What’s Vulnerable › Vulnerabilities

CVE-2014-9710

• Severity: medium (CVSS 6.9 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: 2015-05-27 · updated 2026-06-17
• Weakness: CWE-362

Description

The Btrfs implementation in the Linux kernel before 3.19 does not ensure that the visible xattr state is consistent with a requested replacement, which allows local users to bypass intended ACL settings and gain privileges via standard filesystem operations (1) during an xattr-replacement time window, related to a race condition, or (2) after an xattr-replacement attempt that fails because the data does not fit.

Affected products

• Linux kernel: before 3.10.83; from 3.11 before 3.12.45; from 3.13 before 3.14.47; from 3.15 before 3.16.35; from 3.17 before 3.18.19 — fixed in 3.10.83, 3.12.45, 3.14.47, 3.16.35, 3.18.19

How to fix

Upgrade to a fixed version: Linux kernel 3.10.83, 3.12.45, 3.14.47, 3.16.35. Check the vendor advisory for mitigations.

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=5f5bc6b1e2d5a6f827bc860ef2dc5b6f365d1339
• http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00023.html
• http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00009.html
• http://www.openwall.com/lists/oss-security/2015/03/24/11
• http://www.securitytracker.com/id/1032418
• https://bugzilla.redhat.com/show_bug.cgi?id=1205079
• https://github.com/torvalds/linux/commit/5f5bc6b1e2d5a6f827bc860ef2dc5b6f365d1339
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=5f5bc6b1e2d5a6f827bc860ef2dc5b6f365d1339
• http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00023.html
• http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00009.html
• http://www.openwall.com/lists/oss-security/2015/03/24/11
• http://www.securitytracker.com/id/1032418

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