CVE-2026-53015
erofs: unify lcn as u64 for 32-bit platforms
CVE-2026-53015 is fixed in 50 products on 1 platform, first by ALAS2023-2026-1894, released June 22, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
5.5
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0012
2nd percentile
In the Linux kernel, the following vulnerability has been resolved: erofs: unify lcn as u64 for 32-bit platforms As sashiko reported [1], `lcn` was typed as `unsigned long` (or `unsigned int` sometimes), which is only 32 bits wide on 32-bit platforms, which causes `(lcn << lclusterbits)` to be truncated at 4 GiB. In order to consolidate the logic, just use `u64` consistently around the codebase. [1] https://sashiko.dev/r/20260420034612.1899973-1-hsiangkao%40linux.alibaba.com
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bpftool6.12 · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| bpftool6.12-debuginfo · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| bpftool6.18 · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| bpftool6.18-debuginfo · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| dtb-aarch64 · opensuse-leap 16.0 | 6.12.0-160000.36.1 | OPENSUSE-SU-2026:21388-1 | Jul 21, 2026 |
| kernel-64kb · opensuse-leap 16.0 | 6.12.0-160000.36.1 | OPENSUSE-SU-2026:21388-1 | Jul 21, 2026 |
| kernel-64kb · sles 16.0 | 6.12.0-160000.36.1 | SUSE-SU-2026:22835-1 | Jul 21, 2026 |
| kernel-azure · opensuse-leap 16.0 | 6.12.0-160000.36.1 | OPENSUSE-SU-2026:21388-1 | Jul 21, 2026 |
| kernel-azure · sles 16.0 | 6.12.0-160000.36.1 | SUSE-SU-2026:22835-1 | Jul 21, 2026 |
| kernel-default · opensuse-leap 16.0 | 6.12.0-160000.36.1 | OPENSUSE-SU-2026:21388-1 | Jul 21, 2026 |
| kernel-default · sles 16.0 | 6.12.0-160000.36.1 | SUSE-SU-2026:22835-1 | Jul 21, 2026 |
| kernel-default-base · opensuse-leap 16.0 | 6.12.0-160000.36.1.160000.2.17 | OPENSUSE-SU-2026:21388-1 | Jul 21, 2026 |
| kernel-default-base · sles 16.0 | 6.12.0-160000.36.1.160000.2.17 | SUSE-SU-2026:22835-1 | Jul 21, 2026 |
| kernel-docs · opensuse-leap 16.0 | 6.12.0-160000.36.1 | OPENSUSE-SU-2026:21388-1 | Jul 21, 2026 |
| kernel-docs · sles 16.0 | 6.12.0-160000.36.1 | SUSE-SU-2026:22835-1 | Jul 21, 2026 |
| kernel-kvmsmall · opensuse-leap 16.0 | 6.12.0-160000.36.1 | OPENSUSE-SU-2026:21388-1 | Jul 21, 2026 |
| kernel-kvmsmall · sles 16.0 | 6.12.0-160000.36.1 | SUSE-SU-2026:22835-1 | Jul 21, 2026 |
| kernel-livepatch-6.12.92-122.166 · amzn 2023 | 1:1.0-0.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| kernel-livepatch-6.18.33-63.124 · amzn 2023 | 1:1.0-0.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| kernel-obs-build · opensuse-leap 16.0 | 6.12.0-160000.36.1 | OPENSUSE-SU-2026:21388-1 | Jul 21, 2026 |
| kernel-obs-qa · opensuse-leap 16.0 | 6.12.0-160000.36.1 | OPENSUSE-SU-2026:21388-1 | Jul 21, 2026 |
| kernel-obs-qa · sles 16.0 | 6.12.0-160000.36.1 | SUSE-SU-2026:22835-1 | Jul 21, 2026 |
| kernel-rt · opensuse-leap 16.0 | 6.12.0-160000.36.1 | OPENSUSE-SU-2026:21388-1 | Jul 21, 2026 |
| kernel-source · opensuse-leap 16.0 | 6.12.0-160000.36.1 | OPENSUSE-SU-2026:21388-1 | Jul 21, 2026 |
| kernel-source · sles 16.0 | 6.12.0-160000.36.1 | SUSE-SU-2026:22835-1 | Jul 21, 2026 |
| kernel-syms · opensuse-leap 16.0 | 6.12.0-160000.36.1 | OPENSUSE-SU-2026:21388-1 | Jul 21, 2026 |
| kernel-syms · sles 16.0 | 6.12.0-160000.36.1 | SUSE-SU-2026:22835-1 | Jul 21, 2026 |
| kernel-zfcpdump · opensuse-leap 16.0 | 6.12.0-160000.36.1 | OPENSUSE-SU-2026:21388-1 | Jul 21, 2026 |
| kernel-zfcpdump · sles 16.0 | 6.12.0-160000.36.1 | SUSE-SU-2026:22835-1 | Jul 21, 2026 |
| kernel6.12 · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| kernel6.12-debuginfo · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| kernel6.12-debuginfo-common-aarch64 · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| kernel6.12-debuginfo-common-x86_64 · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| kernel6.12-devel · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| kernel6.12-headers · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| kernel6.12-modules-extra · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| kernel6.12-modules-extra-common · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| kernel6.12-tools · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| kernel6.12-tools-debuginfo · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| kernel6.12-tools-devel · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| kernel6.18 · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| kernel6.18-debuginfo · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| kernel6.18-debuginfo-common-aarch64 · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| kernel6.18-debuginfo-common-x86_64 · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| kernel6.18-devel · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| kernel6.18-headers · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| kernel6.18-modules-extra · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| kernel6.18-modules-extra-common · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| kernel6.18-tools · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| kernel6.18-tools-debuginfo · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| kernel6.18-tools-devel · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| linux · Debian 13.5 (trixie) | 6.12.94-1 | DEBIAN-CVE-2026-53015 | Jun 25, 2026 |
| linux · Debian 14 | 7.0.10-1 | DEBIAN-CVE-2026-53015 | Jun 25, 2026 |
| perf6.12 · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| perf6.12-debuginfo · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| perf6.18 · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| perf6.18-debuginfo · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| python3-perf6.12 · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| python3-perf6.12-debuginfo · amzn 2023 | 1:6.12.92-122.166.amzn2023 | ALAS2023-2026-1894 | Jun 22, 2026 |
| python3-perf6.18 · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
| python3-perf6.18-debuginfo · amzn 2023 | 1:6.18.33-63.124.amzn2023 | ALAS2023-2026-1866 | Jun 22, 2026 |
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