Description
The ext4_zero_range function in fs/ext4/extents.c in the Linux kernel before 4.1 allows local users to cause a denial of service (BUG) via a crafted fallocate zero-range request.
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 | 3.16.7-ckt9-1 | — |
| Debian 13 | linux | 3.16.7-ckt9-1 | — |
| Debian 12 | linux | 3.16.7-ckt9-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux-lts-utopic | 3.16.0-39.53~14.04.1 | USN-2635-1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-20.20~14.04.1 | USN-2636-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-kdump +4 | 3.10.0-229.14.1.el7 | RHSA-2015:1778 |
| RHEL 7 | kernel-rt +7 | 3.10.0-229.14.1.rt56.141.13.el7_1 | RHSA-2015:1788 |
| RHEL 7 | perf +13 | 3.10.0-229.14.1.ael7b | RHSA-2015:1778 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +10 | 1:3.10.0-229.rt56.161.el6rt | RHSA-2015:1787 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | perf +11 | 3.10.0-229.14.1.el7 | ELSA-2015-1778 |
Advisories 6
- RHSA-2015:1788 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2015:1778 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2015:1787 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-2635-1 linux-lts-utopic vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-2636-1 linux-lts-vivid vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- ELSA-2015-1778 Important: kernel security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 15, 2015
References
- 1034454 vdb-entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1193907
- [linux-ext4] 20150218 [PATCH] ext4: Allocate entire range in zero range mailing-list
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0f2af21aae11972fa924374ddcf52e88347cf5a8
- RHSA-2015:1778 vendor-advisory
- RHSA-2015:1787 vendor-advisory
- 75139 vdb-entry
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- https://github.com/torvalds/linux/commit/0f2af21aae11972fa924374ddcf52e88347cf5a8
- [oss-security] 20150223 CVE-2015-0275 -- Linux kernel: fs: ext4: fallocate zero range page size > block size BUG() mailing-list
- https://support.f5.com/csp/article/K05211147