CVE-2026-68342

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68342", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.384Z", "datePublished": "2026-08-10T12:03:18.852Z", "dateUpdated": "2026-08-17T05:03:42.312Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:03:42.312Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\novpn: avoid putting unrelated P2P peer on socket release\n\novpn_peer_release_p2p() is called when an OVPN UDP socket is being\ndestroyed. It checks the currently published P2P peer and releases it only\nif that peer still uses the socket being destroyed.\n\nA peer replacement can publish a new peer before the old UDP socket is\ndestroyed. When the old socket destruction path runs afterwards,\novpn_peer_release_p2p() observes the new peer through ovpn->peer. Since the\nnew peer uses a different socket, the function takes the socket mismatch\nbranch.\n\nThat branch still calls ovpn_peer_put(peer). At this point, however, peer\nis the currently published replacement peer, not the peer associated with\nthe socket being destroyed. Dropping its reference can free it while\novpn->peer still points to it, leading to later use-after-free accesses\nfrom the peer and socket cleanup paths.\n\nKASAN reports this as a slab-use-after-free on the kmalloc-1k ovpn_peer\nobject. In the reproducer, the object is allocated from ovpn_peer_new() via\novpn_nl_peer_new_doit(), and freed through ovpn_peer_release_rcu() from RCU\ncallback processing. Observed access sites include ovpn_peer_remove(),\novpn_socket_release(), ovpn_nl_peer_del_notify(), and unlock_ovpn().\n\nFix this by returning from the socket mismatch branch without putting the\npeer."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ovpn/peer.c"], "versions": [{"version": "f6226ae7a0cd47aaa9175aca6a1e19600f884cbf", "lessThan": "c5bf6b39be235ef578af4d39872f0c68cda3b937", "status": "affected", "versionType": "git"}, {"version": "f6226ae7a0cd47aaa9175aca6a1e19600f884cbf", "lessThan": "016a50379d17b886d12a4efa5211a418e035fe70", "status": "affected", "versionType": "git"}, {"version": "f6226ae7a0cd47aaa9175aca6a1e19600f884cbf", "lessThan": "b52c5103f64ee825996ca1ab8df7283cde8c5f86", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ovpn/peer.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c5bf6b39be235ef578af4d39872f0c68cda3b937"}, {"url": "https://git.kernel.org/stable/c/016a50379d17b886d12a4efa5211a418e035fe70"}, {"url": "https://git.kernel.org/stable/c/b52c5103f64ee825996ca1ab8df7283cde8c5f86"}], "title": "ovpn: avoid putting unrelated P2P peer on socket release", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ovpn/peer.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c5bf6b39be235ef578af4d39872f0c68cda3b937", "status": "affected", "version": "f6226ae7a0cd47aaa9175aca6a1e19600f884cbf", "versionType": "git"}, {"lessThan": "016a50379d17b886d12a4efa5211a418e035fe70", "status": "affected", "version": "f6226ae7a0cd47aaa9175aca6a1e19600f884cbf", "versionType": "git"}, {"lessThan": "b52c5103f64ee825996ca1ab8df7283cde8c5f86", "status": "affected", "version": "f6226ae7a0cd47aaa9175aca6a1e19600f884cbf", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ovpn/peer.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"lessThan": "6.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.42", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\novpn: avoid putting unrelated P2P peer on socket release\n\novpn_peer_release_p2p() is called when an OVPN UDP socket is being\ndestroyed. It checks the currently published P2P peer and releases it only\nif that peer still uses the socket being destroyed.\n\nA peer replacement can publish a new peer before the old UDP socket is\ndestroyed. When the old socket destruction path runs afterwards,\novpn_peer_release_p2p() observes the new peer through ovpn->peer. Since the\nnew peer uses a different socket, the function takes the socket mismatch\nbranch.\n\nThat branch still calls ovpn_peer_put(peer). At this point, however, peer\nis the currently published replacement peer, not the peer associated with\nthe socket being destroyed. Dropping its reference can free it while\novpn->peer still points to it, leading to later use-after-free accesses\nfrom the peer and socket cleanup paths.\n\nKASAN reports this as a slab-use-after-free on the kmalloc-1k ovpn_peer\nobject. In the reproducer, the object is allocated from ovpn_peer_new() via\novpn_nl_peer_new_doit(), and freed through ovpn_peer_release_rcu() from RCU\ncallback processing. Observed access sites include ovpn_peer_remove(),\novpn_socket_release(), ovpn_nl_peer_del_notify(), and unlock_ovpn().\n\nFix this by returning from the socket mismatch branch without putting the\npeer."}], "id": "CVE-2026-68342", "lastModified": "2026-08-17T06:17:42.420", "metrics": {}, "published": "2026-08-10T13:20:24.720", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/016a50379d17b886d12a4efa5211a418e035fe70"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b52c5103f64ee825996ca1ab8df7283cde8c5f86"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c5bf6b39be235ef578af4d39872f0c68cda3b937"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: OpenVPN use-after-free vulnerability leading to denial of service or arbitrary code execution.", "id": "2513235", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513235"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\novpn: avoid putting unrelated P2P peer on socket release\novpn_peer_release_p2p() is called when an OVPN UDP socket is being\ndestroyed. It checks the currently published P2P peer and releases it only\nif that peer still uses the socket being destroyed.\nA peer replacement can publish a new peer before the old UDP socket is\ndestroyed. When the old socket destruction path runs afterwards,\novpn_peer_release_p2p() observes the new peer through ovpn->peer. Since the\nnew peer uses a different socket, the function takes the socket mismatch\nbranch.\nThat branch still calls ovpn_peer_put(peer). At this point, however, peer\nis the currently published replacement peer, not the peer associated with\nthe socket being destroyed. Dropping its reference can free it while\novpn->peer still points to it, leading to later use-after-free accesses\nfrom the peer and socket cleanup paths.\nKASAN reports this as a slab-use-after-free on the kmalloc-1k ovpn_peer\nobject. In the reproducer, the object is allocated from ovpn_peer_new() via\novpn_nl_peer_new_doit(), and freed through ovpn_peer_release_rcu() from RCU\ncallback processing. Observed access sites include ovpn_peer_remove(),\novpn_socket_release(), ovpn_nl_peer_del_notify(), and unlock_ovpn().\nFix this by returning from the socket mismatch branch without putting the\npeer.", "A flaw was found in the Linux kernel's OpenVPN (ovpn) module. During the destruction of an ovpn UDP socket, a race condition can occur where a new peer is published before the old socket is fully released. This can lead to a use-after-free vulnerability, allowing an attacker to potentially cause a denial of service or execute arbitrary code by manipulating memory that has been deallocated."], "name": "CVE-2026-68342", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:enterprise_linux_nvidia:", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux for NVIDIA 26"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-08-10T12:03:18Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68342\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68342\nhttps://git.kernel.org/stable/c/016a50379d17b886d12a4efa5211a418e035fe70\nhttps://git.kernel.org/stable/c/b52c5103f64ee825996ca1ab8df7283cde8c5f86\nhttps://git.kernel.org/stable/c/c5bf6b39be235ef578af4d39872f0c68cda3b937"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f6226ae7a0cd47aaa9175aca6a1e19600f884cbf,c5bf6b39be235ef578af4d39872f0c68cda3b937)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f6226ae7a0cd47aaa9175aca6a1e19600f884cbf,016a50379d17b886d12a4efa5211a418e035fe70)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f6226ae7a0cd47aaa9175aca6a1e19600f884cbf,b52c5103f64ee825996ca1ab8df7283cde8c5f86)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.42,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc5,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-10T16:00:04.016604+00:00", "updated": "2026-08-13T06:00:04.716255+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}