Veille CVE
CVE-2026-97562
7.5 ÉlevéeDescription
In the Linux kernel, the following vulnerability has been resolved: smb: client: pin DFS superblock in iterator callback tcon_super_cb() stores a raw superblock pointer, but __cifs_get_super() takes its active reference only after iterate_supers_type() has dropped s_umount and its passive reference. Concurrent DFS automount expiry can therefore free the superblock before cifs_sb_active() uses it. A deterministic KASAN test reproduces the race as: BUG: KASAN: slab-use-after-free in cifs_sb_active+0x77/0x80 The same test passes with this change applied. Take the active reference in the callback while iterate_supers_type() still holds s_umount shared. cifs_put_tcp_super() remains the matching release.
Produits concernés
Scores CVSS
| Version | Score | Source | Vecteur |
|---|---|---|---|
| 3.1 | 7.5 Élevée | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
Références
- https://git.kernel.org/stable/c/3c9acc9835c304013a4faeb969fe9333d66ca9f8
- https://git.kernel.org/stable/c/5b01a8c0209690db75341528ec53fd87e0ac1460
- https://git.kernel.org/stable/c/a6b6561522212af852c9ad8a7dca8d59ef2c7377
- https://git.kernel.org/stable/c/d806d5a85dcbe2a0f181b2f0f9f61ddfbefa1818
- https://git.kernel.org/stable/c/ea43a15cea36dc5ddd832be5bddeac7dd804cbcf