CVE-2020-9391

An issue was discovered in the Linux kernel 5.4 and 5.5 through 5.5.6 on the AArch64 architecture. It ignores the top byte in the address passed to the brk system call, potentially moving the memory break downwards when the application expects it to move upwards, aka CID-dcde237319e6. This has been observed to cause heap corruption with the GNU C Library malloc implementation.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
mitreCNA
---
---
CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 38%
VendorProductVersion
linuxlinux_kernel
5.5 ≤
𝑥
≤ 5.5.6
linuxlinux_kernel
5.4
netappactive_iq_unified_manager
-
netappcloud_backup
-
netappdata_availability_services
-
netapphci_management_node
-
netappsolidfire
-
netappsteelstore_cloud_integrated_storage
-
netapph410c_firmware
-
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bullseye
5.10.223-1
fixed
buster
not-affected
stretch
not-affected
jessie
not-affected
bullseye (security)
5.10.226-1
fixed
bookworm
6.1.106-3
fixed
bookworm (security)
6.1.112-1
fixed
sid
6.11.5-1
fixed
trixie
6.11.5-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
linux
focal
not-affected
eoan
not-affected
bionic
not-affected
xenial
not-affected
trusty
not-affected
linux-aws
focal
not-affected
eoan
not-affected
bionic
not-affected
xenial
not-affected
trusty
not-affected
linux-aws-5.0
focal
dne
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-aws-hwe
focal
dne
eoan
dne
bionic
dne
xenial
not-affected
trusty
dne
linux-azure
focal
not-affected
eoan
not-affected
bionic
not-affected
xenial
not-affected
trusty
not-affected
linux-azure-5.3
focal
dne
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-azure-edge
focal
dne
eoan
dne
bionic
ignored
xenial
ignored
trusty
dne
linux-gcp
focal
not-affected
eoan
not-affected
bionic
not-affected
xenial
not-affected
trusty
dne
linux-gcp-5.3
focal
dne
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gcp-edge
focal
dne
eoan
dne
bionic
ignored
xenial
dne
trusty
dne
linux-gke-4.15
focal
dne
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gke-5.0
focal
dne
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gke-5.3
focal
dne
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-hwe
focal
dne
eoan
dne
bionic
not-affected
xenial
not-affected
trusty
dne
linux-hwe-edge
focal
dne
eoan
dne
bionic
ignored
xenial
ignored
trusty
dne
linux-kvm
focal
not-affected
eoan
not-affected
bionic
not-affected
xenial
not-affected
trusty
dne
linux-lts-trusty
focal
dne
eoan
dne
bionic
dne
xenial
dne
trusty
dne
linux-lts-xenial
focal
dne
eoan
dne
bionic
dne
xenial
dne
trusty
not-affected
linux-oem
focal
dne
eoan
not-affected
bionic
not-affected
xenial
ignored
trusty
dne
linux-oem-5.6
focal
not-affected
eoan
dne
bionic
dne
xenial
dne
trusty
dne
linux-oem-osp1
focal
dne
eoan
not-affected
bionic
not-affected
xenial
dne
trusty
dne
linux-oracle
focal
not-affected
eoan
not-affected
bionic
not-affected
xenial
not-affected
trusty
dne
linux-oracle-5.0
focal
dne
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-oracle-5.3
focal
dne
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-raspi2
focal
ignored
eoan
not-affected
bionic
not-affected
xenial
not-affected
trusty
dne
linux-raspi2-5.3
focal
dne
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-snapdragon
focal
dne
eoan
dne
bionic
not-affected
xenial
not-affected
trusty
dne
Common Weakness Enumeration
References
http://www.openwall.com/lists/oss-security/2020/02/25/6
https://bugzilla.redhat.com/show_bug.cgi?id=1797052
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dcde237319e626d1ec3c9d8b7613032f0fd4663a
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O4LH35HOPBJIKYHYFXMBBM75DN75PZHZ/
https://security.netapp.com/advisory/ntap-20200313-0003/
http://www.openwall.com/lists/oss-security/2020/02/25/6
https://bugzilla.redhat.com/show_bug.cgi?id=1797052
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dcde237319e626d1ec3c9d8b7613032f0fd4663a
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O4LH35HOPBJIKYHYFXMBBM75DN75PZHZ/
https://security.netapp.com/advisory/ntap-20200313-0003/