CVSS 4.7 · Medium EPSS 0,31%
Kerentanan Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') pada linux kernel, debian linux. Skor CVSS 3.1 4.7 (Medium) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: ppp: fix race conditions in ppp_fill_forward_path ppp_fill_forward_path() has two race conditions: 1. The ppp->channels list can change between list_empty() and list_first_entry(), as ppp_lock() is not held. If the only channel is deleted in ppp_disconnect_channel(), list_first_entry() may access an empty head or a freed entry, and trigger a panic. 2. pch->chan can be NULL. When ppp_unregister_channel() is called, pch->chan is set to NULL before pch is removed from ppp->channels. Fix these by using a lockless RCU approach: - Use list_first_or_null_rcu() to safely test and access the first list entry. - Convert list modifications on ppp->channels to their RCU variants and add synchronize_net() after removal. - Check for a NULL pch->chan before dereferencing it.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 5.13 hingga sebelum 5.15.190 |
| linux | linux kernel | Versi 5.16 hingga sebelum 6.1.149 |
| linux | linux kernel | Versi 6.2 hingga sebelum 6.6.103 |
| linux | linux kernel | Versi 6.7 hingga sebelum 6.12.44 |
| linux | linux kernel | Versi 6.13 hingga sebelum 6.16.4 |
| linux | linux kernel | Versi 6.17 rc1 |
| linux | linux kernel | Versi 6.17 rc2 |
| debian | debian linux | Versi 11.0 |