Four-byte heap over-read via incomplete bounds check
Published Jul 28, 2026 · Updated Jul 28, 2026
Out-of-bounds read in GStreamer on Red Hat Enterprise Linux 6 through 10 allows attackers to read four adjacent heap bytes via crafted media. gst_matroska_parse_flac_stream_headers checks off plus len against the buffer size but then copies len plus four bytes, omitting the FLAC header. A user must open a crafted Matroska or WebM file; Red Hat reports no direct remote observability, memory corruption, or likely production crash.
Summary
What happened
Out-of-bounds read in GStreamer on Red Hat Enterprise Linux 6 through 10 allows attackers to read four adjacent heap bytes via crafted media. gst_matroska_parse_flac_stream_headers checks off plus len against the buffer size but then copies len plus four bytes, omitting the FLAC header. A user must open a crafted Matroska or WebM file; Red Hat reports no direct remote observability, memory corruption, or likely production crash.
The record
- CVE
- CVE-2026-17072
- Published
- Jul 28, 2026
- Updated
- Jul 28, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Enterprise Linux 6
- Classifications
- CWE-125, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 28, 2026CVE publishedPublication date reported by the CVE source.
- Jul 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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