Unrated severityNVD Advisory· Published Sep 4, 2024· Updated Nov 3, 2025
x86/mm: Fix pti_clone_pgtable() alignment assumption
CVE-2024-44965
Description
In the Linux kernel, the following vulnerability has been resolved:
x86/mm: Fix pti_clone_pgtable() alignment assumption
Guenter reported dodgy crashes on an i386-nosmp build using GCC-11 that had the form of endless traps until entry stack exhaust and then #DF from the stack guard.
It turned out that pti_clone_pgtable() had alignment assumptions on the start address, notably it hard assumes start is PMD aligned. This is true on x86_64, but very much not true on i386.
These assumptions can cause the end condition to malfunction, leading to a 'short' clone. Guess what happens when the user mapping has a short copy of the entry text?
Use the correct increment form for addr to avoid alignment assumptions.
Affected products
54- osv-coords53 versionspkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-debug&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-rt_debug&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-source-azure&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-source-rt&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-syms-azure&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-syms-rt&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2015.6pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6pkg:rpm/suse/kernel-coco_debug&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-coco&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-livepatch-MICRO-6-0-RT_Update_3&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-livepatch-MICRO-6-0_Update_3&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-livepatch-SLE15-SP6-RT_Update_4&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/suse/kernel-livepatch-SLE15-SP6_Update_5&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-rt_debug&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6pkg:rpm/suse/kernel-source-coco&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6pkg:rpm/suse/kernel-syms-coco&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6
< 6.4.0-150600.23.25.1+ 52 more
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.8.14.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.23.25.1.150600.12.10.2
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.23.25.2
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.23.25.2
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 6.4.0-150600.8.14.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 6.4.0-150600.8.14.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.8.14.1
- (no CPE)range: < 6.4.0-15061.6.coco15sp6.1
- (no CPE)range: < 6.4.0-15061.6.coco15sp6.1
- (no CPE)range: < 6.4.0-150600.23.25.1.150600.12.10.2
- (no CPE)range: < 6.4.0-17.1.1.51
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-20.1
- (no CPE)range: < 6.4.0-150600.23.25.2
- (no CPE)range: < 6.4.0-20.1
- (no CPE)range: < 1-1.2
- (no CPE)range: < 1-1.2
- (no CPE)range: < 1-150600.1.3.1
- (no CPE)range: < 1-150600.13.3.1
- (no CPE)range: < 6.4.0-150600.23.25.2
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 6.4.0-11.1
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 6.4.0-150600.8.14.1
- (no CPE)range: < 6.4.0-15061.6.coco15sp6.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-20.1
- (no CPE)range: < 6.4.0-11.1
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 6.4.0-150600.8.14.1
- (no CPE)range: < 6.4.0-15061.6.coco15sp6.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 6.4.0-150600.23.25.1
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
8- git.kernel.org/stable/c/18da1b27ce16a14a9b636af9232acb4fb24f4c9emitre
- git.kernel.org/stable/c/25a727233a40a9b33370eec9f0cad67d8fd312f8mitre
- git.kernel.org/stable/c/41e71dbb0e0a0fe214545fe64af031303a08524cmitre
- git.kernel.org/stable/c/4d143ae782009b43b4f366402e5c37f59d4e4346mitre
- git.kernel.org/stable/c/5c580c1050bcbc15c3e78090859d798dcf8c9763mitre
- git.kernel.org/stable/c/ca07aab70dd3b5e7fddb62d7a6ecd7a7d6d0b2edmitre
- git.kernel.org/stable/c/d00c9b4bbc442d99e1dafbdfdab848bc1ead73f6mitre
- git.kernel.org/stable/c/df3eecb5496f87263d171b254ca6e2758ab3c35cmitre
News mentions
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