CVE-2023-54272
N/A
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
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 4342306f0f0d5ff4315a204d315c1b51b914fca5 < 20f9bfc664d6a478f9a5bbc0c380f80f7a1a06c6 | affected |
| Linux | Linux | 4342306f0f0d5ff4315a204d315c1b51b914fca5 < 39c6312009574ca73865354133ca222e7753a71b | affected |
| Linux | Linux | 4342306f0f0d5ff4315a204d315c1b51b914fca5 < e7675f85a92233136c630000a0b7cf97826705da | affected |
| Linux | Linux | 4342306f0f0d5ff4315a204d315c1b51b914fca5 < ec275bf9693d19cc0fdce8436f4c425ced86f6e7 | affected |
| Linux | Linux | 5.15 | affected |
| Linux | Linux | 0 < 5.15 | unaffected |
| Linux | Linux | 5.15.113 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.81 <= 6.1.* | unaffected |
| Linux | Linux | 6.3.4 <= 6.3.* | unaffected |
| Linux | Linux | 6.4 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/20f9bfc664d6a478f9a5bbc0c380f80f7a1a06c6
- https://git.kernel.org/stable/c/39c6312009574ca73865354133ca222e7753a71b
- https://git.kernel.org/stable/c/e7675f85a92233136c630000a0b7cf97826705da
- https://git.kernel.org/stable/c/ec275bf9693d19cc0fdce8436f4c425ced86f6e7
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