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Fencer Vulns
high 7.8

CVE-2024-27403 json

netfilter: nft_flow_offload: reset dst in route object after setting up flow

published 2024-05-17 2 y ago modified 2026-08-05 3 mo ago also EUVD-2024-24607

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits
0
none known

Summary

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

netfilter: nft_flow_offload: reset dst in route object after setting up flow

dst is transferred to the flow object, route object does not own it anymore. Reset dst in route object, otherwise if flow_offload_add() fails, error path releases dst twice, leading to a refcount underflow.

Patch / fix

  • Linux Linux 5.15.150, 6.1.80, 6.6.19, 6.7.7, 6.8
  • linux Debian 12 6.1.82-1
  • linux Debian 14, Debian 13 6.7.7-1

debian advisories DEBIAN-CVE-2024-27403

  • linux Ubuntu 22.04 LTS 5.15.0-112.122
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1063.69
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1062.70
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1060.66
  • linux-ibm Ubuntu 22.04 LTS 5.15.0-1056.59
  • linux-kvm Ubuntu 22.04 LTS 5.15.0-1060.65
  • linux-azure Ubuntu 22.04 LTS 5.15.0-1066.75
  • linux-gkeop Ubuntu 22.04 LTS 5.15.0-1046.53

ubuntu advisories UBUNTU-CVE-2024-27403

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 5.14.0-427.40.1.el9_4
  • rv RHEL 9 5.14.0-427.40.1.el9_4
  • perf RHEL 9 5.14.0-427.40.1.el9_4
  • rtla RHEL 9 5.14.0-427.40.1.el9_4
  • bpftool RHEL 9 7.3.0-427.40.1.el9_4
  • libperf RHEL 9 5.14.0-427.40.1.el9_4
  • kernel-rt RHEL 9 5.14.0-427.40.1.el9_4
  • kernel-64k RHEL 9 5.14.0-427.40.1.el9_4

red hat advisories RHSA-2024:8162RHSA-2024:5257RHSA-2024:5256RHSA-2024:4106RHSA-2024:4108

  • kernel-rt Linux Micro 6.0 6.4.0-10.1
  • kernel-source-rt Linux Micro 6.0 6.4.0-10.1
  • kernel-livepatch-MICRO-6-0-RT_Update_2 Linux Micro 6.0 1-1.1
  • kernel-source Linux Micro 6.0 6.4.0-19.1
  • kernel-default Linux Micro 6.0 6.4.0-19.1
  • kernel-kvmsmall Linux Micro 6.0 6.4.0-19.1
  • kernel-default-base Linux Micro 6.0 6.4.0-17.1.1.51
  • kernel-livepatch-MICRO-6-0_Update_2 Linux Micro 6.0 1-1.1

suse advisories SUSE-SU-2025:20047-1SUSE-SU-2025:20044-1SUSE-SU-2024:3483-1SUSE-SU-2024:3383-1SUSE-SU-2024:3209-1SUSE-SU-2024:3195-1

  • kernel AlmaLinux 9 5.14.0-427.40.1.el9_4
  • rv AlmaLinux 9 5.14.0-427.40.1.el9_4
  • perf AlmaLinux 9 5.14.0-427.40.1.el9_4
  • rtla AlmaLinux 9 5.14.0-427.40.1.el9_4
  • bpftool AlmaLinux 9 7.3.0-427.40.1.el9_4
  • libperf AlmaLinux 9 5.14.0-427.40.1.el9_4
  • kernel-rt AlmaLinux 9 5.14.0-427.40.1.el9_4
  • kernel-64k AlmaLinux 9 5.14.0-427.40.1.el9_4

almalinux advisories ALSA-2024:8162

  • kernel Rocky Linux 9 5.14.0-427.40.1.el9_4

rocky linux advisories RLSA-2024:8162

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-2024-27403 updated cvss 5.5

kernel: netfilter: nft_flow_offload: reset dst in route object after setting up flow

  • Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
    affected: no fix available “Fix deferred”
  • 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: no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-debuginfo-common-s390x 5.14.0-284.71.1.el9_2, kernel-debuginfo-common-x86_64 5.14.0-284.71.1.el9_2, kernel-debuginfo-common-aarch64 5.14.0-284.71.1.el9_2, kernel-debuginfo-common-ppc64le 5.14.0-284.71.1.el9_2
    fixed: vendor fix RHSA-2024:4108
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-427.40.1.el9_4, perf 5.14.0-427.40.1.el9_4, rtla 5.14.0-427.40.1.el9_4, kernel-devel-matched 5.14.0-427.40.1.el9_4, kernel-64k-devel-matched 5.14.0-427.40.1.el9_4, kernel-debug-devel-matched 5.14.0-427.40.1.el9_4, +6 more
    fixed: vendor fix RHSA-2024:8162
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.112.1.el9_0, kernel-devel-matched 5.14.0-70.112.1.el9_0, kernel-debug-devel-matched 5.14.0-70.112.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.112.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.112.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.112.1.el9_0, +2 more
    fixed: vendor fix RHSA-2024:5257
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) perf 5.14.0-284.71.1.el9_2, rtla 5.14.0-284.71.1.el9_2, kernel-devel-matched 5.14.0-284.71.1.el9_2, kernel-64k-devel-matched 5.14.0-284.71.1.el9_2, kernel-debug-devel-matched 5.14.0-284.71.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.71.1.el9_2, +5 more
    fixed: vendor fix RHSA-2024:4108
  • Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.3.0-427.40.1.el9_4, kernel 5.14.0-427.40.1.el9_4, kernel-64k 5.14.0-427.40.1.el9_4, kernel-core 5.14.0-427.40.1.el9_4, kernel-tools 5.14.0-427.40.1.el9_4, python3-perf 5.14.0-427.40.1.el9_4, +28 more
    fixed: vendor fix RHSA-2024:8162
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.112.1.el9_0, bpftool 5.14.0-70.112.1.el9_0, kernel-core 5.14.0-70.112.1.el9_0, kernel-tools 5.14.0-70.112.1.el9_0, python3-perf 5.14.0-70.112.1.el9_0, kernel-modules 5.14.0-70.112.1.el9_0, +14 more
    fixed: vendor fix RHSA-2024:5257
show 6 more
  • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool 7.0.0-284.71.1.el9_2, kernel 5.14.0-284.71.1.el9_2, kernel-64k 5.14.0-284.71.1.el9_2, kernel-core 5.14.0-284.71.1.el9_2, kernel-tools 5.14.0-284.71.1.el9_2, python3-perf 5.14.0-284.71.1.el9_2, +28 more
    fixed: vendor fix RHSA-2024:4108
  • Red Hat Enterprise Linux CRB (v. 9) libperf 5.14.0-427.40.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.40.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.40.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.40.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.40.1.el9_4 Red Hat Enterprise Linux NFV (v. 9) kernel-rt 5.14.0-427.40.1.el9_4, kernel-rt-kvm 5.14.0-427.40.1.el9_4, kernel-rt-core 5.14.0-427.40.1.el9_4, kernel-rt-modules 5.14.0-427.40.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.40.1.el9_4, kernel-rt-debug-core 5.14.0-427.40.1.el9_4, +6 more
    fixed: vendor fix RHSA-2024:8162
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.112.1.rt21.184.el9_0, kernel-rt-kvm 5.14.0-70.112.1.rt21.184.el9_0, kernel-rt-core 5.14.0-70.112.1.rt21.184.el9_0, kernel-rt-modules 5.14.0-70.112.1.rt21.184.el9_0, kernel-rt-debug-kvm 5.14.0-70.112.1.rt21.184.el9_0, kernel-rt-debug-core 5.14.0-70.112.1.rt21.184.el9_0, +4 more Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.112.1.rt21.184.el9_0, kernel-rt-core 5.14.0-70.112.1.rt21.184.el9_0, kernel-rt-modules 5.14.0-70.112.1.rt21.184.el9_0, kernel-rt-debug-core 5.14.0-70.112.1.rt21.184.el9_0, kernel-rt-debug-modules 5.14.0-70.112.1.rt21.184.el9_0, kernel-rt-modules-extra 5.14.0-70.112.1.rt21.184.el9_0, +2 more
    fixed: vendor fix RHSA-2024:5256
  • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt 5.14.0-284.71.1.rt14.356.el9_2, kernel-rt-core 5.14.0-284.71.1.rt14.356.el9_2, kernel-rt-modules 5.14.0-284.71.1.rt14.356.el9_2, kernel-rt-debug-core 5.14.0-284.71.1.rt14.356.el9_2, kernel-rt-modules-core 5.14.0-284.71.1.rt14.356.el9_2, kernel-rt-debug-modules 5.14.0-284.71.1.rt14.356.el9_2, +4 more Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt 5.14.0-284.71.1.rt14.356.el9_2, kernel-rt-kvm 5.14.0-284.71.1.rt14.356.el9_2, kernel-rt-core 5.14.0-284.71.1.rt14.356.el9_2, kernel-rt-modules 5.14.0-284.71.1.rt14.356.el9_2, kernel-rt-debug-kvm 5.14.0-284.71.1.rt14.356.el9_2, kernel-rt-debug-core 5.14.0-284.71.1.rt14.356.el9_2, +6 more
    fixed: vendor fix RHSA-2024:4106
  • Red Hat Enterprise Linux RT (v. 9) kernel-rt 5.14.0-427.40.1.el9_4, kernel-rt-core 5.14.0-427.40.1.el9_4, kernel-rt-modules 5.14.0-427.40.1.el9_4, kernel-rt-debug-core 5.14.0-427.40.1.el9_4, kernel-rt-modules-core 5.14.0-427.40.1.el9_4, kernel-rt-debug-modules 5.14.0-427.40.1.el9_4, +4 more
    fixed: vendor fix RHSA-2024:8162
  • 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 AppStream EUS (v.9.2) kernel-doc 5.14.0-284.71.1.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

0.24% chance of exploitation in the next 30 days, higher than 15% 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 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux

Classification

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.