CVE-2026-80558: libceph: Avoid using invalid osd indices from primary_temp

mediumCVSS 5.9CVE-2026-80558

CSIRTS triage

vendor: Linux product: Linux Kernel Memory corruption

What: Input device registration ordering in the sur40 driver is incorrect, leading to potential device availability or cleanup issues.
Who is affected: Systems running Linux kernel with sur40 (Microsoft Surface 2.0 touch device) support enabled.
Urgency: Medium priority; CVSS 5.5 indicates moderate impact and should be patched in standard update cycles.
Action: Apply a Linux kernel update that corrects the input device registration order in the sur40 driver.

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 5.9
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80558

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-2026-805580.52% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-80558	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

criticalCVE-2026-80558: In the Linux kernel, the following vulnerability has been resolved: libceph: Avoid using inval…nvd

Recent advisories for libceph

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.

criticalCVE-2026-80561: In the Linux kernel, the following vulnerability has been resolved: libceph: fix multiple unsa…nvd · 2026-08-26
criticalCVE-2026-80558: In the Linux kernel, the following vulnerability has been resolved: libceph: Avoid using inval…nvd · 2026-08-26
criticalCVE-2026-80557: In the Linux kernel, the following vulnerability has been resolved: libceph: fix OOB read in d…nvd · 2026-08-26
highCVE-2026-68433: In the Linux kernel, the following vulnerability has been resolved: libceph: bound get_version…nvd · 2026-08-12
lowCVE-2026-68433: libceph: bound get_version reply decode to front lenmsrc · 2026-08-11
highCVE-2026-68155: libceph: Reject monmaps advertising zero monitorsmsrc · 2026-08-11