CVSS 5.3 · Medium EPSS 0,97%
Kerentanan Improper Locking pada linux kernel, debian linux. Skor CVSS 3.1 5.3 (Medium) menurut CISA ADP.
In the Linux kernel, the following vulnerability has been resolved: sysv: don't call sb_bread() with pointers_lock held syzbot is reporting sleep in atomic context in SysV filesystem [1], for sb_bread() is called with rw_spinlock held. A "write_lock(&pointers_lock) => read_lock(&pointers_lock) deadlock" bug and a "sb_bread() with write_lock(&pointers_lock)" bug were introduced by "Replace BKL for chain locking with sysvfs-private rwlock" in Linux 2.5.12. Then, "[PATCH] err1-40: sysvfs locking fix" in Linux 2.6.8 fixed the former bug by moving pointers_lock lock to the callers, but instead introduced a "sb_bread() with read_lock(&pointers_lock)" bug (which made this problem easier to hit). Al Viro suggested that why not to do like get_branch()/get_block()/ find_shared() in Minix filesystem does. And doing like that is almost a revert of "[PATCH] err1-40: sysvfs locking fix" except that get_branch() from with find_shared() is called without write_lock(&pointers_lock).
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Semua versi sebelum 4.19.312 |
| linux | linux kernel | Versi 4.20 hingga sebelum 5.4.274 |
| linux | linux kernel | Versi 5.5 hingga sebelum 5.10.215 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.155 |
| linux | linux kernel | Versi 5.16 hingga sebelum 6.1.86 |
| linux | linux kernel | Versi 6.2 hingga sebelum 6.6.27 |
| linux | linux kernel | Versi 6.7 hingga sebelum 6.8.6 |
| debian | debian linux | Versi 10.0 |