CVE-2026-98405
Açıklama (NVD)
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.
Yayın: 14.10.2026 · Son değişiklik: 24.10.2026
CVSS 3.1 metrikleri
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
| Saldırı vektörü | Ağ (uzaktan) |
| Karmaşıklık | Düşük |
| Gereken yetki | Yok |
| Kullanıcı etkileşimi | Gerekli |
| Kapsam | Değişmez |
| Gizlilik | Yüksek |
| Bütünlük | Yok |
| Erişilebilirlik | Yüksek |
Hesaplanan temel puan: 8.1. CVSS hesaplayıcıda incele
Referanslar
- 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