{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52989","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-06-09T07:44:35.376Z","datePublished":"2026-06-24T16:29:03.398Z","dateUpdated":"2026-06-30T12:09:41.098Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-06-28T06:37:43.647Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers\n\nCurrently, when nvmet_tcp_build_pdu_iovec() detects an out-of-bounds\nPDU length or offset, it triggers nvmet_tcp_fatal_error(cmd->queue)\nand returns early. However, because the function returns void, the\ncallers are entirely unaware that a fatal error has occurred and\nthat the cmd->recv_msg.msg_iter was left uninitialized.\n\nCallers such as nvmet_tcp_handle_h2c_data_pdu() proceed to blindly\noverwrite the queue state with queue->rcv_state = NVMET_TCP_RECV_DATA\nConsequently, the socket receiving loop may attempt to read incoming\nnetwork data into the uninitialized iterator.\n\nFix this by shifting the error handling responsibility to the callers."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/target/tcp.c"],"versions":[{"version":"1385be357e8acd09b36e026567f3a9d5c61139de","lessThan":"3df42a854686fa06484e37ac1a3931c8e3e3453c","status":"affected","versionType":"git"},{"version":"dca1a6ba0da9f472ef040525fab10fd9956db59f","lessThan":"d7c8f95f599b3b38a717d2e771c3f8c174f657c3","status":"affected","versionType":"git"},{"version":"19672ae68d52ff75347ebe2420dde1b07adca09f","lessThan":"f9204a2b78dd18374d3bcf9bf93d9021ce22de1b","status":"affected","versionType":"git"},{"version":"ab200d71553bdcf4de554a5985b05b2dd606bc57","lessThan":"c2a11441538bdbbc5aa003f190995eba93a89b88","status":"affected","versionType":"git"},{"version":"52a0a98549344ca20ad81a4176d68d28e3c05a5c","lessThan":"046fa5c72d15cd8e2d592e275697ea399d8f76b0","status":"affected","versionType":"git"},{"version":"52a0a98549344ca20ad81a4176d68d28e3c05a5c","lessThan":"ea8e356acb165cb1fd75537a52e1f66e5e76c538","status":"affected","versionType":"git"},{"version":"043b4307a99f902697349128fde93b2ddde4686c","status":"affected","versionType":"git"},{"version":"42afe8ed8ad2de9c19457156244ef3e1eca94b5d","status":"affected","versionType":"git"},{"version":"6.1.163","lessThan":"6.1.175","status":"affected","versionType":"semver"},{"version":"6.6.124","lessThan":"6.6.141","status":"affected","versionType":"semver"},{"version":"6.12.70","lessThan":"6.12.91","status":"affected","versionType":"semver"},{"version":"6.18.10","lessThan":"6.18.33","status":"affected","versionType":"semver"},{"version":"5.10.250","lessThan":"5.11","status":"affected","versionType":"semver"},{"version":"5.15.200","lessThan":"5.16","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/target/tcp.c"],"versions":[{"version":"6.19","status":"affected"},{"version":"0","lessThan":"6.19","status":"unaffected","versionType":"semver"},{"version":"6.1.175","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.141","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.91","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.33","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.10","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.163","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.124","versionEndExcluding":"6.6.141"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.70","versionEndExcluding":"6.12.91"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18.10","versionEndExcluding":"6.18.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.250"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.200"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/3df42a854686fa06484e37ac1a3931c8e3e3453c"},{"url":"https://git.kernel.org/stable/c/d7c8f95f599b3b38a717d2e771c3f8c174f657c3"},{"url":"https://git.kernel.org/stable/c/f9204a2b78dd18374d3bcf9bf93d9021ce22de1b"},{"url":"https://git.kernel.org/stable/c/c2a11441538bdbbc5aa003f190995eba93a89b88"},{"url":"https://git.kernel.org/stable/c/046fa5c72d15cd8e2d592e275697ea399d8f76b0"},{"url":"https://git.kernel.org/stable/c/ea8e356acb165cb1fd75537a52e1f66e5e76c538"}],"title":"nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"affected":[{"cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"},{"cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unaffected","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"},{"cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"},{"cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"},{"cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}],"datePublic":"2026-06-24T00:00:00.000Z","descriptions":[{"lang":"en","value":"A flaw was found in the `nvmet-tcp` component of the Linux kernel. The `nvmet_tcp_build_pdu_iovec()` function fails to propagate errors when detecting out-of-bounds PDU lengths or offsets. This can lead to uninitialized memory being used by subsequent operations, such as reading incoming network data into an uninitialized iterator. A remote attacker could potentially exploit this memory corruption to cause a denial of service or achieve arbitrary code execution."}],"metrics":[{"other":{"content":{"namespace":"https://access.redhat.com/security/updates/classification/","value":"Important"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-390","description":"Detection of Error Condition Without Action","lang":"en","type":"CWE"}]}],"references":[{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-52989"},{"name":"RHBZ#2492443","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492443"},{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52989.json"}],"timeline":[{"lang":"en","time":"2026-06-24T00:00:00.000Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-06-24T00:00:00.000Z","value":"Made public."}],"title":"kernel: nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers","x_adpType":"supplier","x_generator":{"engine":"sadp-cli 1.0.0"},"providerMetadata":{"orgId":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","shortName":"redhat-SADP","dateUpdated":"2026-06-30T12:09:41.098Z"}}]}}