{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68141", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.370Z", "datePublished": "2026-08-10T11:59:05.051Z", "dateUpdated": "2026-08-13T22:40:29.418Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-13T22:40:29.418Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/af_iucv: fix NULL deref in afiucv_hs_callback_syn()\n\nafiucv_hs_callback_syn() allocates the child socket with GFP_ATOMIC.\nIf the allocation fails, nsk is NULL.\n\nThe connection-refused path is entered when the listen state check\nfails, the accept backlog is full, or nsk is NULL. The code\nunconditionally calls iucv_sock_kill(nsk) in that path.\n\niucv_sock_kill() does not accept a NULL socket pointer and immediately\ndereferences sk via sock_flag(sk, SOCK_ZAPPED). When nsk is NULL,\ncalling iucv_sock_kill(nsk) results in a NULL pointer dereference.\n\nOnly call iucv_sock_kill() when a child socket was successfully\nallocated."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - The flaw is reached from afiucv_hs_rcv() via dev_add_pack() when ETH_P_AF_IUCV SYN frames arrive on a HiperSockets netdev in netif RX softirq; a remote LPAR/guest on the IBM Z HiperSockets fabric can send these connection requests without local access.\nAC:L - An attacker can repeatedly send SYN packets to a listening AF_IUCV service to pressure GFP_ATOMIC socket allocations until iucv_sock_alloc() fails and the broken connection-refused path runs; no timing race or victim-specific state beyond routine memory pressure is required.\nPR:N - Exploitation requires only sending unauthenticated HiperSockets SYN traffic to a bound/listening AF_IUCV socket; the handshake path has no credential checks and the af_iucv code performs no capability or permission validation before reaching afiucv_hs_callback_syn().\nUI:N - Triggering the NULL dereference needs no action from an end user beyond a service already listening on HiperSockets; the attacker can initiate SYN packets remotely without victim interaction.\nS:U - Impact is a kernel NULL pointer dereference and likely oops/panic in the victim LPAR kernel; it does not cross a VM/host, IOMMU, or sandbox boundary to compromise a different security authority.\nC:N - The failure is an immediate NULL pointer dereference in sock_flag() inside iucv_sock_kill(); there is no memory corruption, out-of-bounds access, or use-after-free that could yield information disclosure.\nI:N - The bug does not write attacker-controlled data or corrupt kernel structures; it only dereferences a NULL socket pointer during cleanup, so no integrity impact or code-execution primitive is created.\nA:H - A NULL dereference in afiucv_hs_callback_syn() during softirq packet processing can cause a kernel oops or panic, denying all service on the affected IBM Z LPAR until reboot."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/iucv/af_iucv.c"], "versions": [{"version": "3881ac441f642d56503818123446f7298442236b", "lessThan": "8bb111f87ded6acb9837ec9b45d6f02cda94c51f", "status": "affected", "versionType": "git"}, {"version": "3881ac441f642d56503818123446f7298442236b", "lessThan": "46453b16f38ec7147351f7447e2aec6ea330f7b3", "status": "affected", "versionType": "git"}, {"version": "3881ac441f642d56503818123446f7298442236b", "lessThan": "33736ff5e7c97d3348ce812e8bd2e125d840743c", "status": "affected", "versionType": "git"}, {"version": "3881ac441f642d56503818123446f7298442236b", "lessThan": "0e857185591fe79934427c9c0c1c31dc776be134", "status": "affected", "versionType": "git"}, {"version": "3881ac441f642d56503818123446f7298442236b", "lessThan": "47a5116e56a6b6fe1e909f244e39cd0fc26ceee4", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/iucv/af_iucv.c"], "versions": [{"version": "3.2", "status": "affected"}, {"version": "0", "lessThan": "3.2", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.101", "lessThanOrEqual": "6.12.*", "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-rc5", "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": "3.2", "versionEndExcluding": "6.6.148"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "7.2-rc5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8bb111f87ded6acb9837ec9b45d6f02cda94c51f"}, {"url": "https://git.kernel.org/stable/c/46453b16f38ec7147351f7447e2aec6ea330f7b3"}, {"url": "https://git.kernel.org/stable/c/33736ff5e7c97d3348ce812e8bd2e125d840743c"}, {"url": "https://git.kernel.org/stable/c/0e857185591fe79934427c9c0c1c31dc776be134"}, {"url": "https://git.kernel.org/stable/c/47a5116e56a6b6fe1e909f244e39cd0fc26ceee4"}], "title": "net/af_iucv: fix NULL deref in afiucv_hs_callback_syn()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/iucv/af_iucv.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "8bb111f87ded6acb9837ec9b45d6f02cda94c51f", "status": "affected", "version": "3881ac441f642d56503818123446f7298442236b", "versionType": "git"}, {"lessThan": "46453b16f38ec7147351f7447e2aec6ea330f7b3", "status": "affected", "version": "3881ac441f642d56503818123446f7298442236b", "versionType": "git"}, {"lessThan": "33736ff5e7c97d3348ce812e8bd2e125d840743c", "status": "affected", "version": "3881ac441f642d56503818123446f7298442236b", "versionType": "git"}, {"lessThan": "0e857185591fe79934427c9c0c1c31dc776be134", "status": "affected", "version": "3881ac441f642d56503818123446f7298442236b", "versionType": "git"}, {"lessThan": "47a5116e56a6b6fe1e909f244e39cd0fc26ceee4", "status": "affected", "version": "3881ac441f642d56503818123446f7298442236b", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/iucv/af_iucv.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.2"}, {"lessThan": "3.2", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.148", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.101", "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-rc5", "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\nnet/af_iucv: fix NULL deref in afiucv_hs_callback_syn()\n\nafiucv_hs_callback_syn() allocates the child socket with GFP_ATOMIC.\nIf the allocation fails, nsk is NULL.\n\nThe connection-refused path is entered when the listen state check\nfails, the accept backlog is full, or nsk is NULL. The code\nunconditionally calls iucv_sock_kill(nsk) in that path.\n\niucv_sock_kill() does not accept a NULL socket pointer and immediately\ndereferences sk via sock_flag(sk, SOCK_ZAPPED). When nsk is NULL,\ncalling iucv_sock_kill(nsk) results in a NULL pointer dereference.\n\nOnly call iucv_sock_kill() when a child socket was successfully\nallocated."}], "id": "CVE-2026-68141", "lastModified": "2026-08-13T23:17:19.300", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-10T13:19:59.767", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0e857185591fe79934427c9c0c1c31dc776be134"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/33736ff5e7c97d3348ce812e8bd2e125d840743c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/46453b16f38ec7147351f7447e2aec6ea330f7b3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/47a5116e56a6b6fe1e909f244e39cd0fc26ceee4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8bb111f87ded6acb9837ec9b45d6f02cda94c51f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Denial of Service via NULL pointer dereference in af_iucv", "id": "2513190", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513190"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet/af_iucv: fix NULL deref in afiucv_hs_callback_syn()\nafiucv_hs_callback_syn() allocates the child socket with GFP_ATOMIC.\nIf the allocation fails, nsk is NULL.\nThe connection-refused path is entered when the listen state check\nfails, the accept backlog is full, or nsk is NULL. The code\nunconditionally calls iucv_sock_kill(nsk) in that path.\niucv_sock_kill() does not accept a NULL socket pointer and immediately\ndereferences sk via sock_flag(sk, SOCK_ZAPPED). When nsk is NULL,\ncalling iucv_sock_kill(nsk) results in a NULL pointer dereference.\nOnly call iucv_sock_kill() when a child socket was successfully\nallocated.", "A flaw was found in the `af_iucv` component of the Linux kernel. This vulnerability occurs when the `afiucv_hs_callback_syn()` function fails to allocate a child socket, leading to a NULL pointer being passed to `iucv_sock_kill()`. An attacker could potentially trigger this condition, causing a NULL pointer dereference and resulting in a system crash, leading to a Denial of Service (DoS)."], "name": "CVE-2026-68141", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-08-10T11:59:05Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68141\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68141\nhttps://git.kernel.org/stable/c/0e857185591fe79934427c9c0c1c31dc776be134\nhttps://git.kernel.org/stable/c/33736ff5e7c97d3348ce812e8bd2e125d840743c\nhttps://git.kernel.org/stable/c/46453b16f38ec7147351f7447e2aec6ea330f7b3\nhttps://git.kernel.org/stable/c/47a5116e56a6b6fe1e909f244e39cd0fc26ceee4\nhttps://git.kernel.org/stable/c/8bb111f87ded6acb9837ec9b45d6f02cda94c51f"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3881ac441f642d56503818123446f7298442236b,8bb111f87ded6acb9837ec9b45d6f02cda94c51f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3881ac441f642d56503818123446f7298442236b,46453b16f38ec7147351f7447e2aec6ea330f7b3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3881ac441f642d56503818123446f7298442236b,33736ff5e7c97d3348ce812e8bd2e125d840743c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3881ac441f642d56503818123446f7298442236b,0e857185591fe79934427c9c1c31dc776be134)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3881ac441f642d56503818123446f7298442236b,47a5116e56a6b6fe1e909f244e39cd0fc26ceee4)"}}], "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": "3.2"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,3.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.148,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.101,6.13.0)"}}, {"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": "semver", "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": "2026-08-10T14:15:03.850216+00:00", "updated": "2026-08-14T00:00:04.156429+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}