EUVD-2026-38724
GHSA-3v47-mwg3-xvq2
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Local low-privilege access required to trigger ipset iteration; only availability impacted; no confidentiality, integrity, or scope change.
Primary rating from NVD.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
5DescriptionNVD
In the Linux kernel, the following vulnerability has been resolved:
netfilter: ipset: stop hash:* range iteration at end
The following hash set variants:
hash:ip,mark hash:ip,port hash:ip,port,ip hash:ip,port,net
iterate IPv4 ranges with a 32-bit iterator.
The iterator must stop once the last address in the requested range has been processed. Advancing it once more can move the traversal state past the end of the request, so a later retry may continue from an unintended position.
Handle the iterator increment explicitly at the end of the loop and stop once the upper bound has been processed. This keeps the existing retry behaviour intact for valid ranges while preventing traversal from continuing past the original boundary.
AnalysisAI
Denial of service in the Linux kernel netfilter ipset subsystem allows a local low-privileged user to disrupt availability by triggering an iterator overrun in hash:ip,mark, hash:ip,port, hash:ip,port,ip, or hash:ip,port,net set types during IPv4 range iteration. The 32-bit loop iterator is not properly bounded, allowing it to advance past the last address in the requested range; subsequent retry passes then resume from an unintended position, corrupting traversal state. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local shell session with at least low-privilege user credentials on the target host (CVSS PR:L, AV:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 5.5 (Medium) with vector AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H accurately reflects a locally-triggered, low-complexity availability-only impact with no confidentiality or integrity consequence. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A local attacker with a low-privileged shell account on a Linux system running an unpatched kernel creates or manipulates a netfilter ipset of type hash:ip,port (or related hash variant) targeting an IPv4 address range. By triggering a range-based enumeration that causes the 32-bit iterator to advance past the upper bound, the attacker forces the kernel's retry path to resume traversal from an unintended address position, ultimately causing the netfilter ipset subsystem to become unavailable or behave incorrectly. … |
| Remediation | Update the Linux kernel to a patched stable release: 5.10.258, 5.15.209, 6.1.175, 6.6.142, 6.12.92, 6.18.34, 7.0.11, or 7.1, depending on the active stable series in use. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same technique Denial Of Service
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External POC / Exploit Code
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