CVE-2026-53277

Status: ModifiedHigh (8.8)—

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation

walk_s1() and kvm_walk_nested_s2() expect to be called while holding kvm->srcu to guard against memslot changes. While this is generally the case, __kvm_at_s12() and __kvm_find_s1_desc_level() call into the respective walkers without taking kvm->srcu.

Fix by acquiring kvm->srcu prior to the table walk in both instances.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Base score: 8.8

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.15%
Percentile among all scored CVEs: 4
Score date: 10/4/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Primary impactT1005 Data from Local Systemcollection75 %
Secondary impactT1499.004 Application or System Exploitationimpact65 %
Secondary impactT1565 Data Manipulationimpact70 %

Vulnerabilidad local sin interacción (AV:L, UI:N, PR:L) en kernel Linux que causa race condition en sincronización SRCU durante caminatas de tabla de páginas KVM, permitiendo lectura/corrupción de memoria del hipervisor e impacto sobre disponibilidad.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Threat Intelligence Program Restrict File and Directory Permissions Remote Data Storage Network Segmentation Filter Network Traffic Execution Prevention

Affected technologies (1)

Linux — Linux Kernel

CWEs

CWE-662
CWE-820

References

Raw JSON (NVD)

Show

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