CVE-2026-98405
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix missing iov…
- Risk score
- 66/100
- CVSS
- 8.1 v3.1
- Exploit chance (30 days)
- 0.2%
- Published
- 14 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- In the Linux kernel, the following vulnerability has been resolved: smb: client: fix missing iov bounds check in parse_posix_sids() In parse_posix_sids(), sidsbuf_end is calculated using the server-supplied out_len without being validated against the actual length of the received iov (iov_len). If a server provides an…
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 8.1 high
- Remotely exploitable without logging in
- On your watchlist: linux kernel
References
- https://git.kernel.org/stable/c/2f8ed71aaaba3bc8b19cd9930cc62e63e142b299
- https://git.kernel.org/stable/c/b09d092eb24ad0110f16a9b7c1ed5d2a0c1733dc
- https://git.kernel.org/stable/c/b862996e5105be1293da9cdc85da77b76021c3bd
- https://git.kernel.org/stable/c/d91b9a3b2b38e5ac1b51e9e5b23fe53ad7b49644
- https://git.kernel.org/stable/c/eac6917a42899aad0617bbf04798c5dd946a1fe5
Original description
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix missing iov bounds check in parse_posix_sids() In parse_posix_sids(), sidsbuf_end is calculated using the server-supplied out_len without being validated against the actual length of the received iov (iov_len). If a server provides an inflated out_len, sidsbuf_end will point past the end of the iov. This defeats the bounds guards in posix_info_sid_size(), allowing out-of-bounds reads into adjacent kernel memory. Fix this by rejecting responses where the calculated sidsbuf_end would exceed the received iov boundaries or cause pointer wraparound.
Last activity 14 Oct 2026. Patch Forecast updates every hour.