{"api_version":"1","generated_at":"2026-11-10T17:21:27+00:00","cve":"CVE-2023-52928","urls":{"html":"https://cve.report/CVE-2023-52928","api":"https://cve.report/api/cve/CVE-2023-52928.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-52928","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-52928"},"summary":{"title":"bpf: Skip invalid kfunc call in backtrack_insn","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Skip invalid kfunc call in backtrack_insn\n\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\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/","state":"PUBLISHED","assigner":"Linux","published_at":"2025-03-27 17:15:42","updated_at":"2026-11-05 21:17:05"},"problem_types":["NVD-CWE-noinfo"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"5.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"references":[{"url":"https://git.kernel.org/stable/c/6e2fac197de2c4c041bdd8982cffb104689113f1","name":"https://git.kernel.org/stable/c/6e2fac197de2c4c041bdd8982cffb104689113f1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d3178e8a434b58678d99257c0387810a24042fb6","name":"https://git.kernel.org/stable/c/d3178e8a434b58678d99257c0387810a24042fb6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/74eec8266f37aff609db6a2f2b093e56a11c28c4","name":"https://git.kernel.org/stable/c/74eec8266f37aff609db6a2f2b093e56a11c28c4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-52928","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52928","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e6ac2450d6dee3121cd8bbf2907b78a68a8a353d 6e2fac197de2c4c041bdd8982cffb104689113f1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e6ac2450d6dee3121cd8bbf2907b78a68a8a353d 74eec8266f37aff609db6a2f2b093e56a11c28c4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e6ac2450d6dee3121cd8bbf2907b78a68a8a353d d3178e8a434b58678d99257c0387810a24042fb6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.93 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.11 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"52928","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2023-52928","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-11-05T20:13:55.097270Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-11-05T20:20:52.893Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/bpf/verifier.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"6e2fac197de2c4c041bdd8982cffb104689113f1","status":"affected","version":"e6ac2450d6dee3121cd8bbf2907b78a68a8a353d","versionType":"git"},{"lessThan":"74eec8266f37aff609db6a2f2b093e56a11c28c4","status":"affected","version":"e6ac2450d6dee3121cd8bbf2907b78a68a8a353d","versionType":"git"},{"lessThan":"d3178e8a434b58678d99257c0387810a24042fb6","status":"affected","version":"e6ac2450d6dee3121cd8bbf2907b78a68a8a353d","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/bpf/verifier.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.13"},{"lessThan":"5.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.93","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.93","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.11","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.2","versionStartIncluding":"5.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Skip invalid kfunc call in backtrack_insn\n\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\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/"}],"providerMetadata":{"dateUpdated":"2026-05-11T19:35:53.339Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/6e2fac197de2c4c041bdd8982cffb104689113f1"},{"url":"https://git.kernel.org/stable/c/74eec8266f37aff609db6a2f2b093e56a11c28c4"},{"url":"https://git.kernel.org/stable/c/d3178e8a434b58678d99257c0387810a24042fb6"}],"title":"bpf: Skip invalid kfunc call in backtrack_insn","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2023-52928","datePublished":"2025-03-27T16:37:10.471Z","dateReserved":"2024-08-21T06:07:11.018Z","dateUpdated":"2026-11-05T20:20:52.893Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-03-27 17:15:42","lastModifiedDate":"2026-11-05 21:17:05","problem_types":["NVD-CWE-noinfo"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-11-05T20:13:55.097270Z","id":"CVE-2023-52928","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"5.15.93","matchCriteriaId":"9160197A-606C-4AAF-91FD-A61425E3EEAE"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1.11","matchCriteriaId":"535D03F4-DA02-49FE-934E-668827E6407B"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*","matchCriteriaId":"FF501633-2F44-4913-A8EE-B021929F49F6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*","matchCriteriaId":"2BDA597B-CAC1-4DF0-86F0-42E142C654E9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*","matchCriteriaId":"725C78C9-12CE-406F-ABE8-0813A01D66E8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:*","matchCriteriaId":"A127C155-689C-4F67-B146-44A57F4BFD85"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2023","CveId":"52928","Ordinal":"1","Title":"bpf: Skip invalid kfunc call in backtrack_insn","CVE":"CVE-2023-52928","Year":"2023"},"notes":[{"CveYear":"2023","CveId":"52928","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Skip invalid kfunc call in backtrack_insn\n\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\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/","Type":"Description","Title":"bpf: Skip invalid kfunc call in backtrack_insn"}]}}}