Buffer overflow in Linux kernel - CVE-2020-12465

Vulnerability identifier: #VU34414

CSH Severity: Low

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-12465

CWE-ID: CWE-120

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local privileged user to execute arbitrary code.

An array overflow was discovered in mt76_add_fragment in drivers/net/wireless/mediatek/mt76/dma.c in the Linux kernel before 5.5.10, aka CID-b102f0c522cf. An oversized packet with too many rx fragments can corrupt memory of adjacent pages.

Linux kernel
Anolis OS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
kernel (Red Hat package)
kernel-debug-core
python3-perf
perf
kernel-tools-libs-devel
kernel-tools-libs
kernel-tools
kernel-modules-internal
kernel-modules-extra
kernel-modules
kernel-headers
kernel-devel
kernel-debug-modules-extra
kernel-debug-modules
kernel-debug-devel
bpftool
kernel-debug
kernel-core
kernel
python-perf

Install update from vendor's website.

Linux kernel - update to 5.5.10
kernel (Red Hat package) - update to 4.18.0-240.el8
kernel-debug-core - update to 4.19.91-26
python3-perf - update to 4.19.91-26
perf - update to 4.19.91-26
kernel-tools-libs-devel - update to 4.19.91-26
kernel-tools-libs - update to 4.19.91-26
kernel-tools - update to 4.19.91-26
kernel-modules-internal - update to 4.19.91-26
kernel-modules-extra - update to 4.19.91-26
kernel-modules - update to 4.19.91-26
kernel-headers - update to 4.19.91-26
kernel-devel - update to 4.19.91-26
kernel-debug-modules-extra - update to 4.19.91-26
kernel-debug-modules - update to 4.19.91-26
kernel-debug-devel - update to 4.19.91-26
bpftool - update to 4.19.91-26
kernel-debug - update to 4.19.91-26
kernel-core - update to 4.19.91-26
kernel - update to 4.19.91-26
python-perf - update to 4.19.91-26

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.10
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b102f0c522cf668c8382c56a4f771b37d011cda2
• https://github.com/torvalds/linux/commit/b102f0c522cf668c8382c56a4f771b37d011cda2
• https://security.netapp.com/advisory/ntap-20200608-0001/

• Buffer overflow in Linux kernel
• Anolis OS update for kernel(ANCK)4.19
• Anolis OS update for kernel
• Red Hat Enterprise Linux 8 update for kernel