CVE-2026-84267
Last modified
CVE-2026-84267 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. A flaw was found in the SFTP backend in gvfs. When mounting a share, a malicious SFTP server can cause read_string() to allocate a buffer with a certain length but the function does not verify that the buffer is completely filled, leaving the remainder of the buffer containing uninitialized heap contents.
Description
A flaw was found in the SFTP backend in gvfs. When mounting a share, a malicious SFTP server can cause read_string() to allocate a buffer with a certain length but the function does not verify that the buffer is completely filled, leaving the remainder of the buffer containing uninitialized heap contents. If the server sends a short FXP_HANDLE reply, these uninitialized bytes are taken as the file handle. The client will then echo these uninitialized bytes back to the server on all subsequent requests using that handle. With a length of 128 bytes, this issue allows the malicious server to deterministically read uninitialized heap memory from the gvfsd-sftp process, leaking its heap base and the load address of the libgio library, resulting in a deterministic defeat of Address Space Layout Randomization (ASLR).
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | All versions |
| Red Hat | Red Hat Enterprise Linux 6 | All versions |
| Red Hat | Red Hat Enterprise Linux 7 | All versions |
| Red Hat | Red Hat Enterprise Linux 8 | All versions |
| Red Hat | Red Hat Enterprise Linux 9 | All versions |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-84267?
How severe is CVE-2026-84267?
How do I fix CVE-2026-84267?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-84232A flaw was found in pulpcore's content serving application. …5.4
- CVE-2026-84233A flaw was found in rpm. A local attacker could supply a spe…7
- CVE-2026-84235A denial-of-service security issue exists in the affected pr…8.7
- CVE-2026-8424The Remove Yellow BGBOX plugin for WordPress is vulnerable t…4.3
- CVE-2026-8425The Notify Odoo plugin for WordPress is vulnerable to Cross-…4.3
- CVE-2026-8426Concrete CMS 9.5.0 and below does not validate a CSRF token …8.8
- CVE-2026-84268A flaw was found in the SFTP backend in gvfs. When mounting …8.8
- CVE-2026-84269A flaw was found in the AFP backend in gvfs. When mounting a…6.5
- CVE-2026-8427Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Requ…8.8
- CVE-2026-84270A flaw was found in the MTP backend in gvfs. When reading a …4.3
- CVE-2026-8428Concrete CMS 9.5.0 and below emits a CSRF token in the local…8.8
- CVE-2026-8429SPIP versions prior to 4.4.14 contain a remote code executio…8.8
Are you affected by CVE-2026-84267?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST