CriticalFix available
edk2, edk2-hwe and 3 more products — security advisory
Issue summary: ChaCha20-Poly1305 and AES-OCB decryption with an empty ciphertext can report success without verifying the supplied authentication tag when the operation is finalized by calling the EVP_Cipher() function. Impact summary: Applications calling EVP_Cipher() on an empty ciphertext and expecting the call to check the AEAD tag may accept forged messages. CWE: CWE-354 (Improper Validation of Integrity Check Value) Description: The EVP_Cipher() API call for AEAD ciphers behaves like a one shot encryption and decryption call. It also verifies the AEAD tag after the decryption operation. However for AES-OCB and ChaCha20-Poly1305 ciphers it skipped the AEAD tag verification when an empty ciphertext was passed to the function. The callers of this function might believe that a successful return indicates a valid AEAD tag for these ciphers, even when that has not truly been validated in this case. FIPS impact: no The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this CVE as the affected algorithms are not FIPS approved and thus not implemented in the FIPS module.
- Products
- edk2, edk2-hwe, nodejs, openssl, openssl-fips
- Affected versions
- 0.10.25~dfsg2-2ubuntu1, 1.1.1l-1ubuntu1, 2023.05-2, 2023.11-2, 2023.11-3, 2023.11-4, 2023.11-5, 2023.11-6, 2023.11-8, 2024.02-1, 2024.02-2, 2024.02-2ubuntu0.1, 2024.02-2ubuntu0.3, 2024.02-2ubuntu0.4, 2024.02-2ubuntu0.5, 2024.02-2ubuntu0.6, 2024.02-2ubuntu0.7, 2024.02-2ubuntu0.8, 2024.02-2ubuntu0.9, 2025.02-8ubuntu3, 2025.11-3ubuntu6, 2025.11-3ubuntu7, 2025.11-3ubuntu7.2, 2025.11-3ubuntu8, 2025.11-3ubuntu8.2, 2025.11-3ubuntu9, 2026.05-2ubuntu1, 2026.05-2ubuntu2, 2026.05-2ubuntu3, 3.0.0-1ubuntu1, 3.0.1-0ubuntu1, 3.0.10-1ubuntu2, 3.0.10-1ubuntu2.1, 3.0.10-1ubuntu3, 3.0.10-1ubuntu4, 3.0.13-0ubuntu2, 3.0.13-0ubuntu3, 3.0.13-0ubuntu3+Fips1, 3.0.13-0ubuntu3.1, 3.0.13-0ubuntu3.11, 3.0.13-0ubuntu3.12, 3.0.13-0ubuntu3.12+Fips1, 3.0.13-0ubuntu3.2, 3.0.13-0ubuntu3.3, 3.0.13-0ubuntu3.4, 3.0.13-0ubuntu3.5, 3.0.13-0ubuntu3.6, 3.0.13-0ubuntu3.6+Fips1, 3.0.13-0ubuntu3.7, 3.0.13-0ubuntu3.9, 3.0.2-0ubuntu1, 3.0.2-0ubuntu1.1, 3.0.2-0ubuntu1.10, 3.0.2-0ubuntu1.10+Fips1, 3.0.2-0ubuntu1.12, 3.0.2-0ubuntu1.12+Fips1, 3.0.2-0ubuntu1.13, 3.0.2-0ubuntu1.14, 3.0.2-0ubuntu1.14+Fips1, 3.0.2-0ubuntu1.15, 3.0.2-0ubuntu1.15+Fips1, 3.0.2-0ubuntu1.16, 3.0.2-0ubuntu1.16+Fips1, 3.0.2-0ubuntu1.17, 3.0.2-0ubuntu1.17+Fips1, 3.0.2-0ubuntu1.18, 3.0.2-0ubuntu1.18+Fips1, 3.0.2-0ubuntu1.19, 3.0.2-0ubuntu1.19+Fips1, 3.0.2-0ubuntu1.2, 3.0.2-0ubuntu1.20, 3.0.2-0ubuntu1.20+Fips1, 3.0.2-0ubuntu1.21, 3.0.2-0ubuntu1.21+Fips1, 3.0.2-0ubuntu1.23, 3.0.2-0ubuntu1.23+Fips1, 3.0.2-0ubuntu1.25, 3.0.2-0ubuntu1.25+Fips1, 3.0.2-0ubuntu1.26, 3.0.2-0ubuntu1.26+Fips1, 3.0.2-0ubuntu1.4, 3.0.2-0ubuntu1.5, 3.0.2-0ubuntu1.6, 3.0.2-0ubuntu1.7, 3.0.2-0ubuntu1.8, 3.0.2-0ubuntu1.9, 3.0.5-0ubuntu0.1+Fips2.1, 3.0.5-0ubuntu0.2+Fips1, 3.5.3-1ubuntu2, 3.5.5-1ubuntu1, 3.5.5-1ubuntu3, 3.5.5-1ubuntu3.2, 3.5.5-1ubuntu3.3, 3.5.5-1ubuntu3.4, 4.2.2~dfsg-1, 4.2.3~dfsg-1, 4.2.4~dfsg-1ubuntu1, 4.2.4~dfsg-2, 4.2.6~dfsg-1ubuntu1, 4.2.6~dfsg-1ubuntu4, 4.2.6~dfsg-1ubuntu4.1, 4.2.6~dfsg-1ubuntu4.2, 4.2.6~dfsg-1ubuntu4.2+esm1, 4.2.6~dfsg-1ubuntu4.2+esm2, 4.2.6~dfsg-1ubuntu4.2+esm3, 6.11.4~dfsg-1ubuntu1, 6.11.4~dfsg-1ubuntu2, 6.12.0~dfsg-1ubuntu1, 6.12.0~dfsg-2ubuntu1, 6.12.0~dfsg-2ubuntu2, 8.10.0~dfsg-2, 8.10.0~dfsg-2ubuntu0.2, 8.10.0~dfsg-2ubuntu0.3, 8.10.0~dfsg-2ubuntu0.4, 8.10.0~dfsg-2ubuntu0.4+esm1, 8.10.0~dfsg-2ubuntu0.4+esm2, 8.10.0~dfsg-2ubuntu0.4+esm3, 8.10.0~dfsg-2ubuntu0.4+esm4, 8.10.0~dfsg-2ubuntu0.4+esm5, 8.10.0~dfsg-2ubuntu0.4+esm6
- Fixed versions
- 2024.02-2ubuntu0.10, 2025.11-3ubuntu7.3, 3.0.13-0ubuntu3.15, 3.0.13-0ubuntu3.15+Fips1, 3.0.2-0ubuntu1.29, 3.0.2-0ubuntu1.29+Fips1, 3.5.5-1ubuntu3.5
- CVEs
- CVE-2026-75803
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:17 UTC · Revision 1
Source evidence
Issue summary: ChaCha20-Poly1305 and AES-OCB decryption with an empty ciphertext can report success without verifying the supplied authentication tag when the operation is finalized by calling the EVP_Cipher() function. Impact summary: Applications calling EVP_Cipher() on an empty ciphertext and expecting the call to check the AEAD tag may accept forged messages. CWE: CWE-354 (Improper Validation of Integrity Check Value) Description: The EVP_Cipher() API call for AEAD ciphers behaves like a one shot encryption and decryption call. It also verifies the AEAD tag after the decryption operation. However for AES-OCB and ChaCha20-Poly1305 ciphers it skipped the AEAD tag verification when an empty ciphertext was passed to the function. The callers of this function might believe that a successful return indicates a valid AEAD tag for these ciphers, even when that has not truly been validated in this case. FIPS impact: no The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this CVE as the affected algorithms are not FIPS approved and thus not implemented in the FIPS module.
osv:UBUNTU-CVE-2026-75803
nodejs
Fixed versions: Not specified
nodejs
Fixed versions: Not specified
openssl
Fixed versions: 3.0.2-0ubuntu1.29
openssl
Fixed versions: Not specified
openssl-fips
Fixed versions: Not specified
openssl
Fixed versions: 3.0.2-0ubuntu1.29+Fips1
openssl-fips
Fixed versions: Not specified
edk2
Fixed versions: 2024.02-2ubuntu0.10
openssl
Fixed versions: 3.0.13-0ubuntu3.15
openssl-fips
Fixed versions: 3.0.13-0ubuntu3.15+Fips1
edk2
Fixed versions: Not specified
edk2-hwe
Fixed versions: Not specified
edk2
Fixed versions: 2025.11-3ubuntu7.3
edk2-hwe
Fixed versions: Not specified
openssl
Fixed versions: 3.5.5-1ubuntu3.5
Complete source record
{
"id": "34355814e764957b6009425068d81c2d45ac52b74d2d735aec89270b88e81c09",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-75803",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-75803",
"summary": "Issue summary: ChaCha20-Poly1305 and AES-OCB decryption with an empty ciphertext can report success without verifying the supplied authentication tag when the operation is finalized by calling the EVP_Cipher() function. Impact summary: Applications calling EVP_Cipher() on an empty ciphertext and expecting the call to check the AEAD tag may accept forged messages. CWE: CWE-354 (Improper Validation of Integrity Check Value) Description: The EVP_Cipher() API call for AEAD ciphers behaves like a one shot encryption and decryption call. It also verifies the AEAD tag after the decryption operation. However for AES-OCB and ChaCha20-Poly1305 ciphers it skipped the AEAD tag verification when an empty ciphertext was passed to the function. The callers of this function might believe that a successful return indicates a valid AEAD tag for these ciphers, even when that has not truly been validated in this case. FIPS impact: no The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this CVE as the affected algorithms are not FIPS approved and thus not implemented in the FIPS module.",
"evidence": "osv:UBUNTU-CVE-2026-75803",
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
"value": "3.0.2-0ubuntu1.12+Fips1",
"evidence": "/affected/5/versions"
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{
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"evidence": "/affected/5/versions"
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{
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{
"value": "3.0.2-0ubuntu1.16+Fips1",
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{
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{
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{
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{
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{
"value": "3.0.2-0ubuntu1.21+Fips1",
"evidence": "/affected/5/versions"
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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],
"affected_versions": [
{
"value": "3.0.10-1ubuntu2",
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{
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},
{
"value": "3.0.10-1ubuntu3",
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},
{
"value": "3.0.10-1ubuntu4",
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},
{
"value": "3.0.13-0ubuntu2",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.1",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.2",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.3",
"evidence": "/affected/8/versions"
},
{
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"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.5",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.6",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.7",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.9",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.11",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.12",
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}
]
},
{
"name": {
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"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.0.13-0ubuntu3.15+Fips1",
"evidence": "/affected/9/ranges"
}
],
"affected_versions": [
{
"value": "3.0.13-0ubuntu3+Fips1",
"evidence": "/affected/9/versions"
},
{
"value": "3.0.13-0ubuntu3.6+Fips1",
"evidence": "/affected/9/versions"
},
{
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"evidence": "/affected/9/versions"
}
]
},
{
"name": {
"value": "edk2",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2025.11-3ubuntu7",
"evidence": "/affected/10/versions"
},
{
"value": "2025.11-3ubuntu8",
"evidence": "/affected/10/versions"
},
{
"value": "2026.05-2ubuntu1",
"evidence": "/affected/10/versions"
},
{
"value": "2026.05-2ubuntu2",
"evidence": "/affected/10/versions"
},
{
"value": "2026.05-2ubuntu3",
"evidence": "/affected/10/versions"
}
]
},
{
"name": {
"value": "edk2-hwe",
"evidence": "/affected/11/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2025.11-3ubuntu8",
"evidence": "/affected/11/versions"
},
{
"value": "2025.11-3ubuntu9",
"evidence": "/affected/11/versions"
},
{
"value": "2026.05-2ubuntu1",
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"modified": "2026-10-17T13:01:05.685034416Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2026-75803",
"https://www.cve.org/CVERecord?id=CVE-2026-75803",
"https://openssl-library.org/news/secadv/20260825.txt",
"https://ubuntu.com/security/notices/USN-8678-1",
"https://ubuntu.com/security/notices/USN-8678-3",
"https://ubuntu.com/security/notices/USN-8865-1"
]
},
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{
"value": "CVE-2026-75803",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 360956,
"published_at": "2026-08-25T00:00:00+00:00"
}