CVE-2026-98367 is a vulnerability in Linux Kernel
Published on October 6, 2026
RDMA/siw: Clear association under lock if siw_qp_modify fails in siw_accept
In the Linux kernel, the following vulnerability has been resolved:
RDMA/siw: Clear association under lock if siw_qp_modify fails in siw_accept
We need to clear cep before release state_lock as siw_qp_llp_close and
siw_qp_modify->siw_qp_llp_close did.
Otherwise if siw_qp_modify() fails in siw_accept(), the QP's state_lock
is released before the error path cleanup. A concurrent ibv_modify_qp()
transitioning the QP to ERROR can race in this window:
siw_accept() ibv_modify_qp(ERROR)
---------------------- ----------------------
siw_qp_modify() fails
up_write(&qp->state_lock)
down_write(&qp->state_lock)
nextstate_from_idle():
if (qp->cep)
siw_cep_put(qp->cep) <- frees cep
qp->cep = NULL
goto error
cep->qp = NULL <- UAF
Clear qp->cep and drop the association reference taken by siw_cep_get(),
all under the write lock held from the initial down_write(&qp->state_lock).
Thread B therefore sees qp->cep == NULL, skips its own put, and cannot free
the cep before siw_accept() is done with it.
Products Associated with CVE-2026-98367
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Affected Versions
Linux:- Version 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and below f11e09fe2fc3a11ccdf8f932b68181b0bb1d2078 is affected.
- Version 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and below e3f039082856adab7e195dea1af45d93dd6a3f1c is affected.
- Version 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and below ad50d19f3d1ce052b3a146143581e930a1efb33e is affected.
- Version 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and below 030306bbb9273af80f14d7af20129661964cd9a7 is affected.
- Version 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and below df2584750314336edcbcc21fb388e04b260f35b7 is affected.
- Version 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and below 9dcc0f4e488b70cff81e0e5717a498c929cf5de3 is affected.
- Version 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and below bfdc744bf20ae4c3ef2e470298de5237c5c9a13c is affected.
- Version 6c52fdc244b5ccc468006fd65a504d4ee33743c7 and below 32cd87f54dd1070020e664ccb0312a9f0fea79b4 is affected.
- Version 5.3 is affected.
- Before 5.3 is unaffected.
- Version 5.10.271, <= 5.10.* is unaffected.
- Version 5.15.222, <= 5.15.* is unaffected.
- Version 6.1.189, <= 6.1.* is unaffected.
- Version 6.6.158, <= 6.6.* is unaffected.
- Version 6.12.112, <= 6.12.* is unaffected.
- Version 6.18.54, <= 6.18.* is unaffected.
- Version 7.2.8, <= 7.2.* is unaffected.
- Version 7.3-rc4, <= * is unaffected.