Distribution advisory
This page covers CVE-2023-23583 as tracked by Ubuntu, for the package intel-microcode. The fix is available in version 3.20231114.0ubuntu0.22.04.1; earlier versions remain affected.
How this vulnerability can be exploited
This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.
CVSS metrics in full
The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack vector: Local — a local account, shell or session on the host is needed.
- Attack complexity: Low — the attack works reliably, with no preparation.
- Privileges required: Low — an ordinary user account is enough.
- User interaction: None — nobody has to be tricked into anything.
- Scope: Unchanged — the damage stays inside the vulnerable component.
- Confidentiality impact: High — total loss, or loss the attacker controls.
- Integrity impact: High — total loss, or loss the attacker controls.
- Availability impact: High — total loss, or loss the attacker controls.
Weakness class
UBUNTU-CVE-2023-23583 is classified as CWE-1281: Sequence of Processor Instructions Leads to Unexpected Behavior. Specific combinations of processor instructions lead to undesirable behavior such as locking the processor until a hard reset performed.
Affected software
UBUNTU-CVE-2023-23583 is recorded against 1 package.
- intel-microcode (fixed in 3.20231114.0ubuntu0.22.04.1)
Timeline and source
Published on 14 November 2023 and last revised on 4 February 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
ubuntu.com (Report)
www.intel.com (Report)
www.intel.com (Report)
www.openwall.com (Report)
lock.cmpxchg8b.com (Report)
ubuntu.com (Advisory)
www.cve.org (Report)
Other advisories for this package
intel-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-1281: Sequence of Processor Instructions Leads to Unexpected Behavior) in other software:
