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

accel: ethosu: Ensure SRAM size is 0 on mapping failure

On a mapping failure of the SRAM, the SRAM size is left as non-zero. The
probe will succeed as the error return is not checked since having SRAM is
not a hard requirement. The non-zero size allows jobs to access SRAM which
is left pointing to physical base address 0x0.
Published: 2026-09-25
Score: 5.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Patch
AI Analysis

Impact

During a SRAM mapping attempt within the EthosU acceleration driver, a failure is not correctly detected; as a result, the driver leaves the SRAM size field non‑zero and reports success. Subsequent job requests then proceed under the assumption that SRAM is available and access the region whose base address is 0x0. This mismatch can cause the kernel to read or write to an unmapped or unintended memory region, potentially corrupting kernel data structures or triggering a crash. The primary consequence identified in the description is a loss of availability rather than privilege escalation.

Affected Systems

Based on the description, it is inferred that any Linux kernel that includes the unpatched EthosU driver code may be affected. Systems that include the driver and have EthosU hardware are likely at risk, while environments that do not include the driver or have disabled it are not affected.

Risk and Exploitability

The EPSS score is 0.00189 and the CVE is not listed in CISA’s KEV catalog, indicating no publicly reported exploits at present. With a CVSS score of 5.5, the vulnerability is rated medium. Exhaustive exploitation requires the attacker to be able to submit jobs to the EthosU driver, which generally implies local or partially privileged access. It is inferred that by submitting a crafted job, one could trigger the mapping failure path and cause the driver to believe SRAM is present, leading to a null‑pointer or invalid memory access that most likely results in a kernel panic. The vulnerability does not provide a standalone privilege‑escalation path, so its impact is primarily denial of service rather than systemic takeover. Given the lack of exploitation data, the risk can be considered moderate until further evidence emerges.

Generated by OpenCVE AI on October 1, 2026 at 09:09 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade to a Linux kernel version that incorporates the EthosU mapping bug fix.
  • If a kernel upgrade cannot be performed immediately, implement an in‑kernel patch or driver workaround that sets the SRAM size to zero or immediately aborts job submission when the mapping function returns an error.
  • Disable or unload the EthosU driver on systems where the hardware is not needed to eliminate the adverse code path.

Generated by OpenCVE AI on October 1, 2026 at 09:09 UTC.

Tracking

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Advisories

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History

Thu, 01 Oct 2026 07:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-457
CWE-665

Wed, 30 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-908
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate


Fri, 25 Sep 2026 22:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-457
CWE-665

Fri, 25 Sep 2026 10:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: accel: ethosu: Ensure SRAM size is 0 on mapping failure On a mapping failure of the SRAM, the SRAM size is left as non-zero. The probe will succeed as the error return is not checked since having SRAM is not a hard requirement. The non-zero size allows jobs to access SRAM which is left pointing to physical base address 0x0.
Title accel: ethosu: Ensure SRAM size is 0 on mapping failure
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-10-19T09:10:38.497Z

Reserved: 2026-09-25T10:18:58.201Z

Link: CVE-2026-97912

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-25T11:17:18.173

Modified: 2026-10-19T10:17:41.803

Link: CVE-2026-97912

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-25T00:00:00Z

Links: CVE-2026-97912 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-01T09:15:06Z

Weaknesses
  • CWE-908

    Use of Uninitialized Resource