CVE-2015-8952

The mbcache feature in the ext2 and ext4 filesystem implementations in the Linux kernel before 4.6 mishandles xattr block caching, which allows local users to cause a denial of service (soft lockup) via filesystem operations in environments that use many attributes, as demonstrated by Ceph and Samba.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
mitreCNA
---
---
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 23%
VendorProductVersion
linuxlinux_kernel
𝑥
≤ 4.5.7
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bullseye
5.10.223-1
fixed
jessie
ignored
wheezy
no-dsa
bullseye (security)
5.10.226-1
fixed
bookworm
6.1.106-3
fixed
bookworm (security)
6.1.112-1
fixed
trixie
6.11.5-1
fixed
sid
6.11.6-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
linux
noble
not-affected
jammy
not-affected
focal
not-affected
eoan
not-affected
disco
not-affected
cosmic
not-affected
bionic
not-affected
artful
not-affected
zesty
not-affected
yakkety
not-affected
xenial
Fixed 4.4.0-116.140
released
trusty
ignored
precise
ignored
linux-armadaxp
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
dne
precise
ignored
linux-aws
noble
not-affected
jammy
not-affected
focal
not-affected
eoan
not-affected
disco
not-affected
cosmic
not-affected
bionic
not-affected
artful
dne
zesty
dne
yakkety
dne
xenial
Fixed 4.4.0-1052.61
released
trusty
Fixed 4.4.0-1014.14
released
precise
dne
linux-aws-5.15
noble
dne
jammy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-aws-5.4
noble
dne
jammy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-aws-fips
noble
dne
jammy
dne
focal
dne
bionic
dne
xenial
ignored
trusty
dne
linux-aws-hwe
noble
dne
jammy
dne
focal
dne
eoan
dne
disco
dne
cosmic
dne
bionic
dne
xenial
not-affected
trusty
dne
linux-azure
noble
not-affected
jammy
not-affected
focal
not-affected
eoan
not-affected
disco
not-affected
cosmic
not-affected
bionic
not-affected
artful
dne
zesty
dne
yakkety
dne
xenial
not-affected
trusty
not-affected
linux-azure-4.15
noble
dne
jammy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-azure-5.15
noble
dne
jammy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-azure-5.4
noble
dne
jammy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-azure-edge
noble
dne
jammy
dne
focal
dne
eoan
dne
disco
dne
cosmic
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-azure-fde
noble
dne
jammy
not-affected
focal
ignored
bionic
dne
xenial
dne
trusty
dne
linux-azure-fde-5.15
noble
dne
jammy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-azure-fips
noble
dne
jammy
dne
focal
dne
bionic
dne
xenial
ignored
trusty
dne
linux-bluefield
noble
dne
jammy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-euclid
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
xenial
ignored
trusty
dne
linux-fips
noble
dne
jammy
dne
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-flo
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
ignored
xenial
ignored
trusty
dne
precise
dne
linux-gcp
noble
not-affected
jammy
not-affected
focal
not-affected
eoan
not-affected
disco
not-affected
cosmic
not-affected
bionic
not-affected
artful
dne
zesty
dne
yakkety
dne
xenial
not-affected
trusty
dne
linux-gcp-4.15
noble
dne
jammy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gcp-5.15
noble
dne
jammy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-gcp-5.4
noble
dne
jammy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gcp-edge
eoan
dne
disco
dne
cosmic
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gcp-fips
noble
dne
jammy
dne
focal
dne
bionic
dne
xenial
ignored
trusty
dne
linux-gke
noble
not-affected
jammy
not-affected
focal
ignored
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
ignored
trusty
dne
precise
dne
linux-gkeop
noble
dne
jammy
not-affected
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-gkeop-5.15
noble
dne
jammy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-goldfish
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
ignored
yakkety
ignored
xenial
ignored
trusty
dne
precise
dne
linux-grouper
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
dne
precise
dne
linux-hwe
noble
dne
jammy
dne
focal
dne
eoan
dne
disco
dne
cosmic
dne
bionic
not-affected
artful
dne
zesty
dne
yakkety
dne
xenial
not-affected
trusty
dne
precise
dne
linux-hwe-5.15
noble
dne
jammy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-hwe-5.4
noble
dne
jammy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-hwe-6.8
noble
dne
jammy
not-affected
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-hwe-edge
noble
dne
jammy
dne
focal
dne
eoan
dne
disco
dne
cosmic
dne
bionic
not-affected
artful
dne
zesty
dne
yakkety
dne
xenial
not-affected
trusty
dne
precise
dne
linux-ibm
noble
not-affected
jammy
not-affected
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-ibm-5.15
noble
dne
jammy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-ibm-5.4
noble
dne
jammy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-intel
noble
not-affected
jammy
dne
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-intel-iot-realtime
noble
dne
jammy
dne
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-intel-iotg
noble
dne
jammy
not-affected
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-intel-iotg-5.15
noble
dne
jammy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-iot
noble
dne
jammy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-kvm
noble
dne
jammy
not-affected
focal
not-affected
eoan
not-affected
disco
not-affected
cosmic
not-affected
bionic
not-affected
artful
dne
zesty
dne
xenial
Fixed 4.4.0-1019.24
released
trusty
dne
linux-linaro-omap
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
dne
precise
ignored
linux-linaro-shared
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
dne
precise
ignored
linux-linaro-vexpress
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
dne
precise
ignored
linux-lowlatency
noble
not-affected
jammy
not-affected
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-lowlatency-hwe-5.15
noble
dne
jammy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-lowlatency-hwe-6.8
noble
dne
jammy
not-affected
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-lts-quantal
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
dne
precise
ignored
linux-lts-raring
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
dne
precise
ignored
linux-lts-saucy
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
dne
precise
ignored
linux-lts-trusty
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
dne
precise
ignored
linux-lts-utopic
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
ignored
precise
dne
linux-lts-vivid
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
ignored
precise
dne
linux-lts-wily
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
ignored
precise
dne
linux-lts-xenial
noble
dne
jammy
dne
focal
dne
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
Fixed 4.4.0-116.140~14.04.1
released
precise
dne
linux-maguro
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
dne
precise
dne
linux-mako
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
ignored
xenial
ignored
trusty
dne
precise
dne
linux-manta
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
dne
precise
dne
linux-nvidia
noble
not-affected
jammy
not-affected
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-nvidia-6.5
noble
dne
jammy
not-affected
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-nvidia-6.8
noble
dne
jammy
not-affected
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-nvidia-lowlatency
noble
not-affected
jammy
dne
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-oem
noble
dne
jammy
dne
focal
dne
eoan
not-affected
disco
not-affected
cosmic
not-affected
bionic
not-affected
artful
dne
zesty
dne
xenial
not-affected
trusty
dne
linux-oem-6.8
noble
not-affected
jammy
dne
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-oracle
noble
not-affected
jammy
not-affected
focal
not-affected
eoan
not-affected
disco
not-affected
cosmic
not-affected
bionic
not-affected
xenial
not-affected
trusty
dne
linux-oracle-5.15
noble
dne
jammy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-oracle-5.4
noble
dne
jammy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-qcm-msm
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
dne
precise
ignored
linux-raspi
noble
not-affected
jammy
not-affected
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-raspi-5.4
noble
dne
jammy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-raspi-realtime
noble
dne
jammy
dne
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-raspi2
noble
dne
jammy
dne
focal
ignored
eoan
not-affected
disco
not-affected
cosmic
not-affected
bionic
not-affected
artful
not-affected
zesty
not-affected
yakkety
not-affected
xenial
Fixed 4.4.0-1085.93
released
trusty
dne
precise
dne
linux-realtime
noble
dne
jammy
ignored
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-riscv
noble
not-affected
jammy
ignored
focal
ignored
bionic
dne
xenial
dne
trusty
dne
linux-riscv-5.15
noble
dne
jammy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-riscv-6.8
noble
dne
jammy
not-affected
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-snapdragon
noble
dne
jammy
dne
focal
dne
eoan
not-affected
disco
not-affected
cosmic
dne
bionic
Fixed 4.15.0-1053.57
released
artful
Fixed 4.4.0-1088.93
released
zesty
ignored
yakkety
ignored
xenial
Fixed 4.4.0-1087.92
released
trusty
dne
precise
dne
linux-ti-omap4
eoan
dne
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
dne
precise
ignored
linux-xilinx-zynqmp
noble
dne
jammy
not-affected
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
Common Weakness Enumeration
References
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac
http://www.openwall.com/lists/oss-security/2016/08/22/2
http://www.openwall.com/lists/oss-security/2016/08/25/4
https://bugzilla.kernel.org/show_bug.cgi?id=107301
https://bugzilla.redhat.com/show_bug.cgi?id=1360968
https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272
https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee
https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac
https://lwn.net/Articles/668718/
https://usn.ubuntu.com/3582-1/
https://usn.ubuntu.com/3582-2/
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac
http://www.openwall.com/lists/oss-security/2016/08/22/2
http://www.openwall.com/lists/oss-security/2016/08/25/4
https://bugzilla.kernel.org/show_bug.cgi?id=107301
https://bugzilla.redhat.com/show_bug.cgi?id=1360968
https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272
https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee
https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac
https://lwn.net/Articles/668718/
https://usn.ubuntu.com/3582-1/
https://usn.ubuntu.com/3582-2/