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: net: skmsg: preserve sg.copy across SG transforms The sk_msg sg.copy bitmap is part of the scatterlist entry ownership state. A set bit tells sk_msg_compute_data_pointers() not to expose the entry through writable BPF ctx->data. This protects entries backed by pages that are not private to the sk_msg, such as splice-backed file page-cache pages. Several sk_msg transform paths move, copy, split, or compact msg->sg.data[] entries without moving the matching sg.copy bit. This can make an externally backed entry arrive at a new slot with a clear copy bit. A later SK_MSG verdict can then expose sg_virt(sge) as writable ctx->data and BPF stores can modify the original page cache. Keep sg.copy synchronized with sg.data[] whenever entries are transferred, shifted, split, or copied into a new sk_msg. Clear the bit when an entry is replaced by a newly allocated private page or freed. This covers the BPF pull/push/pop helpers, sk_msg_shift_left/right(), sk_msg_xfer(), and tls_split_open_record(), including the partial tail entry created during TLS open-record splitting.
Засегнати продукти
- Linux Linux: d3b18ad31f93d0b6bae105c679018a1ba7daa9ca преди f126eed589eec6f201405abbc398844042ef6d57; d3b18ad31f93d0b6bae105c679018a1ba7daa9ca преди 31a110642b5fb5e61940cbcfb503445ac4f28017; d3b18ad31f93d0b6bae105c679018a1ba7daa9ca преди 9bb86d8184b37503816150c4a6ad3c17dfdbe827; d3b18ad31f93d0b6bae105c679018a1ba7daa9ca преди 0eb4c16c4adb262763bda870a8ed38a1a9dec7ec; d3b18ad31f93d0b6bae105c679018a1ba7daa9ca преди d22cc92bc41290e5783a72375e0843d9435f6001; d3b18ad31f93d0b6bae105c679018a1ba7daa9ca преди 1acdd14c0990dd1cd4b6534f00366d2e6dfce05f; d3b18ad31f93d0b6bae105c679018a1ba7daa9ca преди 21ed9540a8e1906dfcbc1bb82ba9b4de4fa4bd6d; d3b18ad31f93d0b6bae105c679018a1ba7daa9ca преди 406e8a651a7b854c41fecd5117bb282b3a6c2c6b
- Linux Linux: 4.20; преди 4.20; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.177 до 6.1.*; 6.6.144 до 6.6.*; 6.12.95 до 6.12.*; 6.18.38 до 6.18.*; 7.1.3 до 7.1.*; от 7.2 нататък
Вид слабост
История
- 19 юли 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-63830
- https://nvd.nist.gov/vuln/detail/CVE-2026-63830
- https://git.kernel.org/stable/c/f126eed589eec6f201405abbc398844042ef6d57
- https://git.kernel.org/stable/c/31a110642b5fb5e61940cbcfb503445ac4f28017
- https://git.kernel.org/stable/c/9bb86d8184b37503816150c4a6ad3c17dfdbe827
- https://git.kernel.org/stable/c/0eb4c16c4adb262763bda870a8ed38a1a9dec7ec
- https://git.kernel.org/stable/c/d22cc92bc41290e5783a72375e0843d9435f6001
- https://git.kernel.org/stable/c/1acdd14c0990dd1cd4b6534f00366d2e6dfce05f
- https://git.kernel.org/stable/c/21ed9540a8e1906dfcbc1bb82ba9b4de4fa4bd6d
- https://git.kernel.org/stable/c/406e8a651a7b854c41fecd5117bb282b3a6c2c6b