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Fencer Intel
medium 5.5

CVE-2020-10720 json

A flaw was found in the Linux kernel's implementation of GRO in versions before 5.2.

published 6y ago modified 4mo ago also EUVD-2020-3148

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits
0
none known

Summary

A flaw was found in the Linux kernel's implementation of GRO in versions before 5.2. This flaw allows an attacker with local access to crash the system.

Patch / fix

  • linux linux_kernel 5.2
  • linux Debian 14, Debian 13, Debian 12 5.2.6-1

debian advisories DEBIAN-CVE-2020-10720

  • linux Ubuntu 16.04 LTS 4.4.0-157.185
  • linux Ubuntu 18.04 LTS 4.15.0-60.67
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1090.101
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1047.49
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1041.43
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-60.67~16.04.1
  • linux-hwe Ubuntu 18.04 LTS 5.0.0-27.28~18.04.1
  • linux-kvm Ubuntu 16.04 LTS 4.4.0-1052.59

ubuntu advisories UBUNTU-CVE-2020-10720

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-alt RHEL 7 4.14.0-115.26.1.el7a
  • perf RHEL 7 4.14.0-115.26.1.el7a
  • kernel RHEL 7 4.14.0-115.26.1.el7a
  • python-perf RHEL 7 4.14.0-115.26.1.el7a
  • kernel-tools RHEL 7 4.14.0-115.26.1.el7a
  • kernel-tools-libs RHEL 7 4.14.0-115.26.1.el7a
  • kernel-bootwrapper RHEL 7 4.14.0-115.26.1.el7a
  • kernel-abi-whitelists RHEL 7 4.14.0-115.26.1.el7a

red hat advisories RHSA-2020:2854RHSA-2019:3517RHSA-2019:3309

  • kernel-rt Real Time Module 15 SP1 4.12.14-14.28.1
  • kernel-syms-rt Real Time Module 15 SP1 4.12.14-14.28.1
  • kernel-rt_debug Real Time Module 15 SP1 4.12.14-14.28.1
  • kernel-source-rt Real Time Module 15 SP1 4.12.14-14.28.1
  • kernel-rt SLE Real Time 12 SP5 4.12.14-10.13.1
  • kernel-syms-rt SLE Real Time 12 SP5 4.12.14-10.13.1
  • kernel-rt_debug SLE Real Time 12 SP5 4.12.14-10.13.1
  • kernel-source-rt SLE Real Time 12 SP5 4.12.14-10.13.1

suse advisories SUSE-SU-2020:2487-1SUSE-SU-2020:2478-1SUSE-SU-2020:2156-1SUSE-SU-2020:1663-1SUSE-SU-2020:1605-1SUSE-SU-2020:1604-1

  • kernel-syms openSUSE Leap 15.1 4.12.14-lp151.28.52.1
  • kernel-obs-qa openSUSE Leap 15.1 4.12.14-lp151.28.52.3
  • kernel-source openSUSE Leap 15.1 4.12.14-lp151.28.52.1
  • kernel-default openSUSE Leap 15.1 4.12.14-lp151.28.52.1
  • kernel-vanilla openSUSE Leap 15.1 4.12.14-lp151.28.52.1
  • kernel-kvmsmall openSUSE Leap 15.1 4.12.14-lp151.28.52.1
  • kernel-obs-build openSUSE Leap 15.1 4.12.14-lp151.28.52.3

opensuse advisories openSUSE-SU-2020:0801-1

Is CVE-2020-10720 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-10720 updated cvss 5.3

kernel: use-after-free read in napi_gro_frags() in the Linux kernel

  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    affected: workaround, no fix planned “Disabling GSO on the cards using ethtool will prevent this codepath from being taken.”
  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-147.el8, kernel-debuginfo-common-aarch64 4.18.0-147.el8, kernel-debuginfo-common-ppc64le 4.18.0-147.el8 Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-147.el8, kernel 4.18.0-147.el8, bpftool 4.18.0-147.el8, kernel-core 4.18.0-147.el8, kernel-tools 4.18.0-147.el8, python3-perf 4.18.0-147.el8, +15 more
    fixed: vendor fix “Disabling GSO on the cards using ethtool will prevent this codepath from being taken.” RHSA-2019:3517
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) perf 4.14.0-115.26.1.el7a, kernel 4.14.0-115.26.1.el7a, kernel-alt 4.14.0-115.26.1.el7a, python-perf 4.14.0-115.26.1.el7a, kernel-tools 4.14.0-115.26.1.el7a, kernel-tools-libs 4.14.0-115.26.1.el7a, +3 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debuginfo-common-ppc64le 4.14.0-115.26.1.el7a
    fixed: vendor fix “Disabling GSO on the cards using ethtool will prevent this codepath from being taken.” RHSA-2020:2854
  • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-147.rt24.93.el8, kernel-rt-core 4.18.0-147.rt24.93.el8, kernel-rt-modules 4.18.0-147.rt24.93.el8, kernel-rt-debug-core 4.18.0-147.rt24.93.el8, kernel-rt-debug-modules 4.18.0-147.rt24.93.el8, kernel-rt-modules-extra 4.18.0-147.rt24.93.el8, +2 more Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-147.rt24.93.el8, kernel-rt-kvm 4.18.0-147.rt24.93.el8, kernel-rt-core 4.18.0-147.rt24.93.el8, kernel-rt-modules 4.18.0-147.rt24.93.el8, kernel-rt-debug-kvm 4.18.0-147.rt24.93.el8, kernel-rt-debug-core 4.18.0-147.rt24.93.el8, +4 more
    fixed: vendor fix “Disabling GSO on the cards using ethtool will prevent this codepath from being taken.” RHSA-2019:3309
  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) kernel-headers 4.14.0-115.26.1.el7a Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C

Affected products

  • n/a Kernel

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.