CVE-2026-43245

Summary

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

ntfs: ->d_compare() must not block

… so don't use __getname() there. Switch it (and ntfs_d_hash(), while we are at it) to kmalloc(PATH_MAX, GFP_NOWAIT). Yes, ntfs_d_hash() almost certainly can do with smaller allocations, but let ntfs folks deal with that - keep the allocation size as-is for now.

Stop abusing names_cachep in ntfs, period - various uses of that thing in there have nothing to do with pathnames; just use k[mz]alloc() and be done with that. For now let's keep sizes as-in, but AFAICS none of the users actually want PATH_MAX.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa3a956c78efaa202b1d75190136671cf6e87bfbe < 02ecc0978c459fd90bb24b2a946dd16d43e68fe5affected
LinuxLinuxa3a956c78efaa202b1d75190136671cf6e87bfbe < 1be7ca86ce1794d966fda5d82181bc978b150fbcaffected
LinuxLinuxa3a956c78efaa202b1d75190136671cf6e87bfbe < 142c444a395f4d26055c8a4473e228bb86283f1eaffected
LinuxLinuxa3a956c78efaa202b1d75190136671cf6e87bfbe < fb4b1f969ba01fa1d4088467a02fc1e5f0806710affected
LinuxLinuxa3a956c78efaa202b1d75190136671cf6e87bfbe < ca2a04e84af79596e5cd9cfe697d5122ec39c8ceaffected
LinuxLinux6.2affected
LinuxLinux0 < 6.2unaffected
LinuxLinux6.6.141 <= 6.6.*unaffected
LinuxLinux6.12.91 <= 6.12.*unaffected
LinuxLinux6.18.16 <= 6.18.*unaffected
LinuxLinux6.19.6 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References