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Unscored CVE-2025-21853 EUVD-2025-6392GHSA-xgr9-crfp-4qg4

bpf: avoid holding freeze_mutex during mmap operation

Published Mar 12, 2025 · Updated Nov 10, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: kernel Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.15 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-6.8 Package: linux-aws-fips Package: linux-azure Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.15 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.8 Package: linux-azure-6.11 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-6.8 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-fips Package: linux-azure-nvidia Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.15 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.8 Package: linux-gcp-6.11 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-6.8 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.15 Package: linux-hwe-5.19 Package: linux-hwe-5.8 Package: linux-hwe-6.11 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-6.8 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.15 Package: linux-ibm-6.8 Package: linux-intel Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-intel-iotg Package: linux-intel-iotg-5.15 Package: linux-kvm Package: linux-lowlatency Package: linux-lowlatency-hwe-5.15 Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.11 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lowlatency-hwe-6.8 Package: linux-nvidia Package: linux-nvidia-6.11 Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-6.8 Package: linux-nvidia-lowlatency Package: linux-nvidia-tegra Package: linux-nvidia-tegra-5.15 Package: linux-nvidia-tegra-igx Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.11 Package: linux-oem-6.5 Package: linux-oem-6.8 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.15 Package: linux-oracle-5.3 Package: linux-oracle-5.8 Package: linux-oracle-6.5 Package: linux-oracle-6.8 Package: linux-raspi Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-realtime-6.8 Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.15 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.5 Package: linux-riscv-6.8 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx Package: linux-xilinx-zynqmp Platform: Linux Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

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

bpf: avoid holding freeze_mutex during mmap operation

We use map->freeze_mutex to prevent races between map_freeze() and
memory mapping BPF map contents with writable permissions. The way we
naively do this means we'll hold freeze_mutex for entire duration of all
the mm and VMA manipulations, which is completely unnecessary. This can
potentially also lead to deadlocks, as reported by syzbot in [0].

So, instead, hold freeze_mutex only during writeability checks, bump
(proactively) "write active" count for the map, unlock the mutex and
proceed with mmap logic. And only if something went wrong during mmap
logic, then undo that "write active" counter increment.

[0] https://lore.kernel.org/bpf/678dcbc9.050a0220.303755.0066.GAE@google.com/

Affected products

VendorProductAffectedFixed
Linux Linux 5.5 5.10.237

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 linux 6.12.17-1 —
Debian 13 linux 6.12.17-1 —
Debian 12 linux 6.1.135-1 DSA-5907-1
Debian 11 linux 5.10.237-1 DLA-4178-1
Debian 11 linux-6.1 6.1.137-1~deb11u1 DLA-4193-1
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield 5.15.0-1072.74 —
Ubuntu 24.04 LTS linux 6.8.0-78.78 USN-7703-1
Ubuntu 24.04 LTS linux-aws 6.8.0-1035.37 USN-7703-1
Ubuntu 24.04 LTS linux-azure 6.8.0-1034.39 USN-7737-1
Ubuntu 24.04 LTS linux-azure-nvidia 6.8.0-1022.23 USN-7737-1
Ubuntu 24.04 LTS linux-gcp 6.8.0-1036.38 USN-7703-2
Ubuntu 24.04 LTS linux-gcp-6.11 +1 6.11.0-1015.15~24.04.1 USN-7521-1
Ubuntu 24.04 LTS linux-gke 6.8.0-1032.36 USN-7703-4
Ubuntu 24.04 LTS linux-gkeop 6.8.0-1019.21 USN-7703-2
Ubuntu 24.04 LTS linux-hwe-6.11 6.11.0-26.26~24.04.1 USN-7521-1
Ubuntu 24.04 LTS linux-ibm 6.8.0-1033.33 USN-7703-2
Ubuntu 24.04 LTS linux-intel +4 No fix yet —
Ubuntu 24.04 LTS linux-lowlatency 6.8.0-78.78.1 USN-7703-1
Ubuntu 24.04 LTS linux-lowlatency-hwe-6.11 6.11.0-1014.15~24.04.1 USN-7521-3
Ubuntu 24.04 LTS linux-nvidia 6.8.0-1035.38 USN-7703-4
Ubuntu 24.04 LTS linux-nvidia-6.11 6.11.0-1010.10 —
Ubuntu 24.04 LTS linux-nvidia-lowlatency 6.8.0-1035.38.1 USN-7703-4
Ubuntu 24.04 LTS linux-nvidia-tegra 6.8.0-1009.9 —
Ubuntu 24.04 LTS linux-oem-6.11 6.11.0-1022.22 USN-7521-1
Ubuntu 24.04 LTS linux-oracle 6.8.0-1032.33 USN-7703-3
Ubuntu 24.04 LTS linux-raspi 6.8.0-1035.39 USN-7703-4
Ubuntu 24.04 LTS linux-xilinx 6.8.0-1017.18 —
Ubuntu 22.04 LTS linux +1 5.15.0-144.157 USN-7654-1
Ubuntu 22.04 LTS linux-aws 5.15.0-1088.95 USN-7654-1
Ubuntu 22.04 LTS linux-aws-6.8 6.8.0-1035.37~22.04.1 USN-7703-2
Ubuntu 22.04 LTS linux-azure 5.15.0-1094.103 USN-7711-1
Ubuntu 22.04 LTS linux-azure-6.8 6.8.0-1034.39~22.04.1 USN-7737-1
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1094.103.1 —
Ubuntu 22.04 LTS linux-gcp 5.15.0-1087.96 USN-7654-1
Ubuntu 22.04 LTS linux-gcp-6.8 6.8.0-1036.38~22.04.1 USN-7703-2
Ubuntu 22.04 LTS linux-gke +1 5.15.0-1085.91 USN-7654-1
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1070.78 USN-7654-1
Ubuntu 22.04 LTS linux-hwe-6.8 +1 6.8.0-78.78~22.04.1 USN-7703-4
Ubuntu 22.04 LTS linux-ibm 5.15.0-1080.83 USN-7654-1
Ubuntu 22.04 LTS linux-ibm-6.8 6.8.0-1033.33~22.04.1 USN-7703-2
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1083.89 USN-7654-1
Ubuntu 22.04 LTS linux-kvm 5.15.0-1084.89 USN-7654-4
Ubuntu 22.04 LTS linux-lowlatency-hwe-6.8 6.8.0-78.78.1~22.04.1 USN-7703-1
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1082.83 USN-7654-1
Ubuntu 22.04 LTS linux-nvidia-6.8 6.8.0-1035.38~22.04.1 USN-7703-4
Ubuntu 22.04 LTS linux-nvidia-tegra 5.15.0-1041.41 USN-7654-1
Ubuntu 22.04 LTS linux-nvidia-tegra-igx 5.15.0-1030.30 USN-7654-1
Ubuntu 22.04 LTS linux-oracle-6.8 6.8.0-1032.33~22.04.1 USN-7703-3
Ubuntu 22.04 LTS linux-raspi 5.15.0-1083.86 USN-7686-1
Ubuntu 22.04 LTS linux-riscv +32 No fix yet —
Ubuntu 22.04 LTS linux-xilinx-zynqmp 5.15.0-1052.56 USN-7654-5
Ubuntu 20.04 LTS linux-gke +28 No fix yet —
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Show 7 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro Realtime 24.04 LTS linux-raspi-realtime 6.8.0-2028.29 USN-7719-1
Ubuntu Pro Realtime 24.04 LTS linux-realtime 6.8.1-1030.31 USN-7703-1
Ubuntu Pro Realtime 22.04 LTS linux-intel-iot-realtime 5.15.0-1081.83 USN-7654-2
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1088.97 USN-7654-2
Ubuntu Pro Realtime 22.04 LTS linux-realtime-6.8 6.8.1-1030.31~22.04.1 —
Ubuntu Pro FIPS-updates 24.04 LTS linux-fips 6.8.0-78.78+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-aws-fips 5.15.0-1088.95+fips1 USN-7654-3
Ubuntu Pro FIPS-updates 22.04 LTS linux-azure-fips 5.15.0-1094.103+fips1 USN-7712-1
Ubuntu Pro FIPS-updates 22.04 LTS linux-fips 5.15.0-144.157+fips1 USN-7654-3
Ubuntu Pro FIPS-updates 22.04 LTS linux-gcp-fips 5.15.0-1087.96+fips1 USN-7654-3
Ubuntu Pro FIPS-preview 22.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro 20.04 LTS linux-aws-5.15 5.15.0-1088.95~20.04.1 USN-7654-1
Ubuntu Pro 20.04 LTS linux-azure-5.15 5.15.0-1094.103~20.04.1 USN-7712-2
Ubuntu Pro 20.04 LTS linux-gcp-5.15 5.15.0-1087.96~20.04.2 USN-7654-1
Ubuntu Pro 20.04 LTS linux-hwe-5.15 +1 5.15.0-144.157~20.04.1 USN-7654-1
Ubuntu Pro 20.04 LTS linux-ibm-5.15 5.15.0-1080.83~20.04.1 USN-7654-1
Ubuntu Pro 20.04 LTS linux-intel-iotg-5.15 5.15.0-1083.89~20.04.1 USN-7655-1
Ubuntu Pro 20.04 LTS linux-nvidia-tegra-5.15 5.15.0-1041.41~20.04.1 USN-7654-1
Ubuntu Pro 20.04 LTS linux-oracle-5.15 5.15.0-1085.91~20.04.3 USN-7654-1
Ubuntu Pro 20.04 LTS linux-riscv-5.15 5.15.0-1083.87~20.04.1 —
ReleasePackageFixed inAdvisory
RHEL 10 rv +76 6.12.0-124.8.1.el10_1 RHSA-2025:20095
RHEL 9 rv +75 5.14.0-611.5.1.el9_7 RHSA-2025:20518

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 10 rv +74 6.12.0-124.8.1.el10_1 ALSA-2025:20095
AlmaLinux 9 rv +73 5.14.0-611.5.1.el9_7 ALSA-2025:20518

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 10 kernel 6.12.0-124.8.1.el10_1 RLSA-2025:20095
Rocky Linux 9 kernel 5.14.0-611.5.1.el9_7 RLSA-2025:20518
ReleasePackageFixed inAdvisory
SLES 15 SP7 kernel-64kb +6 6.4.0-150700.53.3.1 SUSE-SU-2025:01951-1
SLES 15 SP7 kernel-azure +2 6.4.0-150700.20.3.1 SUSE-SU-2025:01967-1
SLES 15 SP7 kernel-default-base 6.4.0-150700.53.3.1.150700.17.2.1 SUSE-SU-2025:01951-1
SLES 15 SP6 kernel-64kb +6 6.4.0-150600.23.50.1 SUSE-SU-2025:01614-1
SLES 15 SP6 kernel-azure +2 6.4.0-150600.8.37.1 SUSE-SU-2025:01707-1
SLES 15 SP6 kernel-coco +3 6.4.0-15061.21.coco15sp6.1 SUSE-SU-2025:01919-1
SLES 15 SP6 kernel-default-base 6.4.0-150600.23.50.1.150600.12.22.1 SUSE-SU-2025:01614-1
Show 6 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLE Micro 6.1 kernel-default-base 6.4.0-29.1.21.7 SUSE-SU-2025:20354-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0_Update_7 +1 1-1.2 SUSE-SU-2025:20355-1, SUSE-SU-2025:20354-1
SLE Micro 6.1 kernel-rt +1 6.4.0-31.1 SUSE-SU-2025:20355-1
SLE Micro 6.1 kernel-source +2 6.4.0-29.1 SUSE-SU-2025:20354-1
SLE Micro 6.0 kernel-default-base 6.4.0-29.1.21.7 SUSE-SU-2025:20343-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0_Update_7 +1 1-1.2 SUSE-SU-2025:20344-1, SUSE-SU-2025:20343-1
SLE Micro 6.0 kernel-rt +1 6.4.0-31.1 SUSE-SU-2025:20344-1
SLE Micro 6.0 kernel-source +2 6.4.0-29.1 SUSE-SU-2025:20343-1
SLE Live Patching 15 SP7 kernel-default 6.4.0-150700.53.3.1 SUSE-SU-2025:01951-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7-RT_Update_1 1-150700.1.3.1 SUSE-SU-2025:01972-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7_Update_1 1-150700.15.3.1 SUSE-SU-2025:01951-1
SLE Live Patching 15 SP6 kernel-default 6.4.0-150600.23.50.1 SUSE-SU-2025:01614-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6-RT_Update_11 1-150600.1.3.2 SUSE-SU-2025:01964-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_11 1-150600.13.3.1 SUSE-SU-2025:01614-1
SUSE Real Time Module 15 SP7 kernel-rt +3 6.4.0-150700.7.3.1 SUSE-SU-2025:01972-1
SUSE Real Time Module 15 SP6 kernel-rt +3 6.4.0-150600.10.39.1 SUSE-SU-2025:01964-1
ReleasePackageFixed inAdvisory
openSUSE Leap 15.6 dtb-aarch64 +10 6.4.0-150600.23.50.1 SUSE-SU-2025:01614-1
openSUSE Leap 15.6 kernel-azure +2 6.4.0-150600.8.37.1 SUSE-SU-2025:01707-1
openSUSE Leap 15.6 kernel-default-base 6.4.0-150600.23.50.1.150600.12.22.1 SUSE-SU-2025:01614-1
openSUSE Leap 15.6 kernel-rt +3 6.4.0-150600.10.39.1 SUSE-SU-2025:01964-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.1.140-154.222 1.0-0.amzn2023 ALAS2023-2025-1050
Amazon Linux 2023 perf +14 6.1.140-154.222.amzn2023 ALAS2023-2025-1050

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 3 kernel 6.6.82.1-1 —
Azure Linux 2 (CBL-Mariner) kernel 5.15.182.1-1 —

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 9 kernel-uek +34 6.12.0-101.33.4.3.el10uek ELSA-2025-20530, ELSA-2025-20480
Oracle Linux 8 bpftool +18 5.15.0-310.184.5.2.el9uek ELSA-2025-20470

Advisories 48

References