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CVE-2023-1521

Local Privilege Escalation in sccache

HIGH
7.8
CVSS Score
Published: November 26, 2024 at 11:15 AM UTC
Updated: June 17, 2026 at 05:28 AM UTC
1 product affected across 1 vendorSccache

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Severity
HIGH7.8
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

On Linux the sccache client can execute arbitrary code with the privileges of a local sccache server, by preloading the code in a shared library passed to LD_PRELOAD. If the server is run as root (which is the default when installing the snap package https://snapcraft.io/sccache ), this means a user running the sccache client can get root privileges.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Sccache· Mozillacargo
95%
v < 0.4.0
Affected range stops below 0.4.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor AdvisoryThird Party Advisory
Source: [email protected]
https://github.com/advisories/GHSA-x7fr-pg8f-93f5
Third Party AdvisoryExploit
Source: [email protected]
https://securitylab.github.com/advisories/GHSL-2023-046_ScCache

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-426

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