CVSS 7.8 · High EPSS 0,70%
Kerentanan Use After Free pada linux kernel, debian linux. Skor CVSS 3.1 7.8 (High) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: ceph: prevent use-after-free in encode_cap_msg() In fs/ceph/caps.c, in encode_cap_msg(), "use after free" error was caught by KASAN at this line - 'ceph_buffer_get(arg->xattr_buf);'. This implies before the refcount could be increment here, it was freed. In same file, in "handle_cap_grant()" refcount is decremented by this line - 'ceph_buffer_put(ci->i_xattrs.blob);'. It appears that a race occurred and resource was freed by the latter line before the former line could increment it. encode_cap_msg() is called by __send_cap() and __send_cap() is called by ceph_check_caps() after calling __prep_cap(). __prep_cap() is where arg->xattr_buf is assigned to ci->i_xattrs.blob. This is the spot where the refcount must be increased to prevent "use after free" error.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Semua versi sebelum 5.10.210 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.149 |
| linux | linux kernel | Versi 5.16 hingga sebelum 6.1.79 |
| linux | linux kernel | Versi 6.2 hingga sebelum 6.6.18 |
| linux | linux kernel | Versi 6.7 hingga sebelum 6.7.6 |
| linux | linux kernel | Versi 6.8 rc1 |
| linux | linux kernel | Versi 6.8 rc2 |
| linux | linux kernel | Versi 6.8 rc3 |
| debian | debian linux | Versi 10.0 |