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CVE-2024-21626

Medium

Elevated severity or exploit probability.

CVSS base
8.6 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
18.1%
97.1th percentile
CISA KEV
Not listed
Weakness / dates
CWE-200
Published 2024-01-31 · modified 2026-09-17

CVSS breakdown

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Attack VectorLLocal
Attack ComplexityLLow
Privileges RequiredNNone
User InteractionRRequired
ScopeCChanged
ConfidentialityHHigh
IntegrityHHigh
AvailabilityHHigh

Timeline

Description

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.

Affected

fedoraproject linuxfoundation

References

Official: NVD · CVE.org