CVE-2025-22039
ksmbd: fix overflow in dacloffset bounds check
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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
- 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 overflow in dacloffset bounds check The dacloffset field was originally typed as int and used in an unchecked addition, which could overflow and bypass the existing bounds check in both smb_check_perm_dacl() and smb_inherit_dacl(). This could result in out-of-bounds memory access and a kernel crash when dereferencing the DACL pointer. This patch converts dacloffset to unsigned int and uses check_add_overflow() to validate access to the DACL.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
5.15
References 7
git.kernel.org
- stable/c/abbb4ec41867f2cd1c971258e493893bf43bcbd3
- stable/c/8483d7b532be1d1bc149556a2fedf903868c6303
- stable/c/73f074fb5e139cd42ad75089abe4e28a49a30003
- stable/c/6a9cd9ff0fa2bcc30b2bfb8bdb161eb20e44b9dc
- stable/c/6b8d379048b168a0dff5ab1acb975b933f368514
- stable/c/443b373a4df5a2cb9f7b8c4658b2afedeb16397f
- stable/c/beff0bc9d69bc8e733f9bca28e2d3df5b3e10e42