CVE-2011-2479
First published: Mon Jun 20 2011(Updated: )
Description of problem: The huge_memory.c THP page fault was allowed to run if vm_ops was null (which would succeed for /dev/zero MAP_PRIVATE, as the f_op->mmap wouldn't setup a special vma->vm_ops and it would fallback to regular anonymous memory) but other THP logics weren't fully activated for vmas with vm_file not NULL (/dev/zero has a not NULL vma->vm_file). Unprivileged local user could use this flaw to crash the server. Upstream patch: 78f11a255749d09025f54d4e2df4fbcb031530e2 References: <a href="https://bugzilla.kernel.org/show_bug.cgi?id=33682">https://bugzilla.kernel.org/show_bug.cgi?id=33682</a> <a href="http://www.spinics.net/lists/stable-commits/msg11762.html">http://www.spinics.net/lists/stable-commits/msg11762.html</a>
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <2.6.39 | |
| debian/linux-2.6 |
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Reference Links
- https://github.com/torvalds/linux/commit/78f11a255749d09025f54d4e2df4fbcb031530e2
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
- http://www.openwall.com/lists/oss-security/2011/06/20/14
- https://bugzilla.redhat.com/show_bug.cgi?id=714761
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=78f11a255749d09025f54d4e2df4fbcb031530e2
- https://launchpad.net/bugs/cve/CVE-2011-2479
- https://bugzilla.kernel.org/show_bug.cgi?id=33682
- http://www.spinics.net/lists/stable-commits/msg11762.html
- https://rhn.redhat.com/errata/RHSA-2011-0928.html
- http://seclists.org/oss-sec/2011/q2/644
- https://security-tracker.debian.org/tracker/CVE-2011-2479
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2479
- https://nvd.nist.gov/vuln/detail/CVE-2011-2479
- https://ubuntu.com/security/CVE-2011-2479
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