CVE-2026-53170

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-25. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

accel/ethosu: reject DMA commands with uninitialized length

cmd_state_init() initializes the command state with memset(0xff), leaving dma->len at U64_MAX to signal missing setup. The only setter is NPU_SET_DMA0_LEN; if userspace omits this command and issues NPU_OP_DMA_START, dma->len remains U64_MAX.

In dma_length(), a positive stride added to U64_MAX wraps to a small value. With size0 == 1, check_mul_overflow() does not trigger and dma_length() returns 0 instead of U64_MAX. The caller's U64_MAX check then passes, region_size[] stays 0, and the bounds check in ethosu_job.c is bypassed, allowing hardware to execute DMA with stale physical addresses.

Fix by checking for U64_MAX at the start of dma_length() before any arithmetic, consistent with the sentinel value used throughout the driver to detect uninitialized fields.

CVSS v3
8.8
EG Score
8.8(high)
EPSS
3.5%
KEV
Not listed

Published

June 25, 2026

Last Modified

July 6, 2026

Advisory Details (2)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

accel/ethosu: reject DMA commands with uninitialized length - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fb25c76a820ca8a547aa478bfb503da0a11494ab
generic

accel/ethosu: reject DMA commands with uninitialized length - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d9d021218162b6c4fe0bdf42b2b340f1aae23a12

Vendor Advisories for CVE-2026-53170(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Frequently asked(5)

What is CVE-2026-53170?
CVE-2026-53170 is a high vulnerability published on June 25, 2026. In the Linux kernel, the following vulnerability has been resolved: accel/ethosu: reject DMA commands with uninitialized length cmdstateinit() initializes the command state with memset(0xff), leaving dma->len at U64_MAX to signal missing setup. The only setter is NPUSETDMA0_LEN; if userspace omits…
When was CVE-2026-53170 disclosed?
CVE-2026-53170 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on July 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53170 actively exploited?
CVE-2026-53170 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-53170?
CVE-2026-53170 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-53170?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53170, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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