Description
fs/btrfs/inode.c in the Linux kernel before 4.3.3 mishandles compressed inline extents, which allows local users to obtain sensitive pre-truncation information from a file via a clone action.
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 | 4.2.6-2 | — |
| Debian 13 | linux | 4.2.6-2 | — |
| Debian 12 | linux | 4.2.6-2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux | 3.13.0-77.121 | USN-2887-1 |
| Ubuntu 14.04 LTS | linux-lts-utopic | 3.16.0-60.80~14.04.1 | USN-2888-1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-49.55~14.04.1 | USN-2889-2 |
| Ubuntu 14.04 LTS | linux-lts-wily | 4.2.0-27.32~14.04.1 | USN-2890-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-rt +10 | 3.10.0-514.rt56.420.el7 | RHSA-2016:2584 |
| RHEL 7 | perf +18 | 3.10.0-514.el7 | RHSA-2016:2574 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.11.2.el6uek | 0.4.5-3.el6 | ELSA-2016-3617 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.11.2.el7uek | 0.4.5-3.el7 | ELSA-2016-3617 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.11.2.el7uek | ELSA-2016-3617 |
| Oracle Linux 7 | perf +11 | 3.10.0-514.el7 | ELSA-2016-2574 |
Advisories 8
- RHSA-2016:2584 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:2574 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-2887-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-2888-1 linux-lts-utopic vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-2889-2 linux-lts-vivid vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-2890-2 linux-lts-wily vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- ELSA-2016-2574 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 9, 2016
- ELSA-2016-3617 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 22, 2016
References
- 1034895 vdb-entry
- https://github.com/torvalds/linux/commit/0305cd5f7fca85dae392b9ba85b116896eb7c1c7
- USN-2887-2 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- [oss-security] 20151127 CVE request: Linux kernel, information disclosure after file truncate on BTRFS mailing-list
- USN-2886-1 vendor-advisory
- USN-2887-1 vendor-advisory
- USN-2890-3 vendor-advisory
- RHSA-2016:2584 vendor-advisory
- USN-2889-1 vendor-advisory
- RHSA-2016:2574 vendor-advisory
- USN-2889-2 vendor-advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.3
- https://bugzilla.redhat.com/show_bug.cgi?id=1286261
- 78219 vdb-entry
- USN-2890-2 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
- DSA-3426 vendor-advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0305cd5f7fca85dae392b9ba85b116896eb7c1c7
- USN-2890-1 vendor-advisory
- USN-2888-1 vendor-advisory