EUVD-2026-77872
GHSA-fw5p-prjf-rq4f
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-reachable via malicious NFS server but the victim must connect (UI:R); impact is a kernel panic (A:H) with no confirmed confidentiality/integrity effect despite memory-corruption language.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
5DescriptionNVD
An integer overflow was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Connecting to a malicious NFS server may cause unexpected system termination or corrupt kernel memory.
AnalysisAI
Integer overflow in the macOS kernel NFS client can be triggered when an unpatched Mac connects to or mounts a share from a malicious or spoofed NFS server, leading to kernel memory corruption or unexpected system termination. Affected systems are macOS releases below Sequoia 15.8, Tahoe 26.7, and Golden Gate 27 (CPE cpe:2.3:a:apple:macos). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the macOS host to connect to or mount a share from an attacker-controlled (or attacker-spoofed) NFS server - the victim must initiate or be induced into an NFS client session, so this is a malicious-server / client-side flaw rather than exploitation of a listening service. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a moderate-priority, availability-only kernel bug, not an urgent RCE. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Primary fix: apply Vendor-released patch - upgrade to macOS Sequoia 15.8, macOS Tahoe 26.7, or macOS Golden Gate 27, whichever corresponds to your current release train, per Apple advisories https://support.apple.com/en-us/149035, https://support.apple.com/en-us/149042, and https://support.apple.com/en-us/149043; no further mitigation is needed once the update is installed. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all macOS systems below Sequoia 15.8, Tahoe 26.7, and Golden Gate 27 and identify any that mount NFS shares; temporarily disable NFS client where not essential and block outbound NFS traffic to untrusted networks. …
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Same weakness CWE-190 – Integer Overflow or Wraparound
View allSame technique Buffer Overflow
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External POC / Exploit Code
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