CVE-2012-4508 json
Race condition in fs/ext4/extents.c in the Linux kernel before 3.4.16 allows local users to obtain sensitive information from a deleted fil…
published 2012-12-21 13 y ago modified 2026-06-16 4 mo ago also EUVD-2012-4437
- cvss
- 1.9
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
Summary
Race condition in fs/ext4/extents.c in the Linux kernel before 3.4.16 allows local users to obtain sensitive information from a deleted file by reading an extent that was not properly marked as uninitialized.
Patch / fix
- linux Debian 14, Debian 13, Debian 12 3.2.35-1
debian advisories DEBIAN-CVE-2012-4508
- kernel RHEL 5 2.6.18-308.24.1.el5
- kernel-PAE RHEL 5 2.6.18-308.24.1.el5
- kernel-xen RHEL 5 2.6.18-308.24.1.el5
- kernel-kdump RHEL 5 2.6.18-308.24.1.el5
- kernel-debuginfo-common RHEL 5 2.6.18-308.24.1.el5
- kernel RHEL 6 2.6.32-358.el6
- perf RHEL 6 2.6.32-358.el6
- python-perf RHEL 6 2.6.32-358.el6
red hat advisories RHSA-2012:1540RHSA-2013:0496RHSA-2013:1783RHSA-2013:1519RHSA-2012:1491
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2012-4508 updated cvss 4.9
kernel: ext4: AIO vs fallocate stale data exposure
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Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-308.24.1.el5, kernel-PAE 2.6.18-308.24.1.el5, kernel-xen 2.6.18-308.24.1.el5, kernel-kdump 2.6.18-308.24.1.el5, kernel-debuginfo-common 2.6.18-308.24.1.el5fixed: vendor fix RHSA-2012:1540
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Red Hat Enterprise Linux Compute Node EUS (v. 6.2) perf 2.6.32-220.45.1.el6, kernel 2.6.32-220.45.1.el6, python-perf 2.6.32-220.45.1.el6, kernel-kdump 2.6.32-220.45.1.el6, kernel-firmware 2.6.32-220.45.1.el6, kernel-bootwrapper 2.6.32-220.45.1.el6, +4 morefixed: vendor fix RHSA-2013:1519
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Red Hat Enterprise Linux Compute Node EUS (v. 6.3) perf 2.6.32-279.39.1.el6, kernel 2.6.32-279.39.1.el6, python-perf 2.6.32-279.39.1.el6, kernel-kdump 2.6.32-279.39.1.el6, kernel-firmware 2.6.32-279.39.1.el6, kernel-bootwrapper 2.6.32-279.39.1.el6, +4 morefixed: vendor fix RHSA-2013:1783
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Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.2) perf 2.6.32-220.45.1.el6, kernel 2.6.32-220.45.1.el6, python-perf 2.6.32-220.45.1.el6, kernel-kdump 2.6.32-220.45.1.el6, kernel-firmware 2.6.32-220.45.1.el6, kernel-bootwrapper 2.6.32-220.45.1.el6, +4 morefixed: vendor fix RHSA-2013:1519
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Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.3) perf 2.6.32-279.39.1.el6, kernel 2.6.32-279.39.1.el6, python-perf 2.6.32-279.39.1.el6, kernel-kdump 2.6.32-279.39.1.el6, kernel-firmware 2.6.32-279.39.1.el6, kernel-bootwrapper 2.6.32-279.39.1.el6, +4 morefixed: vendor fix RHSA-2013:1783
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Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-308.24.1.el5, kernel-PAE 2.6.18-308.24.1.el5, kernel-xen 2.6.18-308.24.1.el5, kernel-kdump 2.6.18-308.24.1.el5, kernel-debuginfo-common 2.6.18-308.24.1.el5fixed: vendor fix RHSA-2012:1540
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Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-358.el6, kernel 2.6.32-358.el6, python-perf 2.6.32-358.el6, kernel-kdump 2.6.32-358.el6, kernel-firmware 2.6.32-358.el6, kernel-bootwrapper 2.6.32-358.el6, +4 more Red Hat Enterprise Linux Desktop Optional (v. 6) perf 2.6.32-358.el6, kernel 2.6.32-358.el6, python-perf 2.6.32-358.el6, kernel-kdump 2.6.32-358.el6, kernel-firmware 2.6.32-358.el6, kernel-bootwrapper 2.6.32-358.el6, +4 more Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-358.el6, kernel 2.6.32-358.el6, python-perf 2.6.32-358.el6, kernel-kdump 2.6.32-358.el6, kernel-firmware 2.6.32-358.el6, kernel-bootwrapper 2.6.32-358.el6, +4 more Red Hat Enterprise Linux HPC Node Optional (v. 6) perf 2.6.32-358.el6, kernel 2.6.32-358.el6, python-perf 2.6.32-358.el6, kernel-kdump 2.6.32-358.el6, kernel-firmware 2.6.32-358.el6, kernel-bootwrapper 2.6.32-358.el6, +4 more Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-358.el6, kernel 2.6.32-358.el6, python-perf 2.6.32-358.el6, kernel-kdump 2.6.32-358.el6, kernel-firmware 2.6.32-358.el6, kernel-bootwrapper 2.6.32-358.el6, +4 morefixed: vendor fix RHSA-2013:0496
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Red Hat Enterprise Linux Server EUS (v. 6.2) perf 2.6.32-220.45.1.el6, kernel 2.6.32-220.45.1.el6, python-perf 2.6.32-220.45.1.el6, kernel-kdump 2.6.32-220.45.1.el6, kernel-firmware 2.6.32-220.45.1.el6, kernel-bootwrapper 2.6.32-220.45.1.el6, +4 morefixed: vendor fix RHSA-2013:1519
show 6 moreshow fewer
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Red Hat Enterprise Linux Server EUS (v. 6.3) perf 2.6.32-279.39.1.el6, kernel 2.6.32-279.39.1.el6, python-perf 2.6.32-279.39.1.el6, kernel-kdump 2.6.32-279.39.1.el6, kernel-firmware 2.6.32-279.39.1.el6, kernel-bootwrapper 2.6.32-279.39.1.el6, +4 morefixed: vendor fix RHSA-2013:1783
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Red Hat Enterprise Linux Server Optional (v. 6) perf 2.6.32-358.el6, kernel 2.6.32-358.el6, python-perf 2.6.32-358.el6, kernel-kdump 2.6.32-358.el6, kernel-firmware 2.6.32-358.el6, kernel-bootwrapper 2.6.32-358.el6, +4 morefixed: vendor fix RHSA-2013:0496
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Red Hat Enterprise Linux Server Optional EUS (v. 6.2) perf 2.6.32-220.45.1.el6, kernel 2.6.32-220.45.1.el6, python-perf 2.6.32-220.45.1.el6, kernel-kdump 2.6.32-220.45.1.el6, kernel-firmware 2.6.32-220.45.1.el6, kernel-bootwrapper 2.6.32-220.45.1.el6, +4 morefixed: vendor fix RHSA-2013:1519
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Red Hat Enterprise Linux Server Optional EUS (v. 6.3) perf 2.6.32-279.39.1.el6, kernel 2.6.32-279.39.1.el6, python-perf 2.6.32-279.39.1.el6, kernel-kdump 2.6.32-279.39.1.el6, kernel-firmware 2.6.32-279.39.1.el6, kernel-bootwrapper 2.6.32-279.39.1.el6, +4 morefixed: vendor fix RHSA-2013:1783
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Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-358.el6, kernel 2.6.32-358.el6, python-perf 2.6.32-358.el6, kernel-kdump 2.6.32-358.el6, kernel-firmware 2.6.32-358.el6, kernel-bootwrapper 2.6.32-358.el6, +4 more Red Hat Enterprise Linux Workstation Optional (v. 6) perf 2.6.32-358.el6, kernel 2.6.32-358.el6, python-perf 2.6.32-358.el6, kernel-kdump 2.6.32-358.el6, kernel-firmware 2.6.32-358.el6, kernel-bootwrapper 2.6.32-358.el6, +4 morefixed: vendor fix RHSA-2013:0496
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Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.2.33-rt50.66.el6rt, mrg-rt-release 3.2.33-rt50.66.el6rt, kernel-rt-trace 3.2.33-rt50.66.el6rt, kernel-rt-vanilla 3.2.33-rt50.66.el6rt, kernel-rt-firmware 3.2.33-rt50.66.el6rt, kernel-rt-debuginfo-common-x86_64 3.2.33-rt50.66.el6rtfixed: vendor fix RHSA-2012:1491
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 1.9 | AV:L/AC:M/Au:N/C:P/I:N/A:N |
Classification
- Weakness
-
- CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
- Technology feeds
References
-
github.com
/torvalds/linux/commit/dee1f973ca341c266229faa5a1a5bb268bed3531
patch
-
rhn.redhat.com
/errata/RHSA-2012-1540.html
vendor-advisory
-
rhn.redhat.com
/errata/RHSA-2013-0496.html
vendor-advisory
-
rhn.redhat.com
/errata/RHSA-2013-1783.html
vendor-advisory
-
ubuntu.com
/usn/USN-1645-1
vendor-advisory
-
ubuntu.com
/usn/USN-1899-1
vendor-advisory
-
rhn.redhat.com
/errata/RHSA-2013-1519.html
vendor-advisory
-
suse.com
/support/update/announcement/2012/suse-su-20121679-1.html
vendor-advisory
-
lists.fedoraproject.org
/pipermail/package-announce/2012-November/091110.html
vendor-advisory
-
ubuntu.com
/usn/USN-1900-1
vendor-advisory
- git.kernel.org /?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=dee1f973ca341c266229faa5a1a5bb268bed3531
- kernel.org /pub/linux/kernel/v3.x/ChangeLog-3.4.16
- bugzilla.redhat.com /show_bug.cgi?id=869904
-
openwall.com
/lists/oss-security/2012/10/25/1
mailing-list
Sources
- CVE List CVE-2012-4508
- NVD CVE-2012-4508
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.