CVE-2013-1957

Severity: medium (CVSS 4.7 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2013-04-24 · updated 2026-06-16
Weakness: CWE-264

Description

The clone_mnt function in fs/namespace.c in the Linux kernel before 3.8.6 does not properly restrict changes to the MNT_READONLY flag, which allows local users to bypass an intended read-only property of a filesystem by leveraging a separate mount namespace.

Affected products

Linux kernel: through 3.8.5; 3.8.0, 3.8.1, 3.8.2, 3.8.3, 3.8.4

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=132c94e31b8bca8ea921f9f96a57d684fa4ae0a9
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.6
http://www.openwall.com/lists/oss-security/2013/04/16/11
https://github.com/torvalds/linux/commit/132c94e31b8bca8ea921f9f96a57d684fa4ae0a9
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=132c94e31b8bca8ea921f9f96a57d684fa4ae0a9
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.6
http://www.openwall.com/lists/oss-security/2013/04/16/11
https://github.com/torvalds/linux/commit/132c94e31b8bca8ea921f9f96a57d684fa4ae0a9

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