CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката може да се автоматизира
Описание
Оригинално описание
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.
Засегнати продукти
- Linux Linux: f6efc675c9dd8d93f826b79ae7e33e03301db609 преди 9a1969fbffc1f1900d92d7594b1b7d8d72ef3dc7; f6efc675c9dd8d93f826b79ae7e33e03301db609 преди 0f1630be6fcca3f0c63e4b242ad202e5cde28a40; f6efc675c9dd8d93f826b79ae7e33e03301db609 преди ca18d751bcc9faf5b7e82e9fae1223d103928181; f6efc675c9dd8d93f826b79ae7e33e03301db609 преди 94731cc551e29511d85aa8dec61a6c071b1f2430; f6efc675c9dd8d93f826b79ae7e33e03301db609 преди f97f6475fdcb3c28ff3c55cc4b7bde632119ec08; f6efc675c9dd8d93f826b79ae7e33e03301db609 преди 0417adf367a0af11adf7ace849af4638cfb573f7
- Linux Linux: 5.13; преди 5.13; 5.15.190 до 5.15.*; 6.1.149 до 6.1.*; 6.6.103 до 6.6.*; 6.12.44 до 6.12.*; 6.16.4 до 6.16.*; от 6.17 нататък
- Siemens SIMATIC CN 4100: преди V5.0
История
- 5 септември 2025 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2025-39673
- https://nvd.nist.gov/vuln/detail/CVE-2025-39673
- https://git.kernel.org/stable/c/9a1969fbffc1f1900d92d7594b1b7d8d72ef3dc7
- https://git.kernel.org/stable/c/0f1630be6fcca3f0c63e4b242ad202e5cde28a40
- https://git.kernel.org/stable/c/ca18d751bcc9faf5b7e82e9fae1223d103928181
- https://git.kernel.org/stable/c/94731cc551e29511d85aa8dec61a6c071b1f2430
- https://git.kernel.org/stable/c/f97f6475fdcb3c28ff3c55cc4b7bde632119ec08
- https://git.kernel.org/stable/c/0417adf367a0af11adf7ace849af4638cfb573f7
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html