CVE-2026-80520

In the Linux kernel, the following vulnerability has been resolved: ovpn: fix NULL dereference when killing missing key ovpn_crypto_kill_key assumes both crypto slots are populated and dereferences each slot before checking it. That is not guaranteed: a peer can have only one installed key, and the kill path may be asked to remove a key that is not present. Read each slot once while holding the crypto state lock, check for NULL before looking at key_id, and only replace the slot that actually matches.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/41d44ac7a61e2f74453af40d4fe1b82af9ea0ada
https://git.kernel.org/stable/c/a47a080d06ee9d94dc6a2da0fc2b9beeeedb92b3
https://git.kernel.org/stable/c/acf32a5dff082044cf0fd9492f3c10b7357c15ee

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-26 15:17

Updated : 2026-08-27 06:17

NVD link : CVE-2026-80520

Mitre link : CVE-2026-80520

CVE.ORG link : CVE-2026-80520

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-80520", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "89d3c0e4612afa1c6429ed68d298e35592fbe208", "lessThan": "a47a080d06ee9d94dc6a2da0fc2b9beeeedb92b3", "versionType": "git"}, {"status": "affected", "version": "89d3c0e4612afa1c6429ed68d298e35592fbe208", "lessThan": "acf32a5dff082044cf0fd9492f3c10b7357c15ee", "versionType": "git"}, {"status": "affected", "version": "89d3c0e4612afa1c6429ed68d298e35592fbe208", "lessThan": "41d44ac7a61e2f74453af40d4fe1b82af9ea0ada", "versionType": "git"}], "programFiles": ["drivers/net/ovpn/crypto.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"status": "unaffected", "version": "0", "lessThan": "6.16", "versionType": "semver"}, {"status": "unaffected", "version": "6.18.46", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.10", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/ovpn/crypto.c"], "defaultStatus": "affected"}]}], "published": "2026-08-26T15:17:05.553", "references": [{"url": "https://git.kernel.org/stable/c/41d44ac7a61e2f74453af40d4fe1b82af9ea0ada", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a47a080d06ee9d94dc6a2da0fc2b9beeeedb92b3", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/acf32a5dff082044cf0fd9492f3c10b7357c15ee", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\novpn: fix NULL dereference when killing missing key\n\novpn_crypto_kill_key assumes both crypto slots are populated and\ndereferences each slot before checking it. That is not guaranteed: a\npeer can have only one installed key, and the kill path may be asked to\nremove a key that is not present.\n\nRead each slot once while holding the crypto state lock, check for NULL\nbefore looking at key_id, and only replace the slot that actually\nmatches."}], "lastModified": "2026-08-27T06:17:30.450", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}