CVE-2012-2390
First published: Wed May 23 2012(Updated: )
Description of problem: When called for anonymous (non-shared) mappings, hugetlb_reserve_pages() does a resv_map_alloc(). It depends on code in hugetlbfs's vm_ops->close() to release that allocation. However, in the mmap() failure path, we do a plain unmap_region() without the remove_vma() which actually calls vm_ops->close(). An unprivileged local user could use this flaw to crash the system. References: <a href="http://www.spinics.net/lists/linux-mm/msg34763.html">http://www.spinics.net/lists/linux-mm/msg34763.html</a> Proposed upstream fix: <a href="https://lkml.org/lkml/2012/5/21/385">https://lkml.org/lkml/2012/5/21/385</a>
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <=3.4.1 | |
| Linux Linux kernel | =3.4 | |
| Linux Linux kernel | =3.4-rc1 | |
| Linux Linux kernel | =3.4-rc2 | |
| Linux Linux kernel | =3.4-rc3 | |
| Linux Linux kernel | =3.4-rc4 | |
| Linux Linux kernel | =3.4-rc5 | |
| Linux Linux kernel | =3.4-rc6 | |
| Linux Linux kernel | =3.4-rc7 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.7-1 6.11.9-1 |
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Reference Links
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=c50ac050811d6485616a193eb0f37bfbd191cc89
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.2
- http://www.openwall.com/lists/oss-security/2012/05/23/14
- http://www.ubuntu.com/usn/USN-1515-1
- http://www.ubuntu.com/usn/USN-1535-1
- https://bugzilla.redhat.com/show_bug.cgi?id=824345
- https://github.com/torvalds/linux/commit/c50ac050811d6485616a193eb0f37bfbd191cc89
- https://launchpad.net/bugs/cve/CVE-2012-2390
- http://www.spinics.net/lists/linux-mm/msg34763.html
- https://lkml.org/lkml/2012/5/21/385
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=824352
- https://rhn.redhat.com/errata/RHSA-2012-1150.html
- https://rhn.redhat.com/errata/RHSA-2012-1304.html
- https://security-tracker.debian.org/tracker/CVE-2012-2390
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2390
- https://nvd.nist.gov/vuln/detail/CVE-2012-2390
- https://ubuntu.com/security/CVE-2012-2390
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