CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: RDMA/uverbs: Validate wqe_size before using it in ib_uverbs_post_send ib_uverbs_post_send() uses cmd.wqe_size from userspace without any validation before passing it to kmalloc() and using the allocated buffer as struct ib_uverbs_send_wr. If a user provides a small wqe_size value (e.g., 1), kmalloc() will succeed, but subsequent accesses to user_wr->opcode, user_wr->num_sge, and other fields will read beyond the allocated buffer, resulting in an out-of-bounds read from kernel heap memory. This could potentially leak sensitive kernel information to userspace. Additionally, providing an excessively large wqe_size can trigger a WARNING in the memory allocation path, as reported by syzkaller. This is inconsistent with ib_uverbs_unmarshall_recv() which properly validates that wqe_size >= sizeof(struct ib_uverbs_recv_wr) before proceeding. Add the same validation for ib_uverbs_post_send() to ensure wqe_size is at least sizeof(struct ib_uverbs_send_wr).
Засегнати продукти
- Linux Linux: c3bea3d2dc5358e05541527283279102383b0231 преди 9c15ec4cd4e7f57c6bbcb4e73e99290f150dd2a7; c3bea3d2dc5358e05541527283279102383b0231 преди 9b5ac1c15334d46c0dbd49d64a2257b929500163; c3bea3d2dc5358e05541527283279102383b0231 преди 01c9b152647dc70dc06a4a2eff86ebb3b3c76075; c3bea3d2dc5358e05541527283279102383b0231 преди bf1feed1a7886af945f92890493aefd2b5c9928a; c3bea3d2dc5358e05541527283279102383b0231 преди d533425ac1f2925b4fc3e4ed9b9d72362cb23475; c3bea3d2dc5358e05541527283279102383b0231 преди bf4454da8b1e712714628c0a0d6e7845bb40790a; c3bea3d2dc5358e05541527283279102383b0231 преди bef70ff9841990658610512b4a18e4a88c9b4df6; c3bea3d2dc5358e05541527283279102383b0231 преди 1956f0a74ccf5dc9c3ef717f2985c3ed3400aab0
- Linux Linux: 5.0; преди 5.0; 5.10.252 до 5.10.*; 5.15.202 до 5.15.*; 6.1.165 до 6.1.*; 6.6.128 до 6.6.*; 6.12.75 до 6.12.*; 6.18.14 до 6.18.*; 6.19.4 до 6.19.*; от 7.0 нататък
Вид слабост
История
- 27 май 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-45856
- https://nvd.nist.gov/vuln/detail/CVE-2026-45856
- https://git.kernel.org/stable/c/9c15ec4cd4e7f57c6bbcb4e73e99290f150dd2a7
- https://git.kernel.org/stable/c/9b5ac1c15334d46c0dbd49d64a2257b929500163
- https://git.kernel.org/stable/c/01c9b152647dc70dc06a4a2eff86ebb3b3c76075
- https://git.kernel.org/stable/c/bf1feed1a7886af945f92890493aefd2b5c9928a
- https://git.kernel.org/stable/c/d533425ac1f2925b4fc3e4ed9b9d72362cb23475
- https://git.kernel.org/stable/c/bf4454da8b1e712714628c0a0d6e7845bb40790a
- https://git.kernel.org/stable/c/bef70ff9841990658610512b4a18e4a88c9b4df6
- https://git.kernel.org/stable/c/1956f0a74ccf5dc9c3ef717f2985c3ed3400aab0