CVE-2026-93210

Summary

In the Linux kernel, the following vulnerability has been resolved:

smb: client: harden DFS cache against invalid target hints

Currently, get_tgt_name() returns ERR_PTR(-ENOENT) when ce->tgthint is NULL, and dfs_cache_noreq_update_tgthint() assumes ce->tgthint is always valid.

In preparation for clearing ce->tgthint in free_tgts(), harden callers of get_tgt_name() against ERR_PTR results and harden dfs_cache_noreq_update_tgthint() against NULL pointer dereferences.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a48328afbc3f63e3b9de8827e2e16c15b17976f7affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6cb7f9fed8f40f28fbd464ca99c946951afc0952affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 66dbcdbb0cadffd12eb8f2b115fd57d384c5109daffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 846f0709559b9e27024e126a80bc7afb76516912affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7e32da6047d9afdae8dd17b87b4c8d97363c4ee2affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < bf86c08123c6ab8c61cc0be1dad7540db93738ffaffected
LinuxLinux0 < 6.1.188affected
LinuxLinux0 < 6.6.157affected
LinuxLinux0 < 6.12.109affected
LinuxLinux0 < 6.18.50affected
LinuxLinux0 < 7.2.4affected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.109 <= 6.12.*unaffected
LinuxLinux6.18.50 <= 6.18.*unaffected
LinuxLinux7.2.4 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References