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Vulnerability · Published Jun 24, 2026 · Assigned by Linux

CVE-2026-52989nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers

Critical 9.8

In plain English

A critical-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.4%top 70.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.176-1DEBIAN-CVE-2026-52989
Debian:13linux6.12.94-1DEBIAN-CVE-2026-52989
Debian:14linux7.0.10-1DEBIAN-CVE-2026-52989
Ubuntu:22.04:LTSlinux5.15.0-187.197UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux5.15.0-187.197USN-8631-1
Ubuntu:24.04:LTSlinux6.8.0-136.136UBUNTU-CVE-2026-52989
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-52989
Ubuntu:26.04:LTSlinux7.0.0-28.28UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-aws5.15.0-1113.120USN-8631-1
Ubuntu:22.04:LTSlinux-aws5.15.0-1113.120UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-aws6.8.0-1061.64UBUNTU-CVE-2026-52989
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-52989
Ubuntu:26.04:LTSlinux-aws7.0.0-1009.9UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1061.64~22.04.1UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-azure5.15.0-1118.127UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-azure5.15.0-1118.127USN-8631-1
Ubuntu:24.04:LTSlinux-azure6.8.0-1063.71UBUNTU-CVE-2026-52989
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2026-52989
Ubuntu:26.04:LTSlinux-azure7.0.0-1010.10UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-azure-6.176.17.0-1022.22USN-8636-1
Ubuntu:24.04:LTSlinux-azure-6.176.17.0-1022.22UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1063.71~22.04.1UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1118.127UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1118.127USN-8631-1
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1062.69UBUNTU-CVE-2026-52989
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-52989
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1009.9UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1062.69~22.04.1UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-gcp5.15.0-1114.124UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-gcp5.15.0-1114.124USN-8661-1
Ubuntu:24.04:LTSlinux-gcp6.8.0-1064.72UBUNTU-CVE-2026-52989
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2026-52989
Ubuntu:26.04:LTSlinux-gcp7.0.0-1008.8UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1022.25UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1022.25USN-8636-1
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1064.72~22.04.1UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-gke5.15.0-1110.116USN-8661-3
Ubuntu:22.04:LTSlinux-gke5.15.0-1110.116UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-gke6.8.0-1059.67UBUNTU-CVE-2026-52989
Ubuntu:26.04:LTSlinux-gke7.0.0-1003.4UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1096.104USN-8631-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1096.104UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1046.50UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-hwe-6.176.17.0-42.42USN-8636-1
Ubuntu:24.04:LTSlinux-hwe-6.176.17.0-42.42UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-136.136~22.04.1UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-28.28~24.04.1UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-ibm5.15.0-1107.111UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-ibm5.15.0-1107.111USN-8631-1
Ubuntu:24.04:LTSlinux-ibm6.8.0-1061.62UBUNTU-CVE-2026-52989
Ubuntu:26.04:LTSlinux-ibm7.0.0-1010.10UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1061.62~22.04.1UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1108.114UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1108.114USN-8631-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1105.110UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-kvm5.15.0-1105.110USN-8631-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-190.200UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-190.200USN-8661-2
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-136.136.2UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-136.136.2~22.04.1UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1108.109USN-8631-1
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1108.109UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1059.62UBUNTU-CVE-2026-52989
Ubuntu:26.04:LTSlinux-nvidia7.0.0-1016.16UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-nvidia-6.176.17.0-1031.31UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1059.62~22.04.1UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-52989
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2016.16UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1059.62.1UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1065.67UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1065.67USN-8631-1
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1030.31UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1054.54USN-8631-3
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1054.54UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1032.32UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1032.32USN-8636-1
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-52989
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1009.9UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-oracle5.15.0-1110.116USN-8631-2
Ubuntu:22.04:LTSlinux-oracle5.15.0-1110.116UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-oracle6.8.0-1058.61UBUNTU-CVE-2026-52989
Ubuntu:25.10linux-oracleno fix listedUBUNTU-CVE-2026-52989
Ubuntu:26.04:LTSlinux-oracle7.0.0-1008.8UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-oracle-6.176.17.0-1020.20USN-8636-2
Ubuntu:24.04:LTSlinux-oracle-6.176.17.0-1020.20UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1058.61~22.04.1UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-raspi5.15.0-1108.111USN-8661-5
Ubuntu:22.04:LTSlinux-raspi5.15.0-1108.111UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-raspi6.8.0-1061.65UBUNTU-CVE-2026-52989
Ubuntu:25.10linux-raspino fix listedUBUNTU-CVE-2026-52989
Ubuntu:26.04:LTSlinux-raspi7.0.0-1015.15UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-52989
Ubuntu:25.10linux-realtimeno fix listedUBUNTU-CVE-2026-52989
Ubuntu:26.04:LTSlinux-realtime7.0.0-28.28.1UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-52989
Ubuntu:25.10linux-riscvno fix listedUBUNTU-CVE-2026-52989
Ubuntu:26.04:LTSlinux-riscv7.0.0-28.28.1UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-136.136~22.04.3UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-28.28.1~24.04.3UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-vmware6.8.0-1008.8UBUNTU-CVE-2026-52989
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1033.34UBUNTU-CVE-2026-52989
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1076.80USN-8631-1
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1076.80UBUNTU-CVE-2026-52989

Affected products (as reported)

VendorProductVersions
Linux Linux 1385be357e8acd09b36e026567f3a9d5c61139de – before 3df42a854686fa06484e37ac1a3931c8e3e3453cdca1a6ba0da9f472ef040525fab10fd9956db59f – before d7c8f95f599b3b38a717d2e771c3f8c174f657c319672ae68d52ff75347ebe2420dde1b07adca09f – before f9204a2b78dd18374d3bcf9bf93d9021ce22de1bab200d71553bdcf4de554a5985b05b2dd606bc57 – before c2a11441538bdbbc5aa003f190995eba93a89b8852a0a98549344ca20ad81a4176d68d28e3c05a5c – before 046fa5c72d15cd8e2d592e275697ea399d8f76b052a0a98549344ca20ad81a4176d68d28e3c05a5c – before ea8e356acb165cb1fd75537a52e1f66e5e76c538043b4307a99f902697349128fde93b2ddde4686c42afe8ed8ad2de9c19457156244ef3e1eca94b5d
Linux Linux 6.19

Weakness: CWE-390 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References