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Fencer Vulns
high 8.8

CVE-2024-26779 json

wifi: mac80211: fix race condition on enabling fast-xmit

published 2024-04-03 2 y ago modified 2026-08-05 3 mo ago also EUVD-2024-24041

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

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

wifi: mac80211: fix race condition on enabling fast-xmit

fast-xmit must only be enabled after the sta has been uploaded to the driver, otherwise it could end up passing the not-yet-uploaded sta via drv_tx calls to the driver, leading to potential crashes because of uninitialized drv_priv data. Add a missing sta->uploaded check and re-check fast xmit after inserting a sta.

Patch / fix

  • Linux Linux 4.19.308, 5.4.270, 5.10.211, 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-2024-26779

  • linux Ubuntu 20.04 LTS 5.4.0-186.206
  • linux Ubuntu 22.04 LTS 5.15.0-112.122
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1126.136
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1063.69
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1130.139
  • 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 20.04 LTS 5.4.0-1073.78

ubuntu advisories UBUNTU-CVE-2024-26779

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-rt RHEL 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel-rt-kvm RHEL 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel-rt-core RHEL 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel-rt-modules RHEL 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel-rt-debug-kvm RHEL 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel-rt-debug-core RHEL 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel-rt-debug-modules RHEL 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel-rt-modules-extra RHEL 8 4.18.0-553.5.1.rt7.346.el8_10

red hat advisories RHSA-2025:3935RHSA-2024:3627RHSA-2024:3618

  • kernel-azure SLE Module for Public Cloud 15 SP6, openSUSE Leap 15.6 6.4.0-150600.8.5.4
  • kernel-syms-azure SLE Module for Public Cloud 15 SP6, openSUSE Leap 15.6 6.4.0-150600.8.5.1
  • kernel-source-azure SLE Module for Public Cloud 15 SP6, openSUSE Leap 15.6 6.4.0-150600.8.5.4
  • 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 5.5, Real Time Module 15 SP5, openSUSE Leap 15.5 5.14.21-150500.13.52.1

suse advisories SUSE-SU-2024:2135-1SUSE-SU-2024:1870-1SUSE-SU-2024:1663-1SUSE-SU-2024:1659-1SUSE-SU-2024:1646-1SUSE-SU-2024:1643-1

  • kernel AlmaLinux 8 4.18.0-553.5.1.el8_10
  • perf AlmaLinux 8 4.18.0-553.5.1.el8_10
  • bpftool AlmaLinux 8 4.18.0-553.5.1.el8_10
  • kernel-core AlmaLinux 8 4.18.0-553.5.1.el8_10
  • kernel-tools AlmaLinux 8 4.18.0-553.5.1.el8_10
  • python3-perf AlmaLinux 8 4.18.0-553.5.1.el8_10
  • kernel-modules AlmaLinux 8 4.18.0-553.5.1.el8_10
  • kernel-zfcpdump AlmaLinux 8 4.18.0-553.5.1.el8_10

almalinux advisories ALSA-2024:3618ALSA-2024:3627

  • kernel-rt Rocky Linux 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel Rocky Linux 8 4.18.0-553.5.1.el8_10

rocky linux advisories RLSA-2024:3627RLSA-2024:3618

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-2024-26779 updated cvss 5.5

kernel: wifi: mac80211: fix race condition on enabling fast-xmit

  • 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
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +82 more
    affected: no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.65.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.65.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.65.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.65.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.65.1.el9_4 Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.65.1.el9_4, perf 5.14.0-427.65.1.el9_4, rtla 5.14.0-427.65.1.el9_4, kernel-devel-matched 5.14.0-427.65.1.el9_4, kernel-64k-devel-matched 5.14.0-427.65.1.el9_4, kernel-debug-devel-matched 5.14.0-427.65.1.el9_4, +6 more
    fixed: vendor fix RHSA-2025:3935
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.5.1.el8_10, kernel 4.18.0-553.5.1.el8_10, bpftool 4.18.0-553.5.1.el8_10, kernel-core 4.18.0-553.5.1.el8_10, kernel-tools 4.18.0-553.5.1.el8_10, python3-perf 4.18.0-553.5.1.el8_10, +15 more
    fixed: vendor fix RHSA-2024:3618
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.65.1.el9_4, kernel 5.14.0-427.65.1.el9_4, kernel-64k 5.14.0-427.65.1.el9_4, kernel-core 5.14.0-427.65.1.el9_4, kernel-tools 5.14.0-427.65.1.el9_4, python3-perf 5.14.0-427.65.1.el9_4, +28 more
    fixed: vendor fix RHSA-2025:3935
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.5.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.5.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.5.1.el8_10
    fixed: vendor fix RHSA-2024:3618
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-kvm 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-core 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-modules 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-kvm 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-core 4.18.0-553.5.1.rt7.346.el8_10, +4 more
    fixed: vendor fix RHSA-2024:3627
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.65.1.el9_4, kernel-rt-core 5.14.0-427.65.1.el9_4, kernel-rt-modules 5.14.0-427.65.1.el9_4, kernel-rt-debug-core 5.14.0-427.65.1.el9_4, kernel-rt-modules-core 5.14.0-427.65.1.el9_4, kernel-rt-debug-modules 5.14.0-427.65.1.el9_4, +4 more Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt 5.14.0-427.65.1.el9_4, kernel-rt-kvm 5.14.0-427.65.1.el9_4, kernel-rt-core 5.14.0-427.65.1.el9_4, kernel-rt-modules 5.14.0-427.65.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.65.1.el9_4, kernel-rt-debug-core 5.14.0-427.65.1.el9_4, +6 more
    fixed: vendor fix RHSA-2025:3935
show 1 more
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-core 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-modules 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-core 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-modules 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-modules-extra 4.18.0-553.5.1.rt7.346.el8_10, +2 more
    fixed: vendor fix RHSA-2024:3627

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 ICSA-25-226-15 updated

Siemens SINEC OS

  • Siemens RUGGEDCOM RST2428P (6GK6242-6PA00) Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family
    not affected

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA 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

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
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.