sysfs: don't remove existing directory on update failure

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Summary

CVECVE-2026-64185
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:18:00 UTC
Updated2026-07-19 16:18:00 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: sysfs: don't remove existing directory on update failure When sysfs_update_group() is called for a named group and create_files() fails (e.g. -ENOMEM), internal_create_group() calls kernfs_remove(kn) on the group directory. In the update path, kn was obtained via kernfs_find_and_get() and refers to a directory that already existed before this call. Removing it silently destroys a sysfs group that the caller did not create. Only remove the directory if we created it ourselves. On update failure the directory remains as it is left empty by remove_files() inside create_files(), but can be repopulated by a retry.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c855cf2759d27142f771173d9fd8e7fdf9cf5138 c5e125c828b701afaf7493b42a14aa89362ff36d git Not specified
CNA Linux Linux affected c855cf2759d27142f771173d9fd8e7fdf9cf5138 ccadd32cc1263802a5969c9efe0e96225450428c git Not specified
CNA Linux Linux affected c855cf2759d27142f771173d9fd8e7fdf9cf5138 14f2c14ae86c4af17a0a9f8ab46dacf2d5fd1d8a git Not specified
CNA Linux Linux affected c855cf2759d27142f771173d9fd8e7fdf9cf5138 31527d80234caf83dc96ad478645e57df9de4472 git Not specified
CNA Linux Linux affected c855cf2759d27142f771173d9fd8e7fdf9cf5138 57b285e0368290aa55f79ba11419b96d0ebdb418 git Not specified
CNA Linux Linux affected c855cf2759d27142f771173d9fd8e7fdf9cf5138 48fa96538bd2868034d33429e4565fda384d0736 git Not specified
CNA Linux Linux affected c855cf2759d27142f771173d9fd8e7fdf9cf5138 708f6926f61f71e09b5e9fd668b9882ccd46e69f git Not specified
CNA Linux Linux affected c855cf2759d27142f771173d9fd8e7fdf9cf5138 237557b8a81ab948e8332f7c0058e758f081c0a3 git Not specified
CNA Linux Linux affected 4.19 Not specified
CNA Linux Linux unaffected 4.19 semver Not specified
CNA Linux Linux unaffected 5.10.258 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.142 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.92 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.34 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.11 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/237557b8a81ab948e8332f7c0058e758f081c0a3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/708f6926f61f71e09b5e9fd668b9882ccd46e69f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/48fa96538bd2868034d33429e4565fda384d0736 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ccadd32cc1263802a5969c9efe0e96225450428c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/31527d80234caf83dc96ad478645e57df9de4472 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/57b285e0368290aa55f79ba11419b96d0ebdb418 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/14f2c14ae86c4af17a0a9f8ab46dacf2d5fd1d8a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c5e125c828b701afaf7493b42a14aa89362ff36d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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