CVE-2023-54272

Summary

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

fs/ntfs3: Fix a possible null-pointer dereference in ni_clear()

In a previous commit c1006bd13146, ni->mi.mrec in ni_write_inode() could be NULL, and thus a NULL check is added for this variable.

However, in the same call stack, ni->mi.mrec can be also dereferenced in ni_clear():

ntfs_evict_inode(inode) ni_write_inode(inode, …) ni = ntfs_i(inode); is_rec_inuse(ni->mi.mrec) -> Add a NULL check by previous commit ni_clear(ntfs_i(inode)) is_rec_inuse(ni->mi.mrec) -> No check

Thus, a possible null-pointer dereference may exist in ni_clear(). To fix it, a NULL check is added in this function.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux4342306f0f0d5ff4315a204d315c1b51b914fca5 < 20f9bfc664d6a478f9a5bbc0c380f80f7a1a06c6affected
LinuxLinux4342306f0f0d5ff4315a204d315c1b51b914fca5 < 39c6312009574ca73865354133ca222e7753a71baffected
LinuxLinux4342306f0f0d5ff4315a204d315c1b51b914fca5 < e7675f85a92233136c630000a0b7cf97826705daaffected
LinuxLinux4342306f0f0d5ff4315a204d315c1b51b914fca5 < ec275bf9693d19cc0fdce8436f4c425ced86f6e7affected
LinuxLinux5.15affected
LinuxLinux0 < 5.15unaffected
LinuxLinux5.15.113 <= 5.15.*unaffected
LinuxLinux6.1.81 <= 6.1.*unaffected
LinuxLinux6.3.4 <= 6.3.*unaffected
LinuxLinux6.4 <= *unaffected

Weaknesses

References