.org/stable/c/05feaf826390fd16f1deb89dd9412def3b2a280f
- https://git.kernel.org/stable/c/dad14d22dff1a191612acb98facceb303d0524a2
- https://git.kernel.org/stable/c/e6497e06a102870803a59570d75ed2c36d7e11b3
- https://git.kernel.org/stable/c/4780ec142cbb24b794129d3080eee5cac2943ffc
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-2026-45873 · CVE Program
- CVE-2026-45873 · NVD
- FIRST EPSS
- GHSA-9868-rgmf-pm96 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-45873 · Red Hat security data · CC BY 4.0
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