Vulnerability Details CVE-2026-52989
In the Linux kernel, the following vulnerability has been resolved:
nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
Currently, when nvmet_tcp_build_pdu_iovec() detects an out-of-bounds
PDU length or offset, it triggers nvmet_tcp_fatal_error(cmd->queue)
and returns early. However, because the function returns void, the
callers are entirely unaware that a fatal error has occurred and
that the cmd->recv_msg.msg_iter was left uninitialized.
Callers such as nvmet_tcp_handle_h2c_data_pdu() proceed to blindly
overwrite the queue state with queue->rcv_state = NVMET_TCP_RECV_DATA
Consequently, the socket receiving loop may attempt to read incoming
network data into the uninitialized iterator.
Fix this by shifting the error handling responsibility to the callers.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 26.3%
CVSS Severity
CVSS v3 Score 9.8
References
- https://git.kernel.org/stable/c/046fa5c72d15cd8e2d592e275697ea399d8f76b0
- https://git.kernel.org/stable/c/3df42a854686fa06484e37ac1a3931c8e3e3453c
- https://git.kernel.org/stable/c/c2a11441538bdbbc5aa003f190995eba93a89b88
- https://git.kernel.org/stable/c/d7c8f95f599b3b38a717d2e771c3f8c174f657c3
- https://git.kernel.org/stable/c/ea8e356acb165cb1fd75537a52e1f66e5e76c538
- https://git.kernel.org/stable/c/f9204a2b78dd18374d3bcf9bf93d9021ce22de1b
- https://access.redhat.com/security/cve/CVE-2026-52989
- https://bugzilla.redhat.com/show_bug.cgi?id=2492443
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52989.json
Products affected by CVE-2026-52989
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cpe:2.3:o:linux:linux_kernel:5.10.250
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cpe:2.3:o:linux:linux_kernel:5.10.251
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cpe:2.3:o:linux:linux_kernel:5.10.252
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cpe:2.3:o:linux:linux_kernel:5.10.253
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cpe:2.3:o:linux:linux_kernel:5.10.254
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cpe:2.3:o:linux:linux_kernel:5.10.255
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cpe:2.3:o:linux:linux_kernel:5.10.256
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cpe:2.3:o:linux:linux_kernel:5.10.257
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cpe:2.3:o:linux:linux_kernel:5.10.258
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cpe:2.3:o:linux:linux_kernel:5.10.259
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cpe:2.3:o:linux:linux_kernel:5.10.260
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cpe:2.3:o:linux:linux_kernel:6.1.163
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cpe:2.3:o:linux:linux_kernel:6.1.164
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cpe:2.3:o:linux:linux_kernel:6.1.165
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cpe:2.3:o:linux:linux_kernel:6.1.167
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cpe:2.3:o:linux:linux_kernel:6.1.168
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cpe:2.3:o:linux:linux_kernel:6.1.169
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cpe:2.3:o:linux:linux_kernel:6.1.170
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cpe:2.3:o:linux:linux_kernel:6.1.171
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cpe:2.3:o:linux:linux_kernel:6.1.173
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cpe:2.3:o:linux:linux_kernel:6.1.174
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cpe:2.3:o:linux:linux_kernel:6.12.70
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cpe:2.3:o:linux:linux_kernel:6.12.72
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cpe:2.3:o:linux:linux_kernel:6.12.74
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cpe:2.3:o:linux:linux_kernel:6.12.75
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cpe:2.3:o:linux:linux_kernel:6.12.77
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cpe:2.3:o:linux:linux_kernel:6.12.78
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cpe:2.3:o:linux:linux_kernel:6.12.80
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cpe:2.3:o:linux:linux_kernel:6.12.81
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cpe:2.3:o:linux:linux_kernel:6.12.82
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cpe:2.3:o:linux:linux_kernel:6.12.83
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cpe:2.3:o:linux:linux_kernel:6.12.84
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cpe:2.3:o:linux:linux_kernel:6.12.85
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cpe:2.3:o:linux:linux_kernel:6.12.86
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cpe:2.3:o:linux:linux_kernel:6.12.87
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cpe:2.3:o:linux:linux_kernel:6.12.88
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cpe:2.3:o:linux:linux_kernel:6.12.89
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cpe:2.3:o:linux:linux_kernel:6.12.90
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cpe:2.3:o:linux:linux_kernel:6.19
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cpe:2.3:o:linux:linux_kernel:6.19.1
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cpe:2.3:o:linux:linux_kernel:6.19.10
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cpe:2.3:o:linux:linux_kernel:6.19.11
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cpe:2.3:o:linux:linux_kernel:6.19.12
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cpe:2.3:o:linux:linux_kernel:6.19.13
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cpe:2.3:o:linux:linux_kernel:6.19.14
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cpe:2.3:o:linux:linux_kernel:6.19.3
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cpe:2.3:o:linux:linux_kernel:6.19.4
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cpe:2.3:o:linux:linux_kernel:6.19.6
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cpe:2.3:o:linux:linux_kernel:6.19.7
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cpe:2.3:o:linux:linux_kernel:6.19.8
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cpe:2.3:o:linux:linux_kernel:6.19.9
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cpe:2.3:o:linux:linux_kernel:7.0
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cpe:2.3:o:linux:linux_kernel:7.0.1
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cpe:2.3:o:linux:linux_kernel:7.0.2
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cpe:2.3:o:linux:linux_kernel:7.0.3
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cpe:2.3:o:linux:linux_kernel:7.0.4
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cpe:2.3:o:linux:linux_kernel:7.0.5
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cpe:2.3:o:linux:linux_kernel:7.0.6
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cpe:2.3:o:linux:linux_kernel:7.0.7
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cpe:2.3:o:linux:linux_kernel:7.0.8
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cpe:2.3:o:linux:linux_kernel:7.0.9
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cpe:2.3:o:linux:linux_kernel:7.1