CVE-2026-95507
libslirp: libslirp: out-of-bounds read in NC-SI OEM response handler discloses host memory to guest
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 22, 2026
Updated · September 30, 2026
Description
An out-of-bounds read was found in the NC-SI OEM response handler of libslirp. A truncated NC-SI OEM Ethernet frame causes ncsi_rsp_handler_oem() to read up to 4 bytes beyond the supplied packet length and reflect the value into the response sent to the guest, resulting in guest-observable disclosure of adjacent host process memory.
Statement
Moderate: A flaw in libslirp's NC-SI OEM response handler allows a malicious guest to trigger an out-of-bounds read, leading to the disclosure of up to 4 bytes of adjacent host RX-buffer memory. This bounded memory disclosure is guest-triggerable and does not involve write access or code execution on the host.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE-125 · Out-of-bounds Read