CVE-2023-52928

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However, this can lead to the following\nwarning in backtrack_insn(), also see [1]:\n\n ------------[ cut here ]------------\n verifier backtracking bug\n WARNING: CPU: 6 PID: 8646 at kernel/bpf/verifier.c:2756 backtrack_insn\n kernel/bpf/verifier.c:2756\n\t__mark_chain_precision kernel/bpf/verifier.c:3065\n\tmark_chain_precision kernel/bpf/verifier.c:3165\n\tadjust_reg_min_max_vals kernel/bpf/verifier.c:10715\n\tcheck_alu_op kernel/bpf/verifier.c:10928\n\tdo_check kernel/bpf/verifier.c:13821 [inline]\n\tdo_check_common kernel/bpf/verifier.c:16289\n [...]\n\nSo make backtracking conservative with this by returning ENOTSUPP.\n\n [1] https://lore.kernel.org/bpf/CACkBjsaXNceR8ZjkLG=dT3P=4A8SBsg0Z5h5PWLryF5=ghKq=g@mail.gmail.com/"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Omite llamada kfunc no v\u00e1lida en backtrack_insn El verificador omite llamada kfunc no v\u00e1lida en check_kfunc_call(), que se capturar\u00eda en fixup_kfunc_call() si dicha insn no se elimina mediante la eliminaci\u00f3n de c\u00f3digo muerto. Sin embargo, esto puede generar la siguiente advertencia en backtrack_insn(), vea tambi\u00e9n [1]: ------------[ cortar aqu\u00ed ]------------ error de retroceso del verificador ADVERTENCIA: CPU: 6 PID: 8646 en kernel/bpf/verifier.c:2756 backtrack_insn kernel/bpf/verifier.c:2756 __mark_chain_precision kernel/bpf/verifier.c:3065 mark_chain_precision kernel/bpf/verifier.c:3165 adjust_reg_min_max_vals kernel/bpf/verifier.c:10715 check_alu_op kernel/bpf/verifier.c:10928 do_check kernel/bpf/verifier.c:13821 [en l\u00ednea] do_check_common kernel/bpf/verifier.c:16289 [...] As\u00ed que haga que el retroceso sea conservador con esto devolviendo ENOTSUPP. [1] https://lore.kernel.org/bpf/CACkBjsaXNceR8ZjkLG=dT3P=4A8SBsg0Z5h5PWLryF5=ghKq=g@mail.gmail.com/"}], "id": "CVE-2023-52928", "lastModified": "2026-11-05T21:17:05.867", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-52928", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T20:13:55.097270Z", "version": "2.0.3"}}]}, "published": "2025-03-27T17:15:42.230", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6e2fac197de2c4c041bdd8982cffb104689113f1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/74eec8266f37aff609db6a2f2b093e56a11c28c4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d3178e8a434b58678d99257c0387810a24042fb6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: bpf: Skip invalid kfunc call in backtrack_insn", "id": "2355443", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2355443"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: Skip invalid kfunc call in backtrack_insn\nThe verifier skips invalid kfunc call in check_kfunc_call(), which\nwould be captured in fixup_kfunc_call() if such insn is not eliminated\nby dead code elimination. However, this can lead to the following\nwarning in backtrack_insn(), also see [1]:\n------------[ cut here ]------------\nverifier backtracking bug\nWARNING: CPU: 6 PID: 8646 at kernel/bpf/verifier.c:2756 backtrack_insn\nkernel/bpf/verifier.c:2756\n__mark_chain_precision kernel/bpf/verifier.c:3065\nmark_chain_precision kernel/bpf/verifier.c:3165\nadjust_reg_min_max_vals kernel/bpf/verifier.c:10715\ncheck_alu_op kernel/bpf/verifier.c:10928\ndo_check kernel/bpf/verifier.c:13821 [inline]\ndo_check_common kernel/bpf/verifier.c:16289\n[...]\nSo make backtracking conservative with this by returning ENOTSUPP.\n[1] https://lore.kernel.org/bpf/CACkBjsaXNceR8ZjkLG=dT3P=4A8SBsg0Z5h5PWLryF5=ghKq=g@mail.gmail.com/"], "name": "CVE-2023-52928", "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": "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "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"}], "public_date": "2025-03-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52928\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52928\nhttps://lore.kernel.org/linux-cve-announce/2025032718-CVE-2023-52928-e380@gregkh/T"], "threat_severity": "Low"}

{"created": "2025-07-12T22:09:50.708938+00:00", "updated": "2025-07-12T22:09:50.709004+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}