netfilter: ipset: fix performance regression in swap operation
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- 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 performance regression in swap operation The patch "netfilter: ipset: fix race condition between swap/destroy and kernel side add/del/test", commit 28628fa9 fixes a race condition. But the synchronize_rcu() added to the swap function unnecessarily slows it down: it can safely be moved to destroy and use call_rcu() instead. Eric Dumazet pointed out that simply calling the destroy functions as rcu callback does not work: sets with timeout use garbage collectors which need cancelling at destroy which can wait. Therefore the destroy functions are split into two: cancelling garbage collectors safely at executing the command received by netlink and moving the remaining part only into the rcu callback.
Why it matters now
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 | 5.4.264 to before 5.4.269; 5.10.204 to before 5.10.210; 5.15.143 to before 5.15.149; 6.1.68 to before 6.1.79; 6.6.7 to before 6.6.18; 4.19.302 to before 4.20 | 5.4.269, 5.10.210, 5.15.149, 6.1.79, 6.6.18, 4.20 | Patch available | CNA |
| Linux | Linux | 6.7 and later | 5.4.269, 5.10.210, 5.15.149, 6.1.79, 6.6.18, 6.7.6, 6.8 | Patch available | CNA |
- Linux VendorLinux Affected 5.4.264 to before 5.4.269; 5.10.204 to before 5.10.210; 5.15.143 to before 5.15.149; 6.1.68 to before 6.1.79; 6.6.7 to before 6.6.18; 4.19.302 to before 4.20 Fixed in 5.4.269, 5.10.210, 5.15.149, 6.1.79, 6.6.18, 4.20 Patch available CNA
- Linux VendorLinux Affected 6.7 and later Fixed in 5.4.269, 5.10.210, 5.15.149, 6.1.79, 6.6.18, 6.7.6, 6.8 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | before 5.4.269; 5.5 to before 5.10.210; 5.11 to before 5.15.149; 5.16 to before 6.1.79; 6.2 to before 6.6.18; 6.7 to before 6.7.6 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 5.4.269; 5.5 to before 5.10.210; 5.11 to before 5.15.149; 5.16 to before 6.1.79; 6.2 to before 6.6.18; 6.7 to before 6.7.6 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.4.269, 5.10.210, 5.15.149, 6.1.79, 6.6.18, 4.20
- Fix · CNA Linux (Linux) Fixed in 5.4.269, 5.10.210, 5.15.149, 6.1.79, 6.6.18, 6.7.6, 6.8
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-2024-26910
- 2026-10-03 Alias added: GHSA-4p7x-7wc6-4gf5
References
Patch 7
- https://git.kernel.org/stable/c/c7f2733e5011bfd136f1ca93497394d43aa76225
- https://git.kernel.org/stable/c/a24d5f2ac8ef702a58e55ec276aad29b4bd97e05
- https://git.kernel.org/stable/c/c2dc077d8f722a1c73a24e674f925602ee5ece49
- https://git.kernel.org/stable/c/653bc5e6d9995d7d5f497c665b321875a626161c
- https://git.kernel.org/stable/c/b93a6756a01f4fd2f329a39216f9824c56a66397
- https://git.kernel.org/stable/c/970709a67696b100a57b33af1a3d75fc34b747eb
- https://git.kernel.org/stable/c/97f7cf1cd80eeed3b7c808b7c12463295c751001
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-2024-26910 · CVE Program
- CVE-2024-26910 · NVD
- FIRST EPSS
- GHSA-4p7x-7wc6-4gf5 · GitHub Advisory Database · CC BY 4.0
- CVE-2024-26910 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences