CVE-2024-53103

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Per kernel scoring convention vsock bugs are Local.\nAC:L - The attacker fully controls the trigger sequence \u2014 `connect()` to VMADDR_CID_HOST to get the hv_sock transport, self-delivered signal (alarm/timer) to force the `SS_UNCONNECTED`/`TCP_CLOSING` state at af_vsock.c:1524, then `connect()` to VMADDR_CID_LOCAL to force `hvs_destruct()` \u2014 and can retry the sequence indefinitely with cheap, attacker-controlled heap grooming.\nPR:L - `vsock_create()` performs no capability check, so any unprivileged local user can create AF_VSOCK sockets and drive `vsock_connect()`; the required hv_sock and vsock_loopback modules are autoloaded by that unprivileged `socket()` call via MODULE_ALIAS_NETPROTO(PF_VSOCK).\nUI:N - The entire sequence is performed by the attacker's own process through ordinary syscalls; no action by any other user or administrator is needed.\nS:U - The dangling `struct hvsock` and the corrupted kernel heap are within the guest kernel's own security authority; hv_sock is the guest-side transport, so there is no crossing into the Hyper-V host or another VM.\nC:H - A dangling `vsk->trans` gives a use-after-free on a kmalloc'd `struct hvsock`; reclaiming that slot with attacker-chosen data and having `hvs_stream_dequeue()`/`hvs_update_recv_data()` read through the stale `recv_desc`/`recv_data_off`/`recv_data_len` fields yields controlled kernel memory disclosure into userspace.\nI:H - The same UAF is a write primitive \u2014 `hvs_open_connection()` does `hvs->chan = chan` and `hvs_update_recv_data()` writes `recv_data_len`/`recv_data_off` into the freed object, so heap spraying over the reclaimed slot allows corruption of an adjacent/overlapping kernel object and control-flow hijacking.\nA:H - Even without successful exploitation the stale pointer causes dereference of freed memory (or a NULL `vsk->transport` deref from `hvs_close_timeout` \u2192 `vsock_stream_has_data()`), producing a kernel oops/panic that an unprivileged user can trigger repeatedly."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/vmw_vsock/hyperv_transport.c"], "versions": [{"version": "ae0078fcf0a5eb3a8623bfb5f988262e0911fdb9", "lessThan": "285266ef92f7b4bf7d26e1e95e215ce6a6badb4a", "status": "affected", "versionType": "git"}, {"version": "ae0078fcf0a5eb3a8623bfb5f988262e0911fdb9", "lessThan": "4fe1d42f2acc463b733bb42e3f8e67dbc2a0eb2d", "status": "affected", "versionType": "git"}, {"version": "ae0078fcf0a5eb3a8623bfb5f988262e0911fdb9", "lessThan": "414476c4fb11be070c09ab8f3e75c9ee324a108a", "status": "affected", "versionType": "git"}, {"version": "ae0078fcf0a5eb3a8623bfb5f988262e0911fdb9", "lessThan": "7cf25987820350cb950856c71b409e5b6eed52bd", "status": "affected", "versionType": "git"}, {"version": "ae0078fcf0a5eb3a8623bfb5f988262e0911fdb9", "lessThan": "98d8dde9232250a57ad5ef16479bf6a349e09b80", "status": "affected", "versionType": "git"}, {"version": "ae0078fcf0a5eb3a8623bfb5f988262e0911fdb9", "lessThan": "4bdc5a62c6e50600d8a1c3e18fd6dce0c27c9497", "status": "affected", "versionType": "git"}, {"version": "ae0078fcf0a5eb3a8623bfb5f988262e0911fdb9", "lessThan": "e0fe3392371293175f25028020ded5267f4cd8e3", "status": "affected", "versionType": "git"}, {"version": "ae0078fcf0a5eb3a8623bfb5f988262e0911fdb9", "lessThan": "8621725afb38e111969c64280b71480afde2aace", "status": "affected", "versionType": "git"}, {"version": "ae0078fcf0a5eb3a8623bfb5f988262e0911fdb9", "lessThan": "e629295bd60abf4da1db85b82819ca6a4f6c1e79", "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/vmw_vsock/hyperv_transport.c"], "versions": [{"version": "4.14", "status": "affected"}, {"version": "0", "lessThan": "4.14", "status": "unaffected", "versionType": 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"https://git.kernel.org/stable/c/8621725afb38e111969c64280b71480afde2aace"}, {"url": "https://git.kernel.org/stable/c/e629295bd60abf4da1db85b82819ca6a4f6c1e79"}], "title": "hv_sock: Initializing vsk->trans to NULL to prevent a dangling pointer", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2024-53103", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-10-01T20:11:01.150228Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": 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"cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*", "matchCriteriaId": "3C95E234-D335-4B6C-96BF-E2CEBD8654ED", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*", "matchCriteriaId": "E0F717D8-3014-4F84-8086-0124B2111379", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*", "matchCriteriaId": "24DBE6C7-2AAE-4818-AED2-E131F153D2FA", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc6:*:*:*:*:*:*", "matchCriteriaId": "24B88717-53F5-42AA-9B72-14C707639E3F", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc7:*:*:*:*:*:*", "matchCriteriaId": "1EF8CD82-1EAE-4254-9545-F85AB94CF90F", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhv_sock: Initializing vsk->trans to NULL to prevent a dangling pointer\n\nWhen hvs is released, there is a possibility that vsk->trans may not\nbe initialized to NULL, which could lead to a dangling pointer.\nThis issue is resolved by initializing vsk->trans to NULL."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: hv_sock: inicializaci\u00f3n de vsk->trans en NULL para evitar un puntero colgante. Cuando se lanza hvs, existe la posibilidad de que vsk->trans no se inicialice en NULL, lo que podr\u00eda provocar un puntero colgante. Este problema se resuelve inicializando vsk->trans en NULL."}], "id": "CVE-2024-53103", "lastModified": "2026-06-17T08:08:16.980", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-53103", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T20:11:01.150228Z", "version": "2.0.3"}}]}, "published": "2024-12-02T08:15:08.537", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/285266ef92f7b4bf7d26e1e95e215ce6a6badb4a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/414476c4fb11be070c09ab8f3e75c9ee324a108a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4bdc5a62c6e50600d8a1c3e18fd6dce0c27c9497"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4fe1d42f2acc463b733bb42e3f8e67dbc2a0eb2d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7cf25987820350cb950856c71b409e5b6eed52bd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8621725afb38e111969c64280b71480afde2aace"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/98d8dde9232250a57ad5ef16479bf6a349e09b80"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e0fe3392371293175f25028020ded5267f4cd8e3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e629295bd60abf4da1db85b82819ca6a4f6c1e79"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2025:6966", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:6966", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}], "bugzilla": {"description": "kernel: hv_sock: Initializing vsk->trans to NULL to prevent a dangling pointer", "id": "2329818", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2329818"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nhv_sock: Initializing vsk->trans to NULL to prevent a dangling pointer\nWhen hvs is released, there is a possibility that vsk->trans may not\nbe initialized to NULL, which could lead to a dangling pointer.\nThis issue is resolved by initializing vsk->trans to NULL."], "name": "CVE-2024-53103", "package_state": [{"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-12-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-53103\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-53103\nhttps://lore.kernel.org/linux-cve-announce/2024120230-CVE-2024-53103-b5ea@gregkh/T"], "statement": "This issue is considered to be a moderate impact flaw, as the exploitation in this will not cause an Intigrity (I:L) threat with the available usecase.", "threat_severity": "Moderate"}

{}