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01 Record

CVE-2023-2640

On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the

HighPUBLISHEDCNA: canonical

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

02 Description

On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the

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.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

15.19% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 96.5% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

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

2023-07-26 01:59Z3 YR AGO

Last updated

2024-10-23 14:59Z2 YR AGO

Reserved

2023-05-10

Assigning CNA

canonical

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-863Incorrect AuthorizationClass

Data version

5.1

Document digest

27fd6ddd234c1cd549498480e42f5a8981a0c7d640063052db871352dea22fb0

05 Affected products

VendorProductVersionsPlatforms

CanonicalUbuntu KernelNot specifiedLinux

canonicalubantu_kernel0 to < 6.2.0-26.26, 0 to < 6.0.0-1020.20, 0 to < 5.4.0-155.172—

06 References

ubuntu.comhttps://ubuntu.com/security/notices/USN-6250-1vendor-advisory
cve.mitre.orghttps://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640issue-tracking
wiz.iohttps://wiz.io/blog/ubuntu-overlayfs-vulnerabilitytechnical-description
lists.ubuntu.comhttps://lists.ubuntu.com/archives/kernel-team/2023-July/140923.htmlmailing-list

07 Fixed in

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-gcp-5.11
No fix yet
linux-gcp-5.13
No fix yet
linux-gcp-5.8
No fix yet
linux-gke-5.15
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 5.15.0-177.187
linux-aws
Fixed in 5.15.0-1106.113
linux-aws-5.19
Fixed in 5.19.0-1029.30~22.04.1
linux-aws-6.2
Fixed in 6.2.0-1008.8~22.04.1
linux-aws-6.5
No fix yet
linux-azure
Fixed in 5.15.0-1111.120
linux-azure-5.19
No fix yet
linux-azure-6.2
Fixed in 6.2.0-1008.8~22.04.1
linux-azure-6.5
No fix yet
linux-azure-fde
Fixed in 5.15.0-1114.123
linux-gcp
Fixed in 5.15.0-1106.115
linux-gcp-5.19
Fixed in 5.19.0-1030.32~22.04.1
linux-gcp-6.2
Fixed in 6.2.0-1010.10~22.04.1
linux-gcp-6.5
No fix yet
linux-gke
Fixed in 5.15.0-1102.108
linux-gkeop
Fixed in 5.15.0-1089.97
linux-hwe-5.19
Fixed in 5.19.0-50.50
linux-hwe-6.2
Fixed in 6.2.0-26.26~22.04.1
linux-hwe-6.5
No fix yet
linux-ibm
Fixed in 5.15.0-1100.103
linux-intel-iot-realtime
No fix yet
linux-intel-iotg
Fixed in 5.15.0-1101.107
linux-kvm
Fixed in 5.15.0-1098.103
linux-lowlatency
Fixed in 5.15.0-177.187
linux-lowlatency-hwe-5.19
Fixed in 5.19.0-1030.30
linux-lowlatency-hwe-6.2
Fixed in 6.2.0-1009.9~22.04.1
linux-lowlatency-hwe-6.5
No fix yet
linux-nvidia
Fixed in 5.15.0-1101.102
linux-nvidia-6.2
Fixed in 6.2.0-1009.9
linux-nvidia-6.5
No fix yet
linux-nvidia-tegra
Fixed in 5.15.0-1058.58
linux-nvidia-tegra-igx
Fixed in 5.15.0-1047.47
linux-oem-5.17
No fix yet
linux-oem-6.0
Fixed in 6.0.0-1020.20
linux-oem-6.1
Fixed in 6.1.0-1019.19
linux-oem-6.5
No fix yet
linux-oracle
Fixed in 5.15.0-1103.109
linux-oracle-6.5
No fix yet
linux-raspi
Fixed in 5.15.0-1100.103
linux-realtime
No fix yet

5 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-aws-6.14
No fix yet
linux-gcp-6.14
No fix yet
linux-hwe-6.14
No fix yet
linux-oem-6.14
No fix yet
linux-oracle-6.14
No fix yet
linux-raspi-realtime
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
Fixed in 5.15.0-1090.92

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

linux
No fix yet
linux-aws
No fix yet
linux-azure
No fix yet
linux-lts-xenial
No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

linux
No fix yet
linux-aws
No fix yet
linux-aws-hwe
No fix yet
linux-azure
No fix yet
linux-gcp
No fix yet
linux-hwe
No fix yet
linux-kvm
No fix yet
linux-oracle
No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

linux
No fix yet
linux-aws
No fix yet
linux-aws-5.4
No fix yet
linux-azure-4.15
No fix yet
linux-azure-5.4
No fix yet
linux-gcp-4.15
No fix yet
linux-gcp-5.4
No fix yet
linux-hwe-5.4
No fix yet
linux-ibm-5.4
No fix yet
linux-kvm
No fix yet
linux-oracle
No fix yet
linux-oracle-5.4
No fix yet
linux-raspi-5.4
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
No fix yet
linux-aws
No fix yet
linux-aws-5.15
Fixed in 5.15.0-1106.113~20.04.1
Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
linux-azure
No fix yet
linux-azure-5.15
Fixed in 5.15.0-1111.120~20.04.1
Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
linux-bluefield
No fix yet
linux-gcp
No fix yet
linux-gcp-5.15
Fixed in 5.15.0-1106.115~20.04.1
Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
linux-hwe-5.15
Fixed in 5.15.0-177.187~20.04.1
Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
linux-ibm
No fix yet
linux-ibm-5.15
Fixed in 5.15.0-1100.103~20.04.1
Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
linux-intel-iotg-5.15
Fixed in 5.15.0-1101.107~20.04.1
Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
linux-iot
No fix yet
linux-kvm
No fix yet
linux-lowlatency-hwe-5.15
Fixed in 5.15.0-177.187~20.04.1
Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
linux-nvidia-tegra-5.15
Fixed in 5.15.0-1058.58~20.04.1
Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
linux-oracle
No fix yet
linux-oracle-5.15
Fixed in 5.15.0-1104.110~20.04.1
Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
linux-raspi
No fix yet
linux-riscv-5.15
Fixed in 5.15.0-1100.104~20.04.1
Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
linux-xilinx-zynqmp
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 16.04 LTS

linux-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 18.04 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 20.04 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
Fixed in 5.15.0-1106.113+fips1
Available with Ubuntu Pro: https://ubuntu.com/pro
linux-azure-fips
Fixed in 5.15.0-1111.120+fips1
Available with Ubuntu Pro: https://ubuntu.com/pro
linux-fips
Fixed in 5.15.0-177.187+fips1
Available with Ubuntu Pro: https://ubuntu.com/pro
linux-gcp-fips
Fixed in 5.15.0-1106.115+fips1
Available 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 16.04 LTS

linux-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 18.04 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 20.04 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
Fixed in 5.15.0-1098.100
Available with Ubuntu Pro: https://ubuntu.com/pro
linux-realtime
Fixed in 5.15.0-1105.114
Available 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 24.04 LTS

linux-realtime-6.14
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.