DEBIAN-CVE-2026-75806

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Source
https://security-tracker.debian.org/tracker/CVE-2026-75806
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-75806.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-75806
Upstream
Published
2026-09-29T16:17:11Z
Modified
2026-09-30T08:00:11Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
[none]
Details

Issue summary: An established DTLS 1.2 association using an AEAD cipher suite can be terminated by a single unauthenticated datagram whose encrypted fragment is shorter than the mandatory explicit IV and authentication tag overhead. Impact summary: An attacker who can send a datagram that is routed to an existing DTLS 1.2 association can tear that association down without knowing any key material. This is a Denial of Service limited to the targeted association. There is no memory safety or confidentiality impact. CWE: CWE-1284: Improper Validation of Specified Quantity in Input Description: In TLS 1.2 and DTLS 1.2 every record protected by an AEAD cipher suite carries an explicit IV followed by the ciphertext and an authentication tag. When decrypting such a record the record layer passed the record length to the cipher implementation before checking that the record was long enough to contain the explicit IV and the tag. For a record shorter than that overhead the cipher implementation rejected the impossible length, and the record layer treated this as an internal failure and raised a fatal internal_error alert instead of treating the record as one that failed authentication. In TLS 1.2 the same record causes a fatal internal_error alert instead of the expected bad_record_mac alert. Since any undecryptable record already terminates a TLS connection, this is a protocol conformance issue rather than a security issue in TLS. The fix validates the record length against the explicit IV and tag length before any AEAD processing, so that TLS reports bad_record_mac and DTLS silently discards the record. FIPS impact: no The affected code is outside the FIPS module boundary.

References

Affected packages

Debian:12 / openssl

Package

Name
openssl
Purl
pkg:deb/debian/openssl?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.0.9-1
3.0.10-1~deb12u1
3.0.10-1
3.0.11-1~deb12u1
3.0.11-1~deb12u2
3.0.11-1
3.0.12-1
3.0.12-2
3.0.13-1~deb12u1
3.0.13-1~deb12u2
3.0.14-1~deb12u1
3.0.14-1~deb12u2
3.0.15-1~deb12u1
3.0.16-1~deb12u1
3.0.17-1~deb12u1
3.0.17-1~deb12u2
3.0.17-1~deb12u3
3.0.18-1~deb12u1
3.0.18-1~deb12u2
3.0.19-1~deb12u1
3.0.19-1~deb12u2
3.0.20-1~deb12u1
3.0.20-1~deb12u2
3.0.22-1~deb12u1
3.1.0-1
3.1.1-1
3.1.2-1
3.1.3-1
3.1.4-1
3.1.4-2
3.1.5-1
3.1.5-1.1
3.1.5-1.1+hurd.1
3.2.0-1
3.2.0-2
3.2.1-1
3.2.1-1.1~exp1
3.2.1-2
3.2.1-3
3.2.2-1
3.3.0~beta1-1
3.3.0-1
3.3.1-1
3.3.1-2
3.3.1-5
3.3.1-6
3.3.1-7
3.3.2-1
3.3.2-2
3.4.0~~beta1-1
3.4.0~~beta1-2
3.4.0-1
3.4.0-2
3.4.1-1
3.5.0~~alpha1-1
3.5.0~~beta1-1
3.5.0-1
3.5.0-2
3.5.0-3
3.5.1-1
3.5.2-1
3.5.3-1
3.5.4-1~deb13u1
3.5.4-1~deb13u2
3.5.4-1
3.5.5-1~deb13u1
3.5.5-1~deb13u2
3.5.5-1
3.5.6-1~deb13u1
3.5.6-1~deb13u2
3.5.7-1~deb13u1
3.5.7-1~deb13u2
3.5.7-1~deb13u3
3.6.0~~alpha1-1
3.6.0~~beta1-1
3.6.0-1
3.6.0-2
3.6.1-1
3.6.1-2
3.6.1-3
3.6.2-1
3.6.3-1
3.6.4-1
3.6.5-1
4.*
4.0.0~alpha1-1
4.0.0~beta1-1
4.0.0-1
4.0.1-1
4.0.2-1
4.0.3-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-75806.json"

Debian:13 / openssl

Package

Name
openssl
Purl
pkg:deb/debian/openssl?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.5.7-1~deb13u3

Affected versions

3.*
3.5.1-1
3.5.1-1+deb13u1
3.5.2-1
3.5.3-1
3.5.4-1~deb13u1
3.5.4-1~deb13u2
3.5.4-1
3.5.5-1~deb13u1
3.5.5-1~deb13u2
3.5.5-1
3.5.6-1~deb13u1
3.5.6-1~deb13u2
3.5.7-1~deb13u1
3.5.7-1~deb13u2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-75806.json"

Debian:14 / openssl

Package

Name
openssl
Purl
pkg:deb/debian/openssl?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.5.1-1
3.5.2-1
3.5.3-1
3.5.4-1~deb13u1
3.5.4-1~deb13u2
3.5.4-1
3.5.5-1~deb13u1
3.5.5-1~deb13u2
3.5.5-1
3.5.6-1~deb13u1
3.5.6-1~deb13u2
3.5.7-1~deb13u1
3.5.7-1~deb13u2
3.5.7-1~deb13u3
3.6.0~~alpha1-1
3.6.0~~beta1-1
3.6.0-1
3.6.0-2
3.6.1-1
3.6.1-2
3.6.1-3
3.6.2-1
3.6.3-1
3.6.4-1
3.6.5-1
4.*
4.0.0~alpha1-1
4.0.0~beta1-1
4.0.0-1
4.0.1-1
4.0.2-1
4.0.3-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-75806.json"