CVE-2014-2038

The nfs_can_extend_write function in fs/nfs/write.c in the Linux kernel before 3.13.3 relies on a write delegation to extend a write operation without a certain up-to-date verification, which allows local users to obtain sensitive information from kernel memory in opportunistic circumstances by writing to a file in an NFS filesystem and then reading the same file.

• CWE-200

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=263b4509ec4d47e0da3e753f85a39ea12d1eff24
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.13.3Release Notes, Vendor Advisory
• http://www.openwall.com/lists/oss-security/2014/02/20/16Mailing List, Third Party Advisory
• http://www.ubuntu.com/usn/USN-2137-1Third Party Advisory
• http://www.ubuntu.com/usn/USN-2140-1Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1066939Issue Tracking, Patch, Third Party Advisory
• https://github.com/torvalds/linux/commit/263b4509ec4d47e0da3e753f85a39ea12d1eff24Patch, Third Party Advisory
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=263b4509ec4d47e0da3e753f85a39ea12d1eff24
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.13.3Release Notes, Vendor Advisory
• http://www.openwall.com/lists/oss-security/2014/02/20/16Mailing List, Third Party Advisory
• http://www.ubuntu.com/usn/USN-2137-1Third Party Advisory
• http://www.ubuntu.com/usn/USN-2140-1Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1066939Issue Tracking, Patch, Third Party Advisory
• https://github.com/torvalds/linux/commit/263b4509ec4d47e0da3e753f85a39ea12d1eff24Patch, Third Party Advisory

Published

Feb 28, 2014

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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