PT-2026-43756 · Linux+2 · Linux+90
Published
2026-05-27
·
Updated
2026-05-27
·
CVE-2026-45889
None
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Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
An issue exists in the Multipath TCP (MPTCP) implementation where accounting for Out-of-Order (OoO) packets in the
mptcp rcvbuf grow() function causes the receive buffer to drift toward tcp rmem[2]. This occurs because MPTCP-level OoOs are normal when multiple subflows are active and do not result from packet drops or cause retransmissions. Additionally, a race condition exists during rcvspace initialization; if user-space holds the msk-level socket lock, initialization could complete in the receive callback, allowing the first OoO data to reach the receive buffer and potentially trigger a divide-by-zero Oops (a kernel panic caused by a fatal error).Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
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Related Identifiers
Affected Products
Linux
Linux-Allwinner-5.19
Linux-Aws-5.0
Linux-Aws-5.11
Linux-Aws-5.13
Linux-Aws-5.19
Linux-Aws-5.3
Linux-Aws-5.8
Linux-Aws-6.14
Linux-Aws-6.2
Linux-Aws-6.5
Linux-Azure
Linux-Azure-5.11
Linux-Azure-5.13
Linux-Azure-5.19
Linux-Azure-5.3
Linux-Azure-5.8
Linux-Azure-6.11
Linux-Azure-6.2
Linux-Azure-6.5
Linux-Azure-Edge
Linux-Azure-Fde
Linux-Azure-Fde-5.19
Linux-Azure-Fde-6.2
Linux-Bluefield
Linux-Gcp
Linux-Gcp-5.11
Linux-Gcp-5.13
Linux-Gcp-5.19
Linux-Gcp-5.3
Linux-Gcp-5.8
Linux-Gcp-6.11
Linux-Gcp-6.14
Linux-Gcp-6.2
Linux-Gcp-6.5
Linux-Gke
Linux-Gke-4.15
Linux-Gkeop-5.15
Linux-Gke-5.4
Linux-Gkeop
Linux-Hwe
Linux-Hwe-5.11
Linux-Hwe-5.13
Linux-Hwe-5.19
Linux-Hwe-5.8
Linux-Hwe-6.11
Linux-Hwe-6.14
Linux-Hwe-6.2
Linux-Hwe-6.5
Linux-Hwe-Edge
Linux-Intel-5.13
Linux-Intel-Iot-Realtime
Linux-Lowlatency-Hwe-5.19
Linux-Lowlatency-Hwe-6.11
Linux-Lowlatency-Hwe-6.2
Linux-Lowlatency-Hwe-6.5
Linux-Nvidia-6.11
Linux-Nvidia-6.2
Linux-Nvidia-6.5
Linux-Oem
Linux-Oem-5.10
Linux-Oem-5.13
Linux-Oem-5.14
Linux-Oem-5.17
Linux-Oem-5.6
Linux-Oem-6.0
Linux-Oem-6.1
Linux-Oem-6.11
Linux-Oem-6.14
Linux-Oem-6.5
Linux-Oem-6.8
Linux-Oracle-5.0
Linux-Oracle-5.11
Linux-Oracle-5.13
Linux-Oracle-5.3
Linux-Oracle-5.8
Linux-Oracle-6.14
Linux-Oracle-6.5
Linux-Raspi-Realtime
Linux-Raspi2
Linux-Realtime
Linux-Realtime-6.14
Linux-Riscv
Linux-Riscv-5.11
Linux-Riscv-5.19
Linux-Riscv-5.8
Linux-Riscv-6.14
Linux-Riscv-6.5
Linux-Starfive-5.19
Linux-Starfive-6.2
Linux-Starfive-6.5