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Fencer Vulns
critical 9.3

CVE-2026-72329 in the critical feed json

net/liquidio: drop cached VF pci_dev LUT

published 2026-08-15 2 mo ago modified 2026-10-30 10 d ago also EUVD-2026-59228

cvss
9.3
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 9%
public exploits
0
none known

Summary

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

net/liquidio: drop cached VF pci_dev LUT

The PF SR-IOV enable path caches VF pci_dev pointers in dpiring_to_vfpcidev_lut[] by iterating with pci_get_device(). Those entries do not own a reference, because the iterator drops the previous device reference on each step. The cached pointer is then dereferenced later when handling OCTEON_VF_FLR_REQUEST.

Replace the cached VF mapping with runtime lookup on the mailbox DPI ring: derive the VF index from q_no, resolve the VF via exported PCI IOV helpers, validate it with the PF pointer and VF ID, then issue pcie_flr() and drop the reference with pci_dev_put(). Remove the unused VF lookup table initialization and cleanup.

Patch / fix

  • Linux Linux 6.1.191, 6.6.160, 6.12.114, 6.18.57, 7.1.5, 7.2
  • linux Debian 13 6.12.115-2
  • linux Debian 14 7.1.5-1

debian advisories DEBIAN-CVE-2026-72329

  • linux Ubuntu 26.04 LTS 7.0.0-34.34
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1013.13
  • linux-gcp Ubuntu 26.04 LTS 7.0.0-1013.13
  • linux-gke Ubuntu 26.04 LTS 7.0.0-1007.8
  • linux-ibm Ubuntu 26.04 LTS 7.0.0-1014.14
  • linux-azure Ubuntu 26.04 LTS 7.0.0-1017.17
  • linux-raspi Ubuntu 26.04 LTS 7.0.0-1020.20
  • linux-riscv Ubuntu 26.04 LTS 7.0.0-34.34.1

ubuntu advisories UBUNTU-CVE-2026-72329

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 8 4.18.0-553.170.1.el8_10
  • perf RHEL 8 4.18.0-553.170.1.el8_10
  • bpftool RHEL 8 4.18.0-553.170.1.el8_10
  • kernel-core RHEL 8 4.18.0-553.170.1.el8_10
  • kernel-tools RHEL 8 4.18.0-553.170.1.el8_10
  • python3-perf RHEL 8 4.18.0-553.170.1.el8_10
  • kernel-modules RHEL 8 4.18.0-553.170.1.el8_10
  • kernel-zfcpdump RHEL 8 4.18.0-553.170.1.el8_10

red hat advisories RHSA-2026:74133RHSA-2026:74132

  • kernel-rt AlmaLinux 8 4.18.0-553.170.1.rt7.511.el8_10
  • kernel-rt-core AlmaLinux 8 4.18.0-553.170.1.rt7.511.el8_10
  • kernel-rt-modules AlmaLinux 8 4.18.0-553.170.1.rt7.511.el8_10
  • kernel-rt-debug-core AlmaLinux 8 4.18.0-553.170.1.rt7.511.el8_10
  • kernel-rt-debug-modules AlmaLinux 8 4.18.0-553.170.1.rt7.511.el8_10
  • kernel-rt-modules-extra AlmaLinux 8 4.18.0-553.170.1.rt7.511.el8_10
  • kernel-rt-debug-modules-extra AlmaLinux 8 4.18.0-553.170.1.rt7.511.el8_10
  • kernel AlmaLinux 8 4.18.0-553.170.1.el8_10

almalinux advisories ALSA-2026:74132ALSA-2026:74133

  • kernel-rt Rocky Linux 8 4.18.0-553.170.1.rt7.511.el8_10
  • kernel Rocky Linux 8 4.18.0-553.170.1.el8_10

rocky linux advisories RLSA-2026:74132RLSA-2026:74133

  • kernel Azure Linux 3.0 6.6.161.1-1

azure linux advisories AZL-96435

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2026-72329 updated cvss 4.7

kernel: net/liquidio: drop cached VF pci_dev LUT

  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.170.1.el8_10, kernel 4.18.0-553.170.1.el8_10, bpftool 4.18.0-553.170.1.el8_10, kernel-core 4.18.0-553.170.1.el8_10, kernel-tools 4.18.0-553.170.1.el8_10, python3-perf 4.18.0-553.170.1.el8_10, +15 more Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.170.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.170.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.170.1.el8_10
    fixed: vendor fix RHSA-2026:74133
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.170.1.rt7.511.el8_10, kernel-rt-kvm 4.18.0-553.170.1.rt7.511.el8_10, kernel-rt-core 4.18.0-553.170.1.rt7.511.el8_10, kernel-rt-modules 4.18.0-553.170.1.rt7.511.el8_10, kernel-rt-debug-kvm 4.18.0-553.170.1.rt7.511.el8_10, kernel-rt-debug-core 4.18.0-553.170.1.rt7.511.el8_10, +4 more Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.170.1.rt7.511.el8_10, kernel-rt-core 4.18.0-553.170.1.rt7.511.el8_10, kernel-rt-modules 4.18.0-553.170.1.rt7.511.el8_10, kernel-rt-debug-core 4.18.0-553.170.1.rt7.511.el8_10, kernel-rt-debug-modules 4.18.0-553.170.1.rt7.511.el8_10, kernel-rt-modules-extra 4.18.0-553.170.1.rt7.511.el8_10, +2 more
    fixed: vendor fix RHSA-2026:74132
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernel
    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
total
Assessed
23 d ago

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/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.