# CVE-2024-50017: linux: In the Linux kernel, the following vulnerability has been resolved:  x86/mm/ident_map: Use gbpages only where full GB...

CVE-2024-50017 is fixed in 47 products on 1 platform, first by ALAS2023-2024-549, released February 29, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-50017
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 29, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  x86/mm/ident_map: Use gbpages only where full GB page should be mapped.  When ident_pud_init() uses only GB pages to create identity maps, large ranges of addresses not actually requested can be included in the resulting table; a 4K request will map a full GB.  This can include a lot of extra address space past that requested, including areas marked reserved by the BIOS.  That allows processor speculation into reserved regions, that on UV systems can cause system halts.  Only use GB pages when map creation requests include the full GB page of space.  Fall back to using smaller 2M pages when only portions of a GB page are included in the request.  No attempt is made to coalesce mapping requests. If a request requires a map entry at the 2M (pmd) level, subsequent mapping requests within the same 1G region will also be at the pmd level, even if adjacent or overlapping such requests could have been combined to map a full GB page. Existing usage starts with larger regions and then adds smaller regions, so this should not have any great consequence.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 2024 |
| Linux | bpftool-debuginfo amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 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 amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 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-debuginfo amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 2024 |
| Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 2024 |
| Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 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-devel amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 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-headers amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 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-libbpf amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 2024 |
| Linux | kernel-libbpf-devel amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 2024 |
| Linux | kernel-libbpf-static amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 2024 |
| Linux | kernel-livepatch-6.1.79-99.164 amzn 2023 | 1.0-0.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 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-modules-extra amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 2024 |
| Linux | kernel-modules-extra-common amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 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-tools amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 2024 |
| Linux | kernel-tools-debuginfo amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 2024 |
| Linux | kernel-tools-devel amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 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) | 6.1.190-1 | [DEBIAN-CVE-2024-50017](https://patchblox.com/security/data/fix/linux/debian-cve-2024-50017.md) | Oct 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.11.4-1 | [DEBIAN-CVE-2024-50017](https://patchblox.com/security/data/fix/linux/debian-cve-2024-50017.md) | Oct 21, 2024 |
| Linux | linux Debian 14 | 6.11.4-1 | [DEBIAN-CVE-2024-50017](https://patchblox.com/security/data/fix/linux/debian-cve-2024-50017.md) | Oct 21, 2024 |
| Linux | perf amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 2024 |
| Linux | perf-debuginfo amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 2024 |
| Linux | python3-perf amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 2024 |
| Linux | python3-perf-debuginfo amzn 2023 | 6.1.79-99.164.amzn2023 | [ALAS2023-2024-549](https://patchblox.com/security/data/fix/linux/alas2023-2024-549.md) | Feb 29, 2024 |

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