{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-53441", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53441", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2025-09-18T16:04:18.519Z", "updatedAt": "2026-05-11T19:45:03.854Z", "importedAt": "2026-10-24T01:57:03.413Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "bpf: cpumap: Fix memory leak in cpu_map_update_elem", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: cpumap: Fix memory leak in cpu_map_update_elem\n\nSyzkaller reported a memory leak as follows:\n\nBUG: memory leak\nunreferenced object 0xff110001198ef748 (size 192):\n comm \"syz-executor.3\", pid 17672, jiffies 4298118891 (age 9.906s)\n hex dump (first 32 bytes):\n 00 00 00 00 4a 19 00 00 80 ad e3 e4 fe ff c0 00 ....J...........\n 00 b2 d3 0c 01 00 11 ff 28 f5 8e 19 01 00 11 ff ........(.......\n backtrace:\n [] __cpu_map_entry_alloc+0xf7/0xb00\n [] cpu_map_update_elem+0x2fe/0x3d0\n [] bpf_map_update_value.isra.0+0x2bd/0x520\n [] map_update_elem+0x4cb/0x720\n [] __se_sys_bpf+0x8c3/0xb90\n [] do_syscall_64+0x30/0x40\n [] entry_SYSCALL_64_after_hwframe+0x61/0xc6\n\nBUG: memory leak\nunreferenced object 0xff110001198ef528 (size 192):\n comm \"syz-executor.3\", pid 17672, jiffies 4298118891 (age 9.906s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n backtrace:\n [] __cpu_map_entry_alloc+0x260/0xb00\n [] cpu_map_update_elem+0x2fe/0x3d0\n [] bpf_map_update_value.isra.0+0x2bd/0x520\n [] map_update_elem+0x4cb/0x720\n [] __se_sys_bpf+0x8c3/0xb90\n [] do_syscall_64+0x30/0x40\n [] entry_SYSCALL_64_after_hwframe+0x61/0xc6\n\nBUG: memory leak\nunreferenced object 0xff1100010fd93d68 (size 8):\n comm \"syz-executor.3\", pid 17672, jiffies 4298118891 (age 9.906s)\n hex dump (first 8 bytes):\n 00 00 00 00 00 00 00 00 ........\n backtrace:\n [] kvmalloc_node+0x11e/0x170\n [] __cpu_map_entry_alloc+0x2f0/0xb00\n [] cpu_map_update_elem+0x2fe/0x3d0\n [] bpf_map_update_value.isra.0+0x2bd/0x520\n [] map_update_elem+0x4cb/0x720\n [] __se_sys_bpf+0x8c3/0xb90\n [] do_syscall_64+0x30/0x40\n [] entry_SYSCALL_64_after_hwframe+0x61/0xc6\n\nIn the cpu_map_update_elem flow, when kthread_stop is called before\ncalling the threadfn of rcpu->kthread, since the KTHREAD_SHOULD_STOP bit\nof kthread has been set by kthread_stop, the threadfn of rcpu->kthread\nwill never be executed, and rcpu->refcnt will never be 0, which will\nlead to the allocated rcpu, rcpu->queue and rcpu->queue->queue cannot be\nreleased.\n\nCalling kthread_stop before executing kthread's threadfn will return\n-EINTR. We can complete the release of memory resources in this state.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "6710e1126934d8b4372b4d2f9ae1646cd3f151bf", "status": "affected", "versionType": "git", "lessThan": "d26299f50f5ea8f0aeb5d49e659c31f64233c816" }, { "version": "6710e1126934d8b4372b4d2f9ae1646cd3f151bf", "status": "affected", "versionType": "git", "lessThan": "b11a9b4f28cb6ff69ef7e69809e5f7fffeac9030" }, { "version": "6710e1126934d8b4372b4d2f9ae1646cd3f151bf", "status": "affected", "versionType": "git", "lessThan": "a957ac8e0b5ffb5797382a6adbafd005a5f72851" }, { "version": "6710e1126934d8b4372b4d2f9ae1646cd3f151bf", "status": "affected", "versionType": "git", "lessThan": "4369016497319a9635702da010d02af1ebb1849d" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.15", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.15" }, { "version": "5.15.121", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.40", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.4.5", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.4.*" }, { "version": "6.5", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }