CVE-2024-42068

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No remote peer can drive `bpf_prog_select_runtime()`.\nAC:L - A local attacker can repeatedly load interpreted BPF programs in a loop while driving the machine into reclaim pressure, which is the condition that makes `split_large_page()`'s page-table allocation fail and return -ENOMEM out of `set_memory_ro()`. 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rewriting the `insnsi[]` stream turns the BPF interpreter into an arbitrary kernel-memory read primitive.\nI:H - The unprotected region contains both the executed eBPF bytecode and the `bpf_func` function pointer, so the lost `set_memory_ro()` gives an attacker a path to arbitrary kernel writes and arbitrary function calls \u2014 exactly the integrity guarantee this code exists to enforce.\nA:H - A BPF program whose instruction stream or `bpf_func` pointer can be altered executes attacker-chosen kernel control flow, trivially producing an oops or panic, so the availability impact of the lost protection is a full kernel crash."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/linux/filter.h", "kernel/bpf/core.c", "kernel/bpf/verifier.c"], "versions": [{"version": "60a3b2253c413cf601783b070507d7dd6620c954", "lessThan": 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{"bugzilla": {"description": "kernel: bpf: Take return from set_memory_ro() into account with bpf_prog_lock_ro()", "id": "2300506", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2300506"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-120", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: Take return from set_memory_ro() into account with bpf_prog_lock_ro()\nset_memory_ro() can fail, leaving memory unprotected.\nCheck its return and take it into account as an error."], "name": "CVE-2024-42068", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "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": "2024-07-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-42068\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-42068\nhttps://lore.kernel.org/linux-cve-announce/2024072951-CVE-2024-42068-9265@gregkh/T"], "threat_severity": "Low"}

{}