ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 5.15.222, 5.19, 5.20, 6.1.189, 6.6.158, and 2 more
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling 1. When ndr_decode_v4_ntacl() fails, the code jumped to free_n_data which only freed n.data, skipping kfree(acl.sd_buf) and leaking the buffer. Zero-initialize struct xattr_ntacl acl, reorder error labels to out_free to release acl.sd_buf on all error paths. 2. if (acl.sd_size < sizeof(struct smb_ntsd)) is true, original code returned success without freeing sd_buf and left stale *pntsd. Set rc = -EINVAL before jumping to out_free to return error code and free buffer.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From cb69d4d6f709f87c94afa28ae64c501576692171 · fixed in f46a70a082bdbfecbe074af8a719c26c4deb58c6; From 8f0541186e9ad1b62accc9519cc2b7a7240272a7 · fixed in 86c2625fb9863139b359805fc6be1e31edbd3d65; From 8f0541186e9ad1b62accc9519cc2b7a7240272a7 · fixed in edc17db83085624a2b1bacf6a4521d7f15571737; From 8f0541186e9ad1b62accc9519cc2b7a7240272a7 · fixed in c3836f55e0dab96314774215e12d87f63fa919f2; From 8f0541186e9ad1b62accc9519cc2b7a7240272a7 · fixed in 6e6329322ad733c5b23555c609353841560b26bc; From 8f0541186e9ad1b62accc9519cc2b7a7240272a7 · fixed in d708a36634bb7b6f94d0e76d587d2ec50b2b93b5; From 5.15.62 · fixed in 5.15.222; From 5.18.18 · fixed in 5.19; From 5.19.2 · fixed in 5.20
- Linux Linux
6.0
- KernelLinux
fixed in 5.15.222; From 5.16.0 · fixed in 6.1.189; From 6.0.0 · fixed in 6.6.158; From 6.2.0 · fixed in 6.12.111; From 6.7.0 · fixed in 6.18.53