Distribution advisory
This page covers CVE-2025-48509 as tracked by Ubuntu, for the package amd64-microcode. No fixed version has been recorded for this distribution yet.
How this vulnerability can be exploited
This issue can be reached with local access to the system, attack complexity is high, an attacker needs administrative privileges on the target. No user interaction is required. Rated impact: confidentiality none, integrity none, availability none.
CVSS metrics in full
The score comes from this vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
- Attack vector: Local — a local account, shell or session on the host is needed.
- Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
- Attack requirements: None — no deployment-specific condition has to hold.
- Privileges required: High — administrative rights are needed first.
- User interaction: None — nobody has to be tricked into anything.
- Confidentiality impact: None.
- Integrity impact: None.
- Availability impact: None.
Weakness class
UBUNTU-CVE-2025-48509 is classified as CWE-665: Improper Initialization. The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.
Affected software
UBUNTU-CVE-2025-48509 is recorded against 1 package.
Timeline and source
Published on 10 February 2026 and last revised on 25 June 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
ubuntu.com (Report)
www.cve.org (Report)
www.amd.com (Report)
Other advisories for this package
amd64-microcode has other advisories on record. If you are patching this one, these are worth checking on the same host:
Same weakness in other software
These advisories are the same class of weakness (CWE-665: Improper Initialization) in other software:
