arm64: mm: fix VA-range sanity check

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2023-53989
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-12-24 11:15:51 UTC
Updated2026-06-01 17:16:25 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: arm64: mm: fix VA-range sanity check Both create_mapping_noalloc() and update_mapping_prot() sanity-check their 'virt' parameter, but the check itself doesn't make much sense. The condition used today appears to be a historical accident. The sanity-check condition: if ((virt >= PAGE_END) && (virt < VMALLOC_START)) { [ ... warning here ... ] return; } ... can only be true for the KASAN shadow region or the module region, and there's no reason to exclude these specifically for creating and updateing mappings. When arm64 support was first upstreamed in commit: c1cc1552616d0f35 ("arm64: MMU initialisation") ... the condition was: if (virt < VMALLOC_START) { [ ... warning here ... ] return; } At the time, VMALLOC_START was the lowest kernel address, and this was checking whether 'virt' would be translated via TTBR1. Subsequently in commit: 14c127c957c1c607 ("arm64: mm: Flip kernel VA space") ... the condition was changed to: if ((virt >= VA_START) && (virt < VMALLOC_START)) { [ ... warning here ... ] return; } This appear to have been a thinko. The commit moved the linear map to the bottom of the kernel address space, with VMALLOC_START being at the halfway point. The old condition would warn for changes to the linear map below this, and at the time VA_START was the end of the linear map. Subsequently we cleaned up the naming of VA_START in commit: 77ad4ce69321abbe ("arm64: memory: rename VA_START to PAGE_END") ... keeping the erroneous condition as: if ((virt >= PAGE_END) && (virt < VMALLOC_START)) { [ ... warning here ... ] return; } Correct the condition to check against the start of the TTBR1 address space, which is currently PAGE_OFFSET. This simplifies the logic, and more clearly matches the "outside kernel range" message in the warning.

Risk And Classification

EPSS: 0.000510000 probability, percentile 0.163290000 (date 2026-06-04)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 14c127c957c1c6070647c171e72f06e0db275ebf 9d8d3df71516ec3236d8d93ff029d251377ba4b1 git Not specified
CNA Linux Linux affected 14c127c957c1c6070647c171e72f06e0db275ebf 32020fc2a8373d3de35ae6d029d5969a42651e7a git Not specified
CNA Linux Linux affected 14c127c957c1c6070647c171e72f06e0db275ebf 621619f626cbe702ddbdc54117f3868b8ebd8129 git Not specified
CNA Linux Linux affected 14c127c957c1c6070647c171e72f06e0db275ebf c7a9e967cc9615a1dabc5e0e6fdbe88a172d5a5b git Not specified
CNA Linux Linux affected 14c127c957c1c6070647c171e72f06e0db275ebf b03c7fcc5ed854d0e1b27e9abf12428bfa751a37 git Not specified
CNA Linux Linux affected 14c127c957c1c6070647c171e72f06e0db275ebf ab9b4008092c86dc12497af155a0901cc1156999 git Not specified
CNA Linux Linux affected 5.4 Not specified
CNA Linux Linux unaffected 5.4 semver Not specified
CNA Linux Linux unaffected 5.4.251 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.188 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.150 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.4.7 6.4.* semver Not specified
CNA Linux Linux unaffected 6.5 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ab9b4008092c86dc12497af155a0901cc1156999 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c7a9e967cc9615a1dabc5e0e6fdbe88a172d5a5b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b03c7fcc5ed854d0e1b27e9abf12428bfa751a37 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/621619f626cbe702ddbdc54117f3868b8ebd8129 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/32020fc2a8373d3de35ae6d029d5969a42651e7a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9d8d3df71516ec3236d8d93ff029d251377ba4b1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report