CVE-2025-40198
ext4: avoid potential buffer over-read in parse_apply_sb_mount_options()
CVE-2025-40198 is fixed in 76 products on 1 platform, first by DEBIAN-CVE-2025-40198, released November 12, 2025. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.8
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0017
5th percentile
In the Linux kernel, the following vulnerability has been resolved: ext4: avoid potential buffer over-read in parse_apply_sb_mount_options() Unlike other strings in the ext4 superblock, we rely on tune2fs to make sure s_mount_opts is NUL terminated. Harden parse_apply_sb_mount_options() by treating s_mount_opts as a potential __nonstring.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bpftool · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| bpftool-debuginfo · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| bpftool6.12 · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| bpftool6.12-debuginfo · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| dtb-aarch64 · opensuse-leap 15.6 | 6.4.0-150600.23.81.1 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| dtb-aarch64 · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-64kb · opensuse-leap 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-64kb · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-64kb · sles 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-64kb · sles 15.7 | 6.4.0-150700.53.25.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-64kb · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-azure · opensuse-leap 15.6 | 6.4.0-150600.8.58.1 | SUSE-SU-2025:4505-1 | Dec 22, 2025 |
| kernel-azure · sles 15.6 | 6.4.0-150600.8.58.1 | SUSE-SU-2025:4505-1 | Dec 22, 2025 |
| kernel-azure · sles 15.7 | 6.4.0-150700.20.21.1 | SUSE-SU-2025:4517-1 | Dec 23, 2025 |
| kernel-debug · opensuse-leap 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-debuginfo · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-debuginfo-common-aarch64 · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-debuginfo-common-x86_64 · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-default · opensuse-leap 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-default · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-default · sles 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-default · sles 15.7 | 6.4.0-150700.53.25.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-default · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-default-base · opensuse-leap 15.6 | 6.4.0-150600.23.81.3.150600.12.36.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-default-base · opensuse-leap 16.0 | 6.12.0-160000.8.1.160000.2.5 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-default-base · sles 15.6 | 6.4.0-150600.23.81.3.150600.12.36.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-default-base · sles 15.7 | 6.4.0-150700.53.25.1.150700.17.17.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-default-base · sles 16.0 | 6.12.0-160000.8.1.160000.2.5 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-devel · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-docs · opensuse-leap 15.6 | 6.4.0-150600.23.81.1 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-docs · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-docs · sles 15.6 | 6.4.0-150600.23.81.1 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-docs · sles 15.7 | 6.4.0-150700.53.25.2 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-docs · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-headers · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-kvmsmall · opensuse-leap 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-kvmsmall · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-kvmsmall · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-libbpf · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-libbpf-debuginfo · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-libbpf-devel · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-libbpf-static · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-livepatch-6.1.158-178.288 · amzn 2023 | 1:1.0-0.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-livepatch-6.12.55-74.119 · amzn 2023 | 1:1.0-0.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| kernel-livepatch-SLE15-SP6-RT_Update_18 · sles 15.6 | 1-150600.1.3.1 | SUSE-SU-2025:4521-1 | Dec 24, 2025 |
| kernel-livepatch-SLE15-SP6_Update_18 · sles 15.6 | 1-150600.13.3.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-livepatch-SLE15-SP7-RT_Update_7 · sles 15.7 | 1-150700.1.3.1 | SUSE-SU-2025:4516-1 | Dec 23, 2025 |
| kernel-livepatch-SLE15-SP7_Update_7 · sles 15.7 | 1-150700.15.3.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-modules-extra · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-modules-extra-common · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-obs-build · opensuse-leap 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-obs-build · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-obs-build · sles 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-obs-build · sles 15.7 | 6.4.0-150700.53.25.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-obs-qa · opensuse-leap 15.6 | 6.4.0-150600.23.81.1 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-obs-qa · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-obs-qa · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-rt · opensuse-leap 15.6 | 6.4.0-150600.10.61.1 | SUSE-SU-2025:4521-1 | Dec 24, 2025 |
| kernel-rt · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-rt_debug · opensuse-leap 15.6 | 6.4.0-150600.10.61.1 | SUSE-SU-2025:4521-1 | Dec 24, 2025 |
| kernel-source · opensuse-leap 15.6 | 6.4.0-150600.23.81.2 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-source · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-source · sles 15.6 | 6.4.0-150600.23.81.2 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-source · sles 15.7 | 6.4.0-150700.53.25.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-source · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-source-azure · opensuse-leap 15.6 | 6.4.0-150600.8.58.1 | SUSE-SU-2025:4505-1 | Dec 22, 2025 |
| kernel-source-azure · sles 15.6 | 6.4.0-150600.8.58.1 | SUSE-SU-2025:4505-1 | Dec 22, 2025 |
| kernel-source-azure · sles 15.7 | 6.4.0-150700.20.21.1 | SUSE-SU-2025:4517-1 | Dec 23, 2025 |
| kernel-source-rt · opensuse-leap 15.6 | 6.4.0-150600.10.61.1 | SUSE-SU-2025:4521-1 | Dec 24, 2025 |
| kernel-syms · opensuse-leap 15.6 | 6.4.0-150600.23.81.1 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-syms · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-syms · sles 15.6 | 6.4.0-150600.23.81.1 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-syms · sles 15.7 | 6.4.0-150700.53.25.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-syms · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel-syms-azure · opensuse-leap 15.6 | 6.4.0-150600.8.58.1 | SUSE-SU-2025:4505-1 | Dec 22, 2025 |
| kernel-syms-azure · sles 15.6 | 6.4.0-150600.8.58.1 | SUSE-SU-2025:4505-1 | Dec 22, 2025 |
| kernel-syms-azure · sles 15.7 | 6.4.0-150700.20.21.1 | SUSE-SU-2025:4517-1 | Dec 23, 2025 |
| kernel-syms-rt · opensuse-leap 15.6 | 6.4.0-150600.10.61.1 | SUSE-SU-2025:4521-1 | Dec 24, 2025 |
| kernel-tools · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-tools-debuginfo · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-tools-devel · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| kernel-uek · ol 8 | 0:5.4.17-2136.350.3.1.el8uek | ELSA-2025-28049 | Dec 12, 2025 |
| kernel-uek-container · ol 8 | 0:5.4.17-2136.350.3.1.el8uek | ELSA-2025-28049 | Dec 12, 2025 |
| kernel-uek-container-debug · ol 8 | 0:5.4.17-2136.350.3.1.el8uek | ELSA-2025-28049 | Dec 12, 2025 |
| kernel-uek-debug · ol 8 | 0:5.4.17-2136.350.3.1.el8uek | ELSA-2025-28049 | Dec 12, 2025 |
| kernel-uek-debug-devel · ol 8 | 0:5.4.17-2136.350.3.1.el8uek | ELSA-2025-28049 | Dec 12, 2025 |
| kernel-uek-devel · ol 8 | 0:5.4.17-2136.350.3.1.el8uek | ELSA-2025-28049 | Dec 12, 2025 |
| kernel-uek-doc · ol 8 | 0:5.4.17-2136.350.3.1.el8uek | ELSA-2025-28049 | Dec 12, 2025 |
| kernel-uek-tools · ol 8 | 0:5.4.17-2136.350.3.1.el7uek | ELSA-2025-28049 | Dec 12, 2025 |
| kernel-zfcpdump · opensuse-leap 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-zfcpdump · opensuse-leap 16.0 | 6.12.0-160000.8.1 | OPENSUSE-SU-2025:20172-1 | Dec 19, 2025 |
| kernel-zfcpdump · sles 15.6 | 6.4.0-150600.23.81.3 | SUSE-SU-2025:4422-1 | Dec 17, 2025 |
| kernel-zfcpdump · sles 15.7 | 6.4.0-150700.53.25.1 | SUSE-SU-2025:4393-1 | Dec 15, 2025 |
| kernel-zfcpdump · sles 16.0 | 6.12.0-160000.8.1 | SUSE-SU-2026:20015-1 | Dec 19, 2025 |
| kernel6.12 · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| kernel6.12-debuginfo · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| kernel6.12-debuginfo-common-aarch64 · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| kernel6.12-debuginfo-common-x86_64 · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| kernel6.12-devel · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| kernel6.12-headers · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| kernel6.12-libbpf · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| kernel6.12-libbpf-debuginfo · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| kernel6.12-libbpf-devel · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| kernel6.12-libbpf-static · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| kernel6.12-modules-extra · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| kernel6.12-modules-extra-common · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| kernel6.12-tools · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| kernel6.12-tools-debuginfo · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| kernel6.12-tools-devel · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| linux · Debian 12.15 (bookworm) | 6.1.158-1 | DEBIAN-CVE-2025-40198 | Nov 12, 2025 |
| linux · Debian 13.5 (trixie) | 6.12.57-1 | DEBIAN-CVE-2025-40198 | Nov 12, 2025 |
| linux · Debian 14 | 6.17.6-1 | DEBIAN-CVE-2025-40198 | Nov 12, 2025 |
| perf · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| perf-debuginfo · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| perf6.12 · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| perf6.12-debuginfo · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| python3-perf · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| python3-perf-debuginfo · amzn 2023 | 1:6.1.158-178.288.amzn2023 | ALAS2023-2025-1297 | Dec 8, 2025 |
| python3-perf6.12 · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
| python3-perf6.12-debuginfo · amzn 2023 | 1:6.12.55-74.119.amzn2023 | ALAS2023-2025-1316 | Dec 8, 2025 |
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