Skip to content
CVE PROGRAM SOURCE RECORD9.8 Critical

CVE-2026-64534

nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

Description

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().

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 91edfca6f8b364d60cde3ddefaf7d03ddf35774b to < 22ec7a9fe9153d2737ee9b2fa6d2e43a1491decfaffected
  • fda871c0ba5d2eed2cd1c881573168129da70058 to < ba35b1c674ca3841c0dfadd698f2c1b3ec542d4eaffected
  • fda871c0ba5d2eed2cd1c881573168129da70058 to < c7874dad84b20433c0fe3919f291a762d40de08baffected
  • fda871c0ba5d2eed2cd1c881573168129da70058 to < e602c93b25bda4a9d0ff1791a4bdbfdcbb074af1affected
  • fda871c0ba5d2eed2cd1c881573168129da70058 to < d306da8833e75f669d93424fd84940236f3850bcaffected
  • fda871c0ba5d2eed2cd1c881573168129da70058 to < 2ed3c9d955e8cd6361f130623baa664a75fb345faffected
  • fda871c0ba5d2eed2cd1c881573168129da70058 to < 4606467a75cfc16721937272ed29462a750b60c8affected
  • 4b17476d809273617d3317fa0d4ae78aa488d760affected
  • 5.10.20 to < 5.10.261affected
  • 5.11.3 to < 5.12affected

Linux Linux

Default version status: affected

  • 5.12affected
  • 0 to < 5.12unaffected
  • 5.10.261 to ≤ 5.10.*unaffected
  • 5.15.212 to ≤ 5.15.*unaffected
  • 6.1.178 to ≤ 6.1.*unaffected
  • 6.6.145 to ≤ 6.6.*unaffected
  • 6.12.97 to ≤ 6.12.*unaffected
  • 6.18.40 to ≤ 6.18.*unaffected
  • 7.1 to ≤ *unaffected

References