CVE-2026-2340: Red Hat Enterprise Linux 10 · Improper Handling of Insufficient Permissions or Privileges
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 6.5 Medium.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.9% chance of exploitation in 30 days – higher than 60% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 27 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10samba | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10.0 Extended Update Supportsamba | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8samba | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8samba | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportsamba | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Onsamba | Affected– | Fixed in– |
AI-suggested
Red Hat has released an official security update that addresses CVE-2026-2340. Users of Red Hat Enterprise Linux 10 should apply the available patches to versions 10.2 or later as detailed in the Red Hat advisory (https://access.redhat.com/articles/11258). No additional mitigations are required beyond applying the official fix.
Description
A flaw was found in Samba’s vfs_worm module. The module is intended to provide write-once, read-many (WORM) protections by preventing modification of files after a configurable grace period. Due to insufficient validation during rename operations, an authenticated user with write access to a share could overwrite a protected file by renaming a newly created file over the existing WORM-protected file.
References
- access.redhat.com/errata/RHSA-2026:22644 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:22963 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:25049 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:25979 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:28053 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:28054 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:28055 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:28056 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:28057 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:29863 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-2340 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2447318 (opens in a new tab)
- bugzilla.samba.org/show_bug.cgi?id=15997 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:57483 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:56786 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:56853 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:56911 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:59831 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60019 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:62549 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:62409 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:65851 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:65907 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:65839 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:67857 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:70586 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:77320 (opens in a new tab)