01 Record
CVE-2026-80586
mptcp: options: reset DSS fields in case of unexpected size
CriticalPUBLISHEDCNA: Linux
CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
02 Description
mptcp: options: reset DSS fields in case of unexpected size
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.39% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 33.8% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Received. NVD last modified this record on 2026-10-16.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-08-26 14:37Z2 MO AGO
- Last updated
- 2026-10-16 19:26Z12 DAYS AGO
- Reserved
- 2026-08-26
- Assigning CNA
- Linux
- Record state
- PUBLISHED
- Severity
- Critical (CVSS 9.8)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-824Access of Uninitialized PointerBase
- Data version
- 5.2
- Document digest
- f56e684d3dfda93972f587d56faa8bd0bb426f8b38d78b0695a711676570b1f4
05 Affected products
VendorProductVersionsPlatforms
LinuxLinux648ef4b88673dadb8463bf0d4b10fbf33d55def8 to < 15e35fdad7a5576bf3f1c8d688877aeb5d1b506b, 648ef4b88673dadb8463bf0d4b10fbf33d55def8 to < b1256090816ec46011601e084be580731df58fc7, 648ef4b88673dadb8463bf0d4b10fbf33d55def8 to < 192878df582c51d440bf7b91a15f297f29f2b596, 648ef4b88673dadb8463bf0d4b10fbf33d55def8 to < 26dac5c9ffb20812b475fdf253eb04fab99cff3b, 648ef4b88673dadb8463bf0d4b10fbf33d55def8 to < 4e80eff5c1c893aca2ac1d202f0b256d2e52ecde, 648ef4b88673dadb8463bf0d4b10fbf33d55def8 to < 1fade1b2ac5b1a4948e538fae7313bea57b5ac36, 648ef4b88673dadb8463bf0d4b10fbf33d55def8 to < 27ed642a4e7e4b5df4b8522c72c457a67e052493, 648ef4b88673dadb8463bf0d4b10fbf33d55def8 to < 35772b4981f38ba8059372cde8753e8e477e98ec, 5.6—
06 References
- git.kernel.orghttps://git.kernel.org/stable/c/15e35fdad7a5576bf3f1c8d688877aeb5d1b506b
- git.kernel.orghttps://git.kernel.org/stable/c/b1256090816ec46011601e084be580731df58fc7
- git.kernel.orghttps://git.kernel.org/stable/c/192878df582c51d440bf7b91a15f297f29f2b596
- git.kernel.orghttps://git.kernel.org/stable/c/26dac5c9ffb20812b475fdf253eb04fab99cff3b
- git.kernel.orghttps://git.kernel.org/stable/c/4e80eff5c1c893aca2ac1d202f0b256d2e52ecde
- git.kernel.orghttps://git.kernel.org/stable/c/1fade1b2ac5b1a4948e538fae7313bea57b5ac36
- git.kernel.orghttps://git.kernel.org/stable/c/27ed642a4e7e4b5df4b8522c72c457a67e052493
- git.kernel.orghttps://git.kernel.org/stable/c/35772b4981f38ba8059372cde8753e8e477e98ec
07 Fixed in
AlmaLinux 8
- bpftool Fixed in 4.18.0-553.178.1.el8_10
- kernel Fixed in 4.18.0-553.178.1.el8_10
- kernel-abi-stablelists Fixed in 4.18.0-553.178.1.el8_10
- kernel-core Fixed in 4.18.0-553.178.1.el8_10
- kernel-cross-headers Fixed in 4.18.0-553.178.1.el8_10
- kernel-debug Fixed in 4.18.0-553.178.1.el8_10
- kernel-debug-core Fixed in 4.18.0-553.178.1.el8_10
- kernel-debug-devel Fixed in 4.18.0-553.178.1.el8_10
- kernel-debug-modules Fixed in 4.18.0-553.178.1.el8_10
- kernel-debug-modules-extra Fixed in 4.18.0-553.178.1.el8_10
- kernel-devel Fixed in 4.18.0-553.178.1.el8_10
- kernel-doc Fixed in 4.18.0-553.178.1.el8_10
- kernel-headers Fixed in 4.18.0-553.178.1.el8_10
- kernel-modules Fixed in 4.18.0-553.178.1.el8_10
- kernel-modules-extra Fixed in 4.18.0-553.178.1.el8_10
- kernel-rt Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-core Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-debug Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-debug-core Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-debug-devel Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-debug-modules Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-debug-modules-extra Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-devel Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-modules Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-modules-extra Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-tools Fixed in 4.18.0-553.178.1.el8_10
- kernel-tools-libs Fixed in 4.18.0-553.178.1.el8_10
- kernel-tools-libs-devel Fixed in 4.18.0-553.178.1.el8_10
- kernel-zfcpdump Fixed in 4.18.0-553.178.1.el8_10
- kernel-zfcpdump-core Fixed in 4.18.0-553.178.1.el8_10
- kernel-zfcpdump-devel Fixed in 4.18.0-553.178.1.el8_10
- kernel-zfcpdump-modules Fixed in 4.18.0-553.178.1.el8_10
- kernel-zfcpdump-modules-extra Fixed in 4.18.0-553.178.1.el8_10
- perf Fixed in 4.18.0-553.178.1.el8_10
- python3-perf Fixed in 4.18.0-553.178.1.el8_10
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- bpftool Fixed in 4.18.0-553.178.1.el8_10
- kernel Fixed in 4.18.0-553.178.1.el8_10
- kernel-abi-stablelists Fixed in 4.18.0-553.178.1.el8_10
- kernel-core Fixed in 4.18.0-553.178.1.el8_10
- kernel-cross-headers Fixed in 4.18.0-553.178.1.el8_10
- kernel-debug Fixed in 4.18.0-553.178.1.el8_10
- kernel-debug-core Fixed in 4.18.0-553.178.1.el8_10
- kernel-debug-devel Fixed in 4.18.0-553.178.1.el8_10
- kernel-debug-modules Fixed in 4.18.0-553.178.1.el8_10
- kernel-debug-modules-extra Fixed in 4.18.0-553.178.1.el8_10
- kernel-devel Fixed in 4.18.0-553.178.1.el8_10
- kernel-doc Fixed in 4.18.0-553.178.1.el8_10
- kernel-headers Fixed in 4.18.0-553.178.1.el8_10
- kernel-modules Fixed in 4.18.0-553.178.1.el8_10
- kernel-modules-extra Fixed in 4.18.0-553.178.1.el8_10
- kernel-rt Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-core Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-debug Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-debug-core Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-debug-devel Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-debug-modules Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-debug-modules-extra Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-devel Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-modules Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-rt-modules-extra Fixed in 4.18.0-553.178.1.rt7.519.el8_10
- kernel-tools Fixed in 4.18.0-553.178.1.el8_10
- kernel-tools-libs Fixed in 4.18.0-553.178.1.el8_10
- kernel-tools-libs-devel Fixed in 4.18.0-553.178.1.el8_10
- kernel-zfcpdump Fixed in 4.18.0-553.178.1.el8_10
- kernel-zfcpdump-core Fixed in 4.18.0-553.178.1.el8_10
- kernel-zfcpdump-devel Fixed in 4.18.0-553.178.1.el8_10
- kernel-zfcpdump-modules Fixed in 4.18.0-553.178.1.el8_10
- kernel-zfcpdump-modules-extra Fixed in 4.18.0-553.178.1.el8_10
- perf Fixed in 4.18.0-553.178.1.el8_10
- python3-perf Fixed in 4.18.0-553.178.1.el8_10
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- linux Fixed in 6.1.187-1
- linux-6.12 Fixed in 6.12.107-1~deb12u1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 6.12.105-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 7.1.10-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux-hwe-edge No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- linux-aws-5.0 No fix yet
- linux-aws-5.3 No fix yet
- linux-azure No fix yet
- linux-azure-5.3 No fix yet
- linux-azure-edge No fix yet
- linux-gcp No fix yet
- linux-gcp-5.3 No fix yet
- linux-gke-4.15 No fix yet
- linux-gke-5.4 No fix yet
- linux-gkeop-5.4 No fix yet
- linux-hwe No fix yet
- linux-hwe-edge No fix yet
- linux-oem No fix yet
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- linux-aws-5.11 No fix yet
- linux-aws-5.13 No fix yet
- linux-aws-5.8 No fix yet
- linux-azure-5.11 No fix yet
- linux-azure-5.13 No fix yet
- linux-azure-5.8 No fix yet
- linux-azure-fde No fix yet
- linux-gcp-5.11 No fix yet
- linux-gcp-5.13 No fix yet
- linux-gcp-5.8 No fix yet
- linux-gke No fix yet
- linux-gke-5.15 No fix yet
- linux-gkeop No fix yet
- linux-gkeop-5.15 No fix yet
- linux-hwe-5.11 No fix yet
- linux-hwe-5.13 No fix yet
- linux-hwe-5.8 No fix yet
- linux-intel-5.13 No fix yet
- linux-oem-5.10 No fix yet
- linux-oem-5.13 No fix yet
- linux-oem-5.14 No fix yet
- linux-oem-5.6 No fix yet
- linux-oracle-5.11 No fix yet
- linux-oracle-5.13 No fix yet
- linux-oracle-5.8 No fix yet
- linux-raspi2 No fix yet
- linux-riscv No fix yet
- linux-riscv-5.11 No fix yet
- linux-riscv-5.8 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- linux No fix yet
- linux-allwinner-5.19 No fix yet
- linux-aws No fix yet
- linux-aws-5.19 No fix yet
- linux-aws-6.2 No fix yet
- linux-aws-6.5 No fix yet
- linux-aws-6.8 No fix yet
- linux-azure No fix yet
- linux-azure-5.19 No fix yet
- linux-azure-6.2 No fix yet
- linux-azure-6.5 No fix yet
- linux-azure-6.8 No fix yet
- linux-azure-fde No fix yet
- linux-azure-fde-5.19 No fix yet
- linux-azure-fde-6.2 No fix yet
- linux-azure-fde-6.8 No fix yet
- linux-gcp No fix yet
- linux-gcp-5.19 No fix yet
- linux-gcp-6.2 No fix yet
- linux-gcp-6.5 No fix yet
- linux-gcp-6.8 No fix yet
- linux-gke No fix yet
- linux-gkeop No fix yet
- linux-hwe-5.19 No fix yet
- linux-hwe-6.2 No fix yet
- linux-hwe-6.5 No fix yet
- linux-hwe-6.8 No fix yet
- linux-ibm No fix yet
- linux-ibm-6.8 No fix yet
- linux-intel-iot-realtime No fix yet
- linux-intel-iotg No fix yet
- linux-kvm No fix yet
- linux-lowlatency No fix yet
- linux-lowlatency-hwe-5.19 No fix yet
- linux-lowlatency-hwe-6.2 No fix yet
- linux-lowlatency-hwe-6.5 No fix yet
- linux-lowlatency-hwe-6.8 No fix yet
- linux-nvidia No fix yet
- linux-nvidia-6.2 No fix yet
- linux-nvidia-6.5 No fix yet
20 further packages in Ubuntu 22.04 LTS not shown (first 40 listed).
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- linux No fix yet
- linux-aws No fix yet
- linux-aws-6.14 No fix yet
- linux-aws-6.17 No fix yet
- linux-aws-7.0 No fix yet
- linux-azure No fix yet
- linux-azure-6.11 No fix yet
- linux-azure-6.14 No fix yet
- linux-azure-6.17 No fix yet
- linux-azure-7.0 No fix yet
- linux-azure-fde No fix yet
- linux-azure-fde-6.14 No fix yet
- linux-azure-fde-6.17 No fix yet
- linux-azure-fde-7.0 No fix yet
- linux-azure-nvidia No fix yet
- linux-azure-nvidia-6.14 No fix yet
- linux-gcp No fix yet
- linux-gcp-6.11 No fix yet
- linux-gcp-6.14 No fix yet
- linux-gcp-6.17 No fix yet
- linux-gcp-7.0 No fix yet
- linux-gke No fix yet
- linux-gkeop No fix yet
- linux-hwe-6.11 No fix yet
- linux-hwe-6.14 No fix yet
- linux-hwe-6.17 No fix yet
- linux-hwe-7.0 No fix yet
- linux-ibm No fix yet
- linux-lowlatency No fix yet
- linux-lowlatency-hwe-6.11 No fix yet
- linux-nvidia No fix yet
- linux-nvidia-6.11 No fix yet
- linux-nvidia-6.17 No fix yet
- linux-nvidia-7.0 No fix yet
- linux-nvidia-lowlatency No fix yet
- linux-nvidia-tegra Fixed in 6.8.0-1036.39
- linux-oem-6.11 No fix yet
- linux-oem-6.14 No fix yet
- linux-oem-6.17 No fix yet
- linux-oem-6.8 No fix yet
12 further packages in Ubuntu 24.04 LTS not shown (first 40 listed).
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- linux No fix yet
- linux-aws No fix yet
- linux-azure No fix yet
- linux-azure-fde No fix yet
- linux-gcp No fix yet
- linux-gke No fix yet
- linux-ibm No fix yet
- linux-nvidia No fix yet
- linux-nvidia-bos No fix yet
- linux-oem-7.0 No fix yet
- linux-oracle No fix yet
- linux-raspi No fix yet
- linux-realtime No fix yet
- linux-riscv No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Nvidia-BlueField 22.04 LTS
- linux-bluefield No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Nvidia-BlueField 24.04 LTS
- linux-bluefield No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- linux-aws-5.15 No fix yet
- linux-azure-5.15 No fix yet
- linux-azure-fde-5.15 No fix yet
- linux-gcp-5.15 No fix yet
- linux-hwe-5.15 No fix yet
- linux-ibm-5.15 No fix yet
- linux-intel-iotg-5.15 No fix yet
- linux-lowlatency-hwe-5.15 No fix yet
- linux-nvidia-tegra-5.15 No fix yet
- linux-oracle-5.15 No fix yet
- linux-riscv-5.15 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-preview 22.04 LTS
- linux-aws-fips No fix yet
- linux-azure-fips No fix yet
- linux-fips No fix yet
- linux-gcp-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-updates 22.04 LTS
- linux-aws-fips No fix yet
- linux-azure-fips No fix yet
- linux-fips No fix yet
- linux-gcp-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-updates 24.04 LTS
- linux-aws-fips No fix yet
- linux-azure-fips No fix yet
- linux-fips No fix yet
- linux-gcp-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro Realtime 22.04 LTS
- linux-intel-iot-realtime No fix yet
- linux-realtime No fix yet
- linux-realtime-6.8 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro Realtime 24.04 LTS
- linux-raspi-realtime No fix yet
- linux-realtime No fix yet
- linux-realtime-6.14 No fix yet
- linux-realtime-6.17 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.