CVE-2023-2640

highpriority · attend · 46OT risk · highEPSS 0.152 · 97 %ileexploit · functionalDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

10 exploits · functional

Likely / severe?

15.2% (97th) EPSS

CVSS 7.8 · high

Is it mine?

6 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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 mounted files, leading them to be set on the upper files without the appropriate security checks.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.17.8highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · security@ubuntu.comexploitability 1.8 · impact 5.9

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-863USprimaryCWE-863US

exploits (10)

Public proof-of-concept and weaponised exploit code.

exploit/linux/local/gameoverlay_privescGameOver(lay) Privilege Escalation and Container Escapefunctional · metasploit
K5LK/CVE-2023-2640-32629K5LK/CVE-2023-2640-32629PoC · poc_in_github
Nkipohcs/CVE-2023-2640-CVE-2023-32629Nkipohcs/CVE-2023-2640-CVE-2023-32629PoC · poc_in_github
OllaPapito/gameoverlayCVE-2023-2640 CVE-2023-32629PoC · poc_in_github
SanjayRagavendar/Ubuntu-GameOver-LayEscalating Privilege using CVE-2023-2640 CVE-2023-3262 PoC · poc_in_github
WhatsWrongAndWhy/CVE-2023-2640-CVE-2023-32629WhatsWrongAndWhy/CVE-2023-2640-CVE-2023-32629PoC · poc_in_github

affected products (6)

Products and version ranges known to be affected.

Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Ubuntu Linux Kernelall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:kernel
Canonical Ltd. Ubuntu≤ 23.04fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 1.7fstec_bduRU
Сообщество свободного программного обеспечения Linux5.19 → 6.4fstec_bduRU
canonical ubuntu linux= 23.04nvdUScpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1903Ubuntu Linux: Mehrere SchwachstellenDeutsch2023-07-26csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen im Ubuntu Linux Kernel ausnutzen, um Sicherheitsvorkehrungen zu umgehen und seine Rechte zu erhöhen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd NVD CVE.org MITRE

published 2023-07-26modified 2026-06-17

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+5004 more

references (15)

External citations — patches, advisories, analysis.

scry

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