How many CVEs have patched closer?

3 published CVEs changed closer in opencontainers/runc, in 6 distinct patches totalling 66 changed lines, between 2025 and 2025.

What is the latest CVE that changed closer?

CVE-2025-52881 (runc: LSM labels can be bypassed with malicious config using dummy procfs files), published 2025-11-06, changed lines 42 to 50 of libcontainer/apparmor/apparmor_linux.go.

How does closer compare to the rest of opencontainers/runc?

opencontainers/runc has 16 CVEs with a located fix in total; 3 of them changed closer.

What do the line numbers refer to?

Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

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Closer

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Runc
Closer

closer in opencontainers/runc: Patched by 3 CVEs

opencontainers/runc

Function

4 files

closer

Name: closer in opencontainers/runc: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

Defined in 4 files

Last patched November 6, 2025

CVEs

That changed this function

Distinct patches

Backports counted once

Lines changed

Added plus removed

2025

Years

By CVE publication date

Overview

closer in opencontainers/runc was changed by 3 published CVE fixes in 2025, in 6 distinct patches that added or removed 66 lines in total.

The name occurs in 4 files: libcontainer/rootfs_linux.go, libcontainer/standard_init_linux.go, libcontainer/apparmor/apparmor_linux.go, libcontainer/utils/utils_unix.go.

opencontainers/runc has 16 CVEs with a located fix in total, so 19% of them touched this function.

CVEs that patched it

Every published CVE whose fix changed closer, newest first, with the lines each fix touched.

runc: LSM labels can be bypassed with malicious config using dummy procfs files
CVE-2025-52881 · libcontainer/apparmor/apparmor_linux.go · lines 42–50 · +4 −4
High · CVSS 7.3
EPSS 0.6%2025-11-06
runc: LSM labels can be bypassed with malicious config using dummy procfs files
CVE-2025-52881 · libcontainer/rootfs_linux.go · lines 965–967 · +3 −5
High · CVSS 7.3
EPSS 0.6%2025-11-06
runc: LSM labels can be bypassed with malicious config using dummy procfs files
CVE-2025-52881 · libcontainer/standard_init_linux.go · lines 263–273 · +5 −7
High · CVSS 7.3
EPSS 0.6%2025-11-06
runc: LSM labels can be bypassed with malicious config using dummy procfs files
CVE-2025-52881 · libcontainer/utils/utils_unix.go · lines 63–71 · +5 −5
High · CVSS 7.3
EPSS 0.6%2025-11-06
container escape due to /dev/console mount and related races
CVE-2025-52565 · libcontainer/standard_init_linux.go · lines 263–273 · +5 −7
High · CVSS 8.4
EPSS 0.6%2025-11-06
runc container escape via "masked path" abuse due to mount race conditions
CVE-2025-31133 · libcontainer/rootfs_linux.go · lines 1283–1299 · +15 −1
High · CVSS 7.3
EPSS 0.8%2025-11-06

Get an alert when the next CVE fix lands in opencontainers/runc, with the patched functions.

Monitor runc CVEs

Other functions in these files

Functions in the same files that CVE fixes also changed.

1mountToRootfslibcontainer/rootfs_linux.go6 CVEs · 11 patches2019 to 2025
2mountCgroupV2libcontainer/rootfs_linux.go5 CVEs · 7 patches2021 to 2025
3Initlibcontainer/standard_init_linux.go5 CVEs · 6 patches2017 to 2025
4createDeviceNodelibcontainer/rootfs_linux.go4 CVEs · 7 patches2021 to 2025
5mountCgroupV1libcontainer/rootfs_linux.go3 CVEs · 7 patches2021 to 2025
6Closelibcontainer/rootfs_linux.go3 CVEs · 4 patches2024 to 2025
7prepareBindMountlibcontainer/rootfs_linux.go3 CVEs · 3 patches2019 to 2024
8createMountpointlibcontainer/rootfs_linux.go2 CVEs · 6 patches2024 to 2025

Other hotspots in the repository

Functions in opencontainers/runc changed by the most CVE fixes.

mountToRootfs6 CVEs · libcontainer/rootfs_linux.go mountCgroupV25 CVEs · libcontainer/rootfs_linux.go Init5 CVEs · libcontainer/standard_init_linux.go createDeviceNode4 CVEs · libcontainer/rootfs_linux.go mountCgroupV13 CVEs · libcontainer/rootfs_linux.go Close3 CVEs · libcontainer/rootfs_linux.go

All patched functions in opencontainers/runc

Frequently asked questions

Common questions about CVE fixes to closer.

How many CVEs have patched closer?: 3 published CVEs changed closer in opencontainers/runc, in 6 distinct patches totalling 66 changed lines, between 2025 and 2025.
What is the latest CVE that changed closer?: CVE-2025-52881 (runc: LSM labels can be bypassed with malicious config using dummy procfs files), published 2025-11-06, changed lines 42 to 50 of libcontainer/apparmor/apparmor_linux.go.
How does closer compare to the rest of opencontainers/runc?: opencontainers/runc has 16 CVEs with a located fix in total; 3 of them changed closer.
What do the line numbers refer to?: Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

References

libcontainer/rootfs_linux.go on GitHub (opens in a new tab)
libcontainer/standard_init_linux.go on GitHub (opens in a new tab)
libcontainer/apparmor/apparmor_linux.go on GitHub (opens in a new tab)
All patched functions in opencontainers/runc
Patched functions directory

Fix locations are computed by RadicalNotion.AI from the upstream patch diff of each CVE. CVE data is sourced from the CVE Program.

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On this page

Overview
CVEs that patched it
Other functions in these files
Other hotspots in the repository
FAQ
References