CVE-2023-6865
MEDIUM
6.5
CVSS Score
Published: December 19, 2023 at 01:38 PM UTC
Updated: June 17, 2026 at 06:51 AM UTC
3 products affected across 2 vendorsDebian LinuxFirefoxFirefox ESR
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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.9%
Description
`EncryptingOutputStream` was susceptible to exposing uninitialized data. This issue could only be abused in order to write data to a local disk which may have implications for private browsing mode. This vulnerability affects Firefox ESR < 115.6 and Firefox < 121.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Debian Linux· Debiandrupal
95%v < 121
Affected range stops below 121, so it looks safe — our inference, not a vendor statement
Affected range stops below 121.0, so it looks safe — our inference, not a vendor statement
v < 115.6
Affected range stops below 115.6, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (6)
Issue TrackingPermissions Required
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1864123Mailing ListThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2023/12/msg00020.htmlCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfo
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