# CVE-2026-93433: Libstoragemgmt: libstoragemgmt: denial of service via stack buffer overflow in scsi vpd page parsing

Status: published. Published: 2026-09-21. Updated: 2026-11-06.

A flaw was found in libstoragemgmt. An attacker with control over a local or virtual storage device could provide specially crafted SCSI (Small Computer System Interface) Vital Product Data (VPD) page 0x80 data. This malformed data, specifically an untrusted page length field, can lead to a stack buffer overflow in the `_sg_parse_vpd_80()` function during serial number parsing. Successful exploitation could result in a denial of service by crashing or destabilizing the process querying the serial number.

## Remediation

- workaround: Avoid querying local disk serial numbers from untrusted or attacker-controlled storage devices or virtual storage backends. Systems should be configured to reject or sanitize malformed SCSI VPD page 0x80 data before it is processed by libstoragemgmt to prevent stack buffer overflows. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Enterprise Linux 10 (libstoragemgmt): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (libstoragemgmt): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (libstoragemgmt): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (libstoragemgmt): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 5.5 (medium); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.15% as of 2026-11-05; percentile 4.65%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-121

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/security/cve/CVE-2026-93433 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2465818 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-93433; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-93433; retrieved 2026-11-06; source updated Not reported

Revision: 01575d47eacd5b0623b245b530cb29e7f74c2ae1463f520813e6aa3a1cdad1c5

Canonical: https://y2.dev/cve/CVE-2026-93433

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