{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-54033","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-12-24T10:53:46.180Z","datePublished":"2025-12-24T10:56:00.579Z","dateUpdated":"2026-05-11T19:54:07.901Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:54:07.901Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix a memory leak in the LRU and LRU_PERCPU hash maps\n\nThe LRU and LRU_PERCPU maps allocate a new element on update before locking the\ntarget hash table bucket. Right after that the maps try to lock the bucket.\nIf this fails, then maps return -EBUSY to the caller without releasing the\nallocated element. This makes the element untracked: it doesn't belong to\neither of free lists, and it doesn't belong to the hash table, so can't be\nre-used; this eventually leads to the permanent -ENOMEM on LRU map updates,\nwhich is unexpected. Fix this by returning the element to the local free list\nif bucket locking fails."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/hashtab.c"],"versions":[{"version":"20b6cc34ea74b6a84599c1f8a70f3315b56a1883","lessThan":"79ea1a12fb9a8275b6e19d4ca625dd872dedcbb9","status":"affected","versionType":"git"},{"version":"20b6cc34ea74b6a84599c1f8a70f3315b56a1883","lessThan":"1a9e80f757bbb1562d82e350afce2bb2f712cc3d","status":"affected","versionType":"git"},{"version":"20b6cc34ea74b6a84599c1f8a70f3315b56a1883","lessThan":"965e9cccbe6b9c7b379908cebcb5e3a47f20dd5e","status":"affected","versionType":"git"},{"version":"20b6cc34ea74b6a84599c1f8a70f3315b56a1883","lessThan":"b34ffb0c6d23583830f9327864b9c1f486003305","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/hashtab.c"],"versions":[{"version":"5.11","status":"affected"},{"version":"0","lessThan":"5.11","status":"unaffected","versionType":"semver"},{"version":"5.15.115","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.31","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.3.5","lessThanOrEqual":"6.3.*","status":"unaffected","versionType":"semver"},{"version":"6.4","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":"5.11","versionEndExcluding":"5.15.115"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.1.31"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.3.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.4"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/79ea1a12fb9a8275b6e19d4ca625dd872dedcbb9"},{"url":"https://git.kernel.org/stable/c/1a9e80f757bbb1562d82e350afce2bb2f712cc3d"},{"url":"https://git.kernel.org/stable/c/965e9cccbe6b9c7b379908cebcb5e3a47f20dd5e"},{"url":"https://git.kernel.org/stable/c/b34ffb0c6d23583830f9327864b9c1f486003305"}],"title":"bpf: fix a memory leak in the LRU and LRU_PERCPU hash maps","x_generator":{"engine":"bippy-1.2.0"}}}}