{"dataType":"CVE_RECORD","cveMetadata":{"cveId":"CVE-2023-52447","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-02-20T12:30:33.292Z","datePublished":"2024-02-22T16:21:39.032Z","dateUpdated":"2025-05-04T07:36:44.024Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:36:44.024Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Defer the free of inner map when necessary\n\nWhen updating or deleting an inner map in map array or map htab, the map\nmay still be accessed by non-sleepable program or sleepable program.\nHowever bpf_map_fd_put_ptr() decreases the ref-counter of the inner map\ndirectly through bpf_map_put(), if the ref-counter is the last one\n(which is true for most cases), the inner map will be freed by\nops->map_free() in a kworker. But for now, most .map_free() callbacks\ndon't use synchronize_rcu() or its variants to wait for the elapse of a\nRCU grace period, so after the invocation of ops->map_free completes,\nthe bpf program which is accessing the inner map may incur\nuse-after-free problem.\n\nFix the free of inner map by invoking bpf_map_free_deferred() after both\none RCU grace period and one tasks trace RCU grace period if the inner\nmap has been removed from the outer map before. The deferment is\naccomplished by using call_rcu() or call_rcu_tasks_trace() when\nreleasing the last ref-counter of bpf map. The newly-added rcu_head\nfield in bpf_map shares the same storage space with work field to\nreduce the size of bpf_map."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/bpf.h","kernel/bpf/map_in_map.c","kernel/bpf/syscall.c"],"versions":[{"version":"bba1dc0b55ac462d24ed1228ad49800c238cd6d7","lessThan":"90c445799fd1dc214d7c6279c144e33a35e29ef2","status":"affected","versionType":"git"},{"version":"bba1dc0b55ac462d24ed1228ad49800c238cd6d7","lessThan":"37d98fb9c3144c0fddf7f6e99aece9927ac8dce6","status":"affected","versionType":"git"},{"version":"bba1dc0b55ac462d24ed1228ad49800c238cd6d7","lessThan":"62fca83303d608ad4fec3f7428c8685680bb01b0","status":"affected","versionType":"git"},{"version":"bba1dc0b55ac462d24ed1228ad49800c238cd6d7","lessThan":"f91cd728b10c51f6d4a39957ccd56d1e802fc8ee","status":"affected","versionType":"git"},{"version":"bba1dc0b55ac462d24ed1228ad49800c238cd6d7","lessThan":"bfd9b20c4862f41d4590fde11d70a5eeae53dcc5","status":"affected","versionType":"git"},{"version":"bba1dc0b55ac462d24ed1228ad49800c238cd6d7","lessThan":"876673364161da50eed6b472d746ef88242b2368","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/bpf.h","kernel/bpf/map_in_map.c","kernel/bpf/syscall.c"],"versions":[{"version":"5.9","status":"affected"},{"version":"0","lessThan":"5.9","status":"unaffected","versionType":"semver"},{"version":"5.10.214","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.153","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.75","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.14","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.7.2","lessThanOrEqual":"6.7.*","status":"unaffected","versionType":"semver"},{"version":"6.8","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":"5.9","versionEndExcluding":"5.10.214"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"5.15.153"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"6.1.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"6.6.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"6.7.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"6.8"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/90c445799fd1dc214d7c6279c144e33a35e29ef2"},{"url":"https://git.kernel.org/stable/c/37d98fb9c3144c0fddf7f6e99aece9927ac8dce6"},{"url":"https://git.kernel.org/stable/c/62fca83303d608ad4fec3f7428c8685680bb01b0"},{"url":"https://git.kernel.org/stable/c/f91cd728b10c51f6d4a39957ccd56d1e802fc8ee"},{"url":"https://git.kernel.org/stable/c/bfd9b20c4862f41d4590fde11d70a5eeae53dcc5"},{"url":"https://git.kernel.org/stable/c/876673364161da50eed6b472d746ef88242b2368"}],"title":"bpf: Defer the free of inner map when necessary","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-416","lang":"en","description":"CWE-416 Use After Free"}]}],"affected":[{"vendor":"linux","product":"linux_kernel","cpes":["cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","versions":[{"version":"bba1dc0b55ac","status":"affected","lessThan":"90c445799fd1","versionType":"git"},{"version":"bba1dc0b55ac","status":"affected","lessThan":"37d98fb9c314","versionType":"git"},{"version":"bba1dc0b55ac","status":"affected","lessThan":"62fca83303d6","versionType":"git"},{"version":"bba1dc0b55ac","status":"affected","lessThan":"f91cd728b10c","versionType":"git"},{"version":"bba1dc0b55ac","status":"affected","lessThan":"bfd9b20c4862","versionType":"git"},{"version":"bba1dc0b55ac","status":"affected","lessThan":"876673364161","versionType":"git"}]},{"vendor":"linux","product":"linux_kernel","cpes":["cpe:2.3:o:linux:linux_kernel:5.9:*:*:*:*:*:*:*"],"defaultStatus":"affected","versions":[{"version":"5.9","status":"affected"}]},{"vendor":"linux","product":"linux_kernel","cpes":["cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*"],"defaultStatus":"affected","versions":[{"version":"0","status":"unaffected","lessThan":"5.9","versionType":"custom"},{"version":"5.10.214","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"custom"},{"version":"5.15.153","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"custom"},{"version":"6.1.75","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"custom"},{"version":"6.6.14","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"custom"},{"version":"6.7.2","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"custom"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"custom"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":6.7,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"HIGH","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2024-10-15T21:02:24.907266Z","id":"CVE-2023-52447","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-10-15T21:08:15.323Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T22:55:41.700Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/90c445799fd1dc214d7c6279c144e33a35e29ef2","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/37d98fb9c3144c0fddf7f6e99aece9927ac8dce6","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/62fca83303d608ad4fec3f7428c8685680bb01b0","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/f91cd728b10c51f6d4a39957ccd56d1e802fc8ee","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/bfd9b20c4862f41d4590fde11d70a5eeae53dcc5","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/876673364161da50eed6b472d746ef88242b2368","tags":["x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html","tags":["x_transferred"]}]}]},"dataVersion":"5.1"}