CVE-2026-64534: Linux, състезание за ресурс

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path In nvmet_tcp_try_recv_ddgst(), when a data digest mismatch is detected, nvmet_req_uninit() is called unconditionally. However, if the command arrived via the nvmet_tcp_handle_req_failure() path, nvmet_req_init() had returned false and percpu_ref_tryget_live() was never executed. The unconditional percpu_ref_put() inside nvmet_req_uninit() then causes a refcount underflow, leading to a WARNING in percpu_ref_switch_to_atomic_rcu, a use-after-free diagnostic, and eventually a permanent workqueue deadlock. Check cmd->flags & NVMET_TCP_F_INIT_FAILED before calling nvmet_req_uninit(), matching the existing pattern in nvmet_tcp_execute_request().

Засегнати продукти

• Linux Linux: 91edfca6f8b364d60cde3ddefaf7d03ddf35774b преди 22ec7a9fe9153d2737ee9b2fa6d2e43a1491decf; fda871c0ba5d2eed2cd1c881573168129da70058 преди ba35b1c674ca3841c0dfadd698f2c1b3ec542d4e; fda871c0ba5d2eed2cd1c881573168129da70058 преди c7874dad84b20433c0fe3919f291a762d40de08b; fda871c0ba5d2eed2cd1c881573168129da70058 преди e602c93b25bda4a9d0ff1791a4bdbfdcbb074af1; fda871c0ba5d2eed2cd1c881573168129da70058 преди d306da8833e75f669d93424fd84940236f3850bc; fda871c0ba5d2eed2cd1c881573168129da70058 преди 2ed3c9d955e8cd6361f130623baa664a75fb345f; fda871c0ba5d2eed2cd1c881573168129da70058 преди 4606467a75cfc16721937272ed29462a750b60c8; 4b17476d809273617d3317fa0d4ae78aa488d760; 5.10.20 преди 5.10.261; 5.11.3 преди 5.12
• Linux Linux: 5.12; преди 5.12; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; от 7.1 нататък

Вид слабост

• CWE-667 Improper Locking

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-64534
• https://nvd.nist.gov/vuln/detail/CVE-2026-64534
• https://git.kernel.org/stable/c/22ec7a9fe9153d2737ee9b2fa6d2e43a1491decf
• https://git.kernel.org/stable/c/ba35b1c674ca3841c0dfadd698f2c1b3ec542d4e
• https://git.kernel.org/stable/c/c7874dad84b20433c0fe3919f291a762d40de08b
• https://git.kernel.org/stable/c/e602c93b25bda4a9d0ff1791a4bdbfdcbb074af1
• https://git.kernel.org/stable/c/d306da8833e75f669d93424fd84940236f3850bc
• https://git.kernel.org/stable/c/2ed3c9d955e8cd6361f130623baa664a75fb345f
• https://git.kernel.org/stable/c/4606467a75cfc16721937272ed29462a750b60c8