# CVE-2024-45025: linux: In the Linux kernel, the following vulnerability has been resolved:  fix bitmap corruption on close_range() with CLOS...

CVE-2024-45025 is fixed in 44 products on 1 platform, first by DEBIAN-CVE-2024-45025, released September 11, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-45025
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 11, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  fix bitmap corruption on close_range() with CLOSE_RANGE_UNSHARE  copy_fd_bitmaps(new, old, count) is expected to copy the first count/BITS_PER_LONG bits from old->full_fds_bits[] and fill the rest with zeroes.  What it does is copying enough words (BITS_TO_LONGS(count/BITS_PER_LONG)), then memsets the rest. That works fine, *if* all bits past the cutoff point are clear.  Otherwise we are risking garbage from the last word we'd copied.  For most of the callers that is true - expand_fdtable() has count equal to old->max_fds, so there's no open descriptors past count, let alone fully occupied words in ->open_fds[], which is what bits in ->full_fds_bits[] correspond to.  The other caller (dup_fd()) passes sane_fdtable_size(old_fdt, max_fds), which is the smallest multiple of BITS_PER_LONG that covers all opened descriptors below max_fds.  In the common case (copying on fork()) max_fds is ~0U, so all opened descriptors will be below it and we are fine, by the same reasons why the call in expand_fdtable() is safe.  Unfortunately, there is a case where max_fds is less than that and where we might, indeed, end up with junk in ->full_fds_bits[] - close_range(from, to, CLOSE_RANGE_UNSHARE) with 	* descriptor table being currently shared 	* 'to' being above the current capacity of descriptor table 	* 'from' being just under some chunk of opened descriptors. In that case we end up with observably wrong behaviour - e.g. spawn a child with CLONE_FILES, get all descriptors in range 0..127 open, then close_range(64, ~0U, CLOSE_RANGE_UNSHARE) and watch dup(0) ending up with descriptor #128, despite #64 being observably not open.  The minimally invasive fix would be to deal with that in dup_fd(). If this proves to add measurable overhead, we can go that way, but let's try to fix copy_fd_bitmaps() first.  * new helper: bitmap_copy_and_expand(to, from, bits_to_copy, size). * make copy_fd_bitmaps() take the bitmap size in words, rather than bits; it's 'count' argument is always a multiple of BITS_PER_LONG, so we are not losing any information, and that way we can use the same helper for all three bitmaps - compiler will see that count is a multiple of BITS_PER_LONG for the large ones, so it'll generate plain memcpy()+memset().  Reproducer added to tools/testing/selftests/core/close_range_test.c

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool ol 8 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | bpftool ol 9 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | dtb-aarch64 opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-64kb opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-64kb sles 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-azure opensuse-leap 15.6 | 6.4.0-150600.8.17.2 | [SUSE-SU-2024:3984-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3984-1.md) | Nov 13, 2024 |
| Linux | kernel-azure sles 15.6 | 6.4.0-150600.8.17.2 | [SUSE-SU-2024:3984-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3984-1.md) | Nov 13, 2024 |
| Linux | kernel-coco sles 15.6 | 6.4.0-15061.9.coco15sp6.1 | [SUSE-SU-2024:4387-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4387-1.md) | Dec 19, 2024 |
| Linux | kernel-coco_debug sles 15.6 | 6.4.0-15061.9.coco15sp6.1 | [SUSE-SU-2024:4387-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4387-1.md) | Dec 19, 2024 |
| Linux | kernel-debug opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-default opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-default sles 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-default-base opensuse-leap 15.6 | 6.4.0-150600.23.30.1.150600.12.12.6 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-default-base sles 15.6 | 6.4.0-150600.23.30.1.150600.12.12.6 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-docs opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-docs sles 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-kvmsmall opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-livepatch-SLE15-SP6-RT_Update_5 sles 15.6 | 1-150600.1.3.1 | [SUSE-SU-2024:3986-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3986-1.md) | Nov 13, 2024 |
| Linux | kernel-livepatch-SLE15-SP6_Update_6 sles 15.6 | 1-150600.13.3.5 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-obs-build opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-obs-build sles 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-obs-qa opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-rt opensuse-leap 15.6 | 6.4.0-150600.10.17.1 | [SUSE-SU-2024:3986-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3986-1.md) | Nov 13, 2024 |
| Linux | kernel-rt_debug opensuse-leap 15.6 | 6.4.0-150600.10.17.1 | [SUSE-SU-2024:3986-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3986-1.md) | Nov 13, 2024 |
| Linux | kernel-source opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-source sles 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-source-azure opensuse-leap 15.6 | 6.4.0-150600.8.17.1 | [SUSE-SU-2024:3984-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3984-1.md) | Nov 13, 2024 |
| Linux | kernel-source-azure sles 15.6 | 6.4.0-150600.8.17.1 | [SUSE-SU-2024:3984-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3984-1.md) | Nov 13, 2024 |
| Linux | kernel-source-coco sles 15.6 | 6.4.0-15061.9.coco15sp6.1 | [SUSE-SU-2024:4387-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4387-1.md) | Dec 19, 2024 |
| Linux | kernel-source-rt opensuse-leap 15.6 | 6.4.0-150600.10.17.1 | [SUSE-SU-2024:3986-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3986-1.md) | Nov 13, 2024 |
| Linux | kernel-syms opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-syms sles 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-syms-azure opensuse-leap 15.6 | 6.4.0-150600.8.17.1 | [SUSE-SU-2024:3984-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3984-1.md) | Nov 13, 2024 |
| Linux | kernel-syms-azure sles 15.6 | 6.4.0-150600.8.17.1 | [SUSE-SU-2024:3984-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3984-1.md) | Nov 13, 2024 |
| Linux | kernel-syms-coco sles 15.6 | 6.4.0-15061.9.coco15sp6.1 | [SUSE-SU-2024:4387-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4387-1.md) | Dec 19, 2024 |
| Linux | kernel-syms-rt opensuse-leap 15.6 | 6.4.0-150600.10.17.1 | [SUSE-SU-2024:3986-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3986-1.md) | Nov 13, 2024 |
| Linux | kernel-uek ol 8 | 0:5.4.17-2136.337.5.el8uek | [ELSA-2024-12813](https://patchblox.com/security/data/fix/linux/elsa-2024-12813.md) | Nov 12, 2024 |
| Linux | kernel-uek ol 8 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek ol 9 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-container ol 8 | 0:5.4.17-2136.337.5.el8uek | [ELSA-2024-12813](https://patchblox.com/security/data/fix/linux/elsa-2024-12813.md) | Nov 12, 2024 |
| Linux | kernel-uek-container ol 8 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-container ol 9 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-container-debug ol 8 | 0:5.4.17-2136.337.5.el8uek | [ELSA-2024-12813](https://patchblox.com/security/data/fix/linux/elsa-2024-12813.md) | Nov 12, 2024 |
| Linux | kernel-uek-container-debug ol 8 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-container-debug ol 9 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-core ol 8 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-core ol 9 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-debug ol 8 | 0:5.4.17-2136.337.5.el8uek | [ELSA-2024-12813](https://patchblox.com/security/data/fix/linux/elsa-2024-12813.md) | Nov 12, 2024 |
| Linux | kernel-uek-debug ol 8 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-debug ol 9 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-debug-core ol 8 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-debug-core ol 9 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-debug-devel ol 8 | 0:5.4.17-2136.337.5.el8uek | [ELSA-2024-12813](https://patchblox.com/security/data/fix/linux/elsa-2024-12813.md) | Nov 12, 2024 |
| Linux | kernel-uek-debug-devel ol 8 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-debug-devel ol 9 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-debug-modules ol 8 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-debug-modules ol 9 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-debug-modules-extra ol 8 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-debug-modules-extra ol 9 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-devel ol 8 | 0:5.4.17-2136.337.5.el8uek | [ELSA-2024-12813](https://patchblox.com/security/data/fix/linux/elsa-2024-12813.md) | Nov 12, 2024 |
| Linux | kernel-uek-devel ol 8 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-devel ol 9 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-doc ol 8 | 0:5.4.17-2136.337.5.el8uek | [ELSA-2024-12813](https://patchblox.com/security/data/fix/linux/elsa-2024-12813.md) | Nov 12, 2024 |
| Linux | kernel-uek-doc ol 8 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-doc ol 9 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-modules ol 8 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-modules ol 9 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-modules-extra ol 8 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-modules-extra ol 9 | 0:5.15.0-302.167.6.el9uek | [ELSA-2024-12815](https://patchblox.com/security/data/fix/linux/elsa-2024-12815.md) | Nov 11, 2024 |
| Linux | kernel-uek-tools ol 8 | 0:5.4.17-2136.337.5.el7uek | [ELSA-2024-12813](https://patchblox.com/security/data/fix/linux/elsa-2024-12813.md) | Nov 12, 2024 |
| Linux | kernel-uek-tools-libs ol 8 | 0:5.4.17-2136.337.5.el7uek | [ELSA-2024-12813](https://patchblox.com/security/data/fix/linux/elsa-2024-12813.md) | Nov 12, 2024 |
| Linux | kernel-zfcpdump opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-zfcpdump sles 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | linux Debian 12.15 (bookworm) | 6.1.112-1 | [DEBIAN-CVE-2024-45025](https://patchblox.com/security/data/fix/linux/debian-cve-2024-45025.md) | Sep 11, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.10.7-1 | [DEBIAN-CVE-2024-45025](https://patchblox.com/security/data/fix/linux/debian-cve-2024-45025.md) | Sep 11, 2024 |
| Linux | linux Debian 14 | 6.10.7-1 | [DEBIAN-CVE-2024-45025](https://patchblox.com/security/data/fix/linux/debian-cve-2024-45025.md) | Sep 11, 2024 |
| Linux | perf ol 8 | 0:5.4.17-2136.337.5.el7uek | [ELSA-2024-12813](https://patchblox.com/security/data/fix/linux/elsa-2024-12813.md) | Nov 12, 2024 |
| Linux | python-perf ol 8 | 0:5.4.17-2136.337.5.el7uek | [ELSA-2024-12813](https://patchblox.com/security/data/fix/linux/elsa-2024-12813.md) | Nov 12, 2024 |

---

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