Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 3.2.35-1 | — |
| Debian 13 | linux | 3.2.35-1 | — |
| Debian 12 | linux | 3.2.35-1 | — |
| Debian 6.0 | linux-2.6 | 2.6.32-48squeeze3 | DSA-2668-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +15 | 2.6.32-358.el6 | RHSA-2013:0496 |
| RHEL 5 | kernel +12 | 2.6.18-308.24.1.el5 | RHSA-2012:1540 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6.3 EUS | perf +15 | 2.6.32-279.39.1.el6 | RHSA-2013:1783 |
| RHEL 6.2 EUS | perf +15 | 2.6.32-220.45.1.el6 | RHSA-2013:1519 |
| Red Hat MRG 2 | kernel-rt +11 | 3.2.33-rt50.66.el6rt | RHSA-2012:1491 |
Advisories 6
- RHSA-2012:1491 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jul 20, 2026
- RHSA-2013:1783 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2013:1519 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2013:0496 Red Hat Security Advisory: Red Hat Enterprise Linux 6 kernel update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2012:1540 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2668-1 linux-2.6 - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=dee1f973ca341c266229faa5a1a5bb268bed3531
- RHSA-2012:1540 vendor-advisory
- RHSA-2013:0496 vendor-advisory
- RHSA-2013:1783 vendor-advisory
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.16
- USN-1645-1 vendor-advisory
- USN-1899-1 vendor-advisory
- RHSA-2013:1519 vendor-advisory
- SUSE-SU-2012:1679 vendor-advisory
- https://github.com/torvalds/linux/commit/dee1f973ca341c266229faa5a1a5bb268bed3531
- FEDORA-2012-17479 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=869904
- [oss-security] 20121025 CVE-2012-4508 -- kernel: ext4: AIO vs fallocate stale data exposure mailing-list
- USN-1900-1 vendor-advisory