Information disclosure in Linuxfoundation Runc
CVE-2024-21626
runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. In runc 1.1.11 and earlier, due to an internal file descriptor leak, an attacker could cause a newly-spawned container process (from runc exec) to have a working directory in the host filesystem namespace, allowing for a container escape by giving access to the host filesystem ("attack 2"). The same attack could be used by a malicious image to allow a container process to gain access to the host filesystem through runc run ("attack 1"). Variants of attacks 1 and 2 could be also be used to overwrite semi-arbitrary host binaries, allowing for complete container escapes ("attack 3a" and "attack 3b"). runc 1.1.12 includes patches for this issue.
EPSS: 0.181 (97.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.
Affected products
- Linuxfoundation Runc
- Opencontainers Runc — versions >=v1.0.0-rc93, < 1.1.12
- Fedoraproject Fedora — versions 39
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
- security-advisories@github.com (Mailing List)
- security-advisories@github.com (Mailing List)
- security-advisories@github.com (Exploit, VDB Entry, Third Party Advisory)
- security-advisories@github.com (Mailing List)
- security-advisories@github.com
- security-advisories@github.com
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2024-21626?
- CVE-2024-21626 is a high-severity vulnerability in Linuxfoundation Runc, classified under Exposure of File Descriptor to Unintended Control Sphere (File Descriptor Leak). CVSS score: 8.6/10. Published 2024-01-31.
- How severe is CVE-2024-21626?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2024-21626 known to be exploited?
- 70 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.