CVE-2013-4205

Severity: medium (CVSS 4.7 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2013-08-25 · updated 2026-06-16
Weakness: CWE-399

Description

Memory leak in the unshare_userns function in kernel/user_namespace.c in the Linux kernel before 3.10.6 allows local users to cause a denial of service (memory consumption) via an invalid CLONE_NEWUSER unshare call.

Affected products

Linux kernel: through 3.10.5; 3.0-rc1, 3.0-rc2, 3.0-rc3, 3.0-rc4, 3.0-rc5, 3.0-rc6 (+244)

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=6160968cee8b90a5dd95318d716e31d7775c4ef3
http://twitter.com/grsecurity/statuses/364566062336978944
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.10.6
http://www.openwall.com/lists/oss-security/2013/08/06/2
http://www.ubuntu.com/usn/USN-1971-1
http://www.ubuntu.com/usn/USN-1974-1
https://github.com/torvalds/linux/commit/6160968cee8b90a5dd95318d716e31d7775c4ef3
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=6160968cee8b90a5dd95318d716e31d7775c4ef3
http://twitter.com/grsecurity/statuses/364566062336978944
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.10.6
http://www.openwall.com/lists/oss-security/2013/08/06/2
http://www.ubuntu.com/usn/USN-1971-1

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