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Fencer Vulns
high 7.8

CVE-2023-52628 json

netfilter: nftables: exthdr: fix 4-byte stack OOB write

published 2024-03-28 2 y ago modified 2026-08-05 3 mo ago also EUVD-2023-57252

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nftables: exthdr: fix 4-byte stack OOB write

If priv->len is a multiple of 4, then dst[len / 4] can write past the destination array which leads to stack corruption.

This construct is necessary to clean the remainder of the register in case ->len is NOT a multiple of the register size, so make it conditional just like nft_payload.c does.

The bug was added in 4.1 cycle and then copied/inherited when tcp/sctp and ip option support was added.

Bug reported by Zero Day Initiative project (ZDI-CAN-21950, ZDI-CAN-21951, ZDI-CAN-21961).

Patch / fix

  • Linux Linux 4.19.316, 5.4.279, 5.10.198, 5.15.132, 6.1.54, 6.5.4, 6.6
  • linux Debian 12 6.1.55-1
  • linux Debian 14, Debian 13 6.5.6-1

debian advisories DEBIAN-CVE-2023-52628

  • linux Ubuntu 20.04 LTS 5.4.0-165.182
  • linux Ubuntu 22.04 LTS 5.15.0-87.97
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1112.121
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1048.53
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1116.125
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1045.53
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1045.50
  • linux-ibm Ubuntu 20.04 LTS 5.4.0-1059.64

ubuntu advisories UBUNTU-CVE-2023-52628

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 RHEL 9 5.14.0-427.13.1.el9_4
  • rv RHEL 9 5.14.0-427.13.1.el9_4
  • perf RHEL 9 5.14.0-427.13.1.el9_4
  • rtla RHEL 9 5.14.0-427.13.1.el9_4
  • bpftool RHEL 9 7.3.0-427.13.1.el9_4
  • libperf RHEL 9 5.14.0-427.13.1.el9_4
  • kernel-rt RHEL 9 5.14.0-427.13.1.el9_4
  • kernel-64k RHEL 9 5.14.0-427.13.1.el9_4

red hat advisories RHSA-2024:2394RHSA-2024:3414RHSA-2024:3421RHSA-2024:2845RHSA-2024:2846

  • kernel-syms SLES for SAP 12 SP5, SLES 12 SP5 4.12.14-122.216.1
  • kernel-source SLES for SAP 12 SP5, SLES 12 SP5 4.12.14-122.216.1
  • kernel-default SLES for SAP 12 SP5, SLES 12 SP5, SLE Workstation Extension 12 SP5 +2 more 4.12.14-122.216.1
  • kernel-obs-build SLE Software Development Kit 12 SP5 4.12.14-122.216.1
  • kernel-rt SLE Micro 5.4, SLE Micro 5.3, openSUSE Leap Micro 5.4 +1 more 5.14.21-150400.15.79.1
  • kernel-source-rt SLE Micro 5.4, SLE Micro 5.3 5.14.21-150400.15.79.1
  • kernel-rt SLE Real Time 12 SP5 4.12.14-10.182.1
  • kernel-syms-rt SLE Real Time 12 SP5 4.12.14-10.182.1

suse advisories SUSE-SU-2024:2217-1SUSE-SU-2024:2216-1SUSE-SU-2024:2164-1SUSE-SU-2024:2156-1SUSE-SU-2024:2124-1SUSE-SU-2024:2109-1

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-2023-52628 updated cvss 7.0

kernel: netfilter: nftables: exthdr: fix 4-byte stack OOB write

  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: workaround, no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.0) kernel-debuginfo-common-s390x 5.14.0-70.101.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.101.1.el9_0, kernel-debuginfo-common-aarch64 5.14.0-70.101.1.el9_0, kernel-debuginfo-common-ppc64le 5.14.0-70.101.1.el9_0
    fixed: vendor fix RHSA-2024:3421
  • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-debuginfo-common-s390x 5.14.0-284.66.1.el9_2, kernel-debuginfo-common-x86_64 5.14.0-284.66.1.el9_2, kernel-debuginfo-common-aarch64 5.14.0-284.66.1.el9_2, kernel-debuginfo-common-ppc64le 5.14.0-284.66.1.el9_2
    fixed: vendor fix RHSA-2024:2845
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-427.13.1.el9_4, perf 5.14.0-427.13.1.el9_4, rtla 5.14.0-427.13.1.el9_4, kernel-devel-matched 5.14.0-427.13.1.el9_4, kernel-64k-devel-matched 5.14.0-427.13.1.el9_4, kernel-debug-devel-matched 5.14.0-427.13.1.el9_4, +6 more
    fixed: vendor fix RHSA-2024:2394
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) perf 5.14.0-70.101.1.el9_0, kernel-devel-matched 5.14.0-70.101.1.el9_0, kernel-debug-devel-matched 5.14.0-70.101.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.101.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.101.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.101.1.el9_0, +2 more
    fixed: vendor fix RHSA-2024:3421
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) perf 5.14.0-284.66.1.el9_2, rtla 5.14.0-284.66.1.el9_2, kernel-devel-matched 5.14.0-284.66.1.el9_2, kernel-64k-devel-matched 5.14.0-284.66.1.el9_2, kernel-debug-devel-matched 5.14.0-284.66.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.66.1.el9_2, +5 more
    fixed: vendor fix RHSA-2024:2845
  • Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.3.0-427.13.1.el9_4, kernel 5.14.0-427.13.1.el9_4, kernel-64k 5.14.0-427.13.1.el9_4, kernel-core 5.14.0-427.13.1.el9_4, kernel-tools 5.14.0-427.13.1.el9_4, python3-perf 5.14.0-427.13.1.el9_4, +28 more
    fixed: vendor fix RHSA-2024:2394
  • Red Hat Enterprise Linux BaseOS EUS (v.9.0) kernel 5.14.0-70.101.1.el9_0, bpftool 5.14.0-70.101.1.el9_0, kernel-core 5.14.0-70.101.1.el9_0, kernel-tools 5.14.0-70.101.1.el9_0, python3-perf 5.14.0-70.101.1.el9_0, kernel-modules 5.14.0-70.101.1.el9_0, +14 more
    fixed: vendor fix RHSA-2024:3421
show 8 more
  • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool 7.0.0-284.66.1.el9_2, kernel 5.14.0-284.66.1.el9_2, kernel-64k 5.14.0-284.66.1.el9_2, kernel-core 5.14.0-284.66.1.el9_2, kernel-tools 5.14.0-284.66.1.el9_2, python3-perf 5.14.0-284.66.1.el9_2, +28 more
    fixed: vendor fix RHSA-2024:2845
  • Red Hat Enterprise Linux CRB (v. 9) libperf 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.13.1.el9_4 Red Hat Enterprise Linux NFV (v. 9) kernel-rt 5.14.0-427.13.1.el9_4, kernel-rt-kvm 5.14.0-427.13.1.el9_4, kernel-rt-core 5.14.0-427.13.1.el9_4, kernel-rt-modules 5.14.0-427.13.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.13.1.el9_4, kernel-rt-debug-core 5.14.0-427.13.1.el9_4, +6 more
    fixed: vendor fix RHSA-2024:2394
  • Red Hat Enterprise Linux Real Time EUS (v.9.0) kernel-rt 5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-core 5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-modules 5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-debug-core 5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-debug-modules 5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-modules-extra 5.14.0-70.101.1.rt21.173.el9_0, +2 more
    fixed: vendor fix RHSA-2024:3414
  • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-core 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-modules 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-debug-core 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-modules-core 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-debug-modules 5.14.0-284.66.1.rt14.351.el9_2, +4 more
    fixed: vendor fix RHSA-2024:2846
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) kernel-rt 5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-kvm 5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-core 5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-modules 5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-debug-kvm 5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-debug-core 5.14.0-70.101.1.rt21.173.el9_0, +4 more
    fixed: vendor fix RHSA-2024:3414
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-kvm 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-core 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-modules 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-debug-kvm 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-debug-core 5.14.0-284.66.1.rt14.351.el9_2, +6 more
    fixed: vendor fix RHSA-2024:2846
  • Red Hat Enterprise Linux RT (v. 9) kernel-rt 5.14.0-427.13.1.el9_4, kernel-rt-core 5.14.0-427.13.1.el9_4, kernel-rt-modules 5.14.0-427.13.1.el9_4, kernel-rt-debug-core 5.14.0-427.13.1.el9_4, kernel-rt-modules-core 5.14.0-427.13.1.el9_4, kernel-rt-debug-modules 5.14.0-427.13.1.el9_4, +4 more
    fixed: vendor fix RHSA-2024:2394
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-doc 5.14.0-284.66.1.el9_2
    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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.67% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns 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.