CVE-2026-53383
ksmbd: reject non-VALID session in compound request branch
02 Description
ksmbd: reject non-VALID session in compound request branch
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.66% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 51.1% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (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:N/I:N/A:H
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-08-17.
- Red Hat severity
- Moderate. 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
- 2026-07-19 11:59Z3 MO AGO
- Last updated
- 2026-08-17 04:50Z2 MO AGO
- Reserved
- 2026-06-09
- Assigning CNA
- Linux
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-476NULL Pointer DereferenceBase
- Data version
- 5.2
- Document digest
- b0619914d47eabcb557f39fcfca97f5ebcc6dbf0e202c56a7466b1998f97176a
05 Affected products
06 References
- git.kernel.orghttps://git.kernel.org/stable/c/25ff12b82a376ff5c4583102a63d2456a6b9ebb9
- git.kernel.orghttps://git.kernel.org/stable/c/fc578523a72cb8b329d32070b95898e81613cc3f
- git.kernel.orghttps://git.kernel.org/stable/c/d2bbbb6c55812220fee5d801c275cc267ea3cbeb
- git.kernel.orghttps://git.kernel.org/stable/c/8f0302fb691537d33ec8f668565257ea9d340ffe
- git.kernel.orghttps://git.kernel.org/stable/c/7cad3ceaf679c55bc9946685dacafce78ce6b51a
- git.kernel.orghttps://git.kernel.org/stable/c/06e1f05a1dbe8bbd054c0927b17fc0a61cc8bef7
- git.kernel.orghttps://git.kernel.org/stable/c/5f983b864d3d473ac533b2f4f44a1bbe5dcbccf4
- git.kernel.orghttps://git.kernel.org/stable/c/609ca17d869d04ba249e32cdcbf13c0b1c66f43c
07 Fixed in
Debian 12
- linux Fixed in 6.1.177-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 6.12.95-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 7.0.14-1
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 Fixed in 5.15.0-198.208
- linux-allwinner-5.19 No fix yet
- linux-aws Fixed in 5.15.0-1117.124
- 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 Fixed in 5.15.0-1123.132
- 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 Fixed in 5.15.0-1122.131
- 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 Fixed in 5.15.0-1118.128
- 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 Fixed in 5.15.0-1113.119
- linux-gkeop Fixed in 5.15.0-1100.108
- 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 Fixed in 5.15.0-1111.115
- linux-ibm-6.8 No fix yet
- linux-intel-iot-realtime No fix yet
- linux-intel-iotg Fixed in 5.15.0-1112.118
- linux-kvm Fixed in 5.15.0-1109.114
- linux-lowlatency Fixed in 5.15.0-195.205
- 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 Fixed in 5.15.0-1112.113
- 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 Fixed in 6.8.0-147.147
- linux-aws Fixed in 6.8.0-1067.70
- linux-aws-6.14 No fix yet
- linux-aws-6.17 No fix yet
- linux-aws-7.0 Fixed in 7.0.0-1012.12~24.04.1
- linux-azure Fixed in 6.8.0-1071.79
- 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 Fixed in 7.0.0-1014.14~24.04.1
- linux-azure-fde Fixed in 6.8.0-1069.76
- linux-azure-fde-6.14 No fix yet
- linux-azure-fde-6.17 No fix yet
- linux-azure-fde-7.0 Fixed in 7.0.0-1013.13~24.04.1
- linux-azure-nvidia No fix yet
- linux-azure-nvidia-6.14 No fix yet
- linux-gcp Fixed in 6.8.0-1071.79
- 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 Fixed in 7.0.0-1011.11~24.04.1
- linux-gke Fixed in 6.8.0-1066.74
- linux-gkeop Fixed in 6.8.0-1052.56
- 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 Fixed in 7.0.0-31.31~24.04.1
- linux-ibm Fixed in 6.8.0-1067.68
- linux-lowlatency Fixed in 6.8.0-147.147.1
- 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 Fixed in 7.0.0-1018.18~24.04.1
- 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 Fixed in 7.0.0-31.31
- linux-aws Fixed in 7.0.0-1012.12
- linux-azure Fixed in 7.0.0-1014.14
- linux-azure-fde Fixed in 7.0.0-1013.13
- linux-gcp Fixed in 7.0.0-1011.11
- linux-gke Fixed in 7.0.0-1006.7
- linux-ibm Fixed in 7.0.0-1013.13
- linux-nvidia Fixed in 7.0.0-1018.18
- linux-nvidia-bos Fixed in 7.0.0-2018.18
- linux-oem-7.0 Fixed in 7.0.0-1013.13
- linux-oracle Fixed in 7.0.0-1011.11
- linux-raspi Fixed in 7.0.0-1019.19
- linux-realtime Fixed in 7.0.0-31.31.1
- linux-riscv Fixed in 7.0.0-31.31.1
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 Fixed in 5.15.0-1101.103
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 Fixed in 6.8.0-1033.38
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 Fixed in 5.15.0-1117.124~20.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-azure-5.15 Fixed in 5.15.0-1123.132~20.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-azure-fde-5.15 Fixed in 5.15.0-1122.131~20.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-gcp-5.15 Fixed in 5.15.0-1118.128~20.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-hwe-5.15 Fixed in 5.15.0-198.208~20.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-ibm-5.15 Fixed in 5.15.0-1111.115~20.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-intel-iotg-5.15 Fixed in 5.15.0-1112.118~20.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-lowlatency-hwe-5.15 Fixed in 5.15.0-195.205~20.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-nvidia-tegra-5.15 No fix yet
- linux-oracle-5.15 Fixed in 5.15.0-1114.120~20.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-riscv-5.15 Fixed in 5.15.0-1111.115~20.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
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-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 Fixed in 5.15.0-1117.124+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 5.15.0-1123.132+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 5.15.0-198.208+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-gcp-fips Fixed in 5.15.0-1118.128+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
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 Fixed in 6.8.0-1067.70+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 6.8.0-1071.79+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 6.8.0-147.147+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-gcp-fips Fixed in 6.8.0-1071.79+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
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 Fixed in 5.15.0-1109.111Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-realtime Fixed in 5.15.0-1116.125Available with Ubuntu Pro: https://ubuntu.com/pro
- 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 Fixed in 6.8.1-1062.63Available with Ubuntu Pro: https://ubuntu.com/pro
- 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.