netfilter: ipset: Fix suspicious rcu_dereference_protected()
Priority LOW 25Published · 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: ipset: Fix suspicious rcu_dereference_protected() When destroying all sets, we are either in pernet exit phase or are executing a "destroy all sets command" from userspace. The latter was taken into account in ip_set_dereference() (nfnetlink mutex is held), but the former was not. The patch adds the required check to rcu_dereference_protected() in ip_set_dereference().
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00276 20th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.96, 6.6.36, 6.9.7Red 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 | 6.1.95 to before 6.1.96; 6.6.35 to before 6.6.36; 6.9.6 to before 6.9.7 | 6.1.96, 6.6.36, 6.9.7 | Patch available | CNA |
- Linux VendorLinux Affected 6.1.95 to before 6.1.96; 6.6.35 to before 6.6.36; 6.9.6 to before 6.9.7 Fixed in 6.1.96, 6.6.36, 6.9.7 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:6.1.95:*:*:*:*:*:*:* | 6.1.95 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.6.35:*:*:*:*:*:*:* | 6.6.35 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.9.6:*:*:*:*:*:*:* | 6.9.6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:* | 6.10 rc4 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:6.1.95:*:*:*:*:*:*:* Versions 6.1.95 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.6.35:*:*:*:*:*:*:* Versions 6.6.35 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.9.6:*:*:*:*:*:*:* Versions 6.9.6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:* Versions 6.10 rc4 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.1.96, 6.6.36, 6.9.7
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
Not affected: 2 products
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2024-40993
- 2026-10-03 Alias added: GHSA-66vv-cf65-88qw
References
Patch 7
- https://git.kernel.org/stable/c/3799d02ae4208af08e81310770d8754863a246a1
- https://git.kernel.org/stable/c/72d9611968867cc4c5509e7708b1507d692b797a
- https://git.kernel.org/stable/c/523bed6489e089dd8040e72453fb79da47b144c2
- https://git.kernel.org/stable/c/788d585e62f487bc4536d454937f737b70d39a33
- https://git.kernel.org/stable/c/94dd411c18d7fff9e411555d5c662d29416501e4
- https://git.kernel.org/stable/c/3fc09e1ca854bc234e007a56e0f7431f5e2defb5
- https://git.kernel.org/stable/c/8ecd06277a7664f4ef018abae3abd3451d64e7a6
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-2024-40993 · CVE Program
- CVE-2024-40993 · NVD
- FIRST EPSS
- GHSA-66vv-cf65-88qw · GitHub Advisory Database · CC BY 4.0
- CVE-2024-40993 · Red Hat security data · CC BY 4.0
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