CVE-2023-52670: rpmsg: virtio: Free driver_override when rpmsg_remove()

mediumCVSS 6.6CVE-2023-52670

CSIRTS triage

vendor: Linux product: Linux Kernel Memory corruption

What: The rpmsg virtio driver fails to free the driver_override field when rpmsg_remove() is called, causing a memory leak.
Who is affected: Linux systems using rpmsg virtio transport in affected kernel versions.
Urgency: Medium severity (CVSS 6.6) but not exploited; standard patching applies.
Action: Apply kernel patches for CVE-2023-52670 when available from your distribution.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 6.6
Published: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-52670

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2023-526700.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2023-52670	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow denial of servicecert-bund

Recent advisories for rpmsg

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-63797: In the Linux kernel, the following vulnerability has been resolved: rpmsg: char: Fix use-after…nvd · 2026-07-19
criticalCVE-2026-63797: rpmsg: char: Fix use-after-free on probe error pathmsrc · 2026-07-14
mediumCVE-2026-53158: misc: fastrpc: Fix NULL pointer dereference in rpmsg callbackmsrc · 2026-06-09