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        "cveId": "CVE-2024-42161",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-07-29T15:50:41.196Z",
        "datePublished": "2024-07-30T07:47:03.136Z",
        "dateUpdated": "2024-09-11T17:34:33.542Z"
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            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Avoid uninitialized value in BPF_CORE_READ_BITFIELD\n\n[Changes from V1:\n - Use a default branch in the switch statement to initialize `val'.]\n\nGCC warns that `val' may be used uninitialized in the\nBPF_CRE_READ_BITFIELD macro, defined in bpf_core_read.h as:\n\n\t[...]\n\tunsigned long long val;\t\t\t\t\t\t      \\\n\t[...]\t\t\t\t\t\t\t\t      \\\n\tswitch (__CORE_RELO(s, field, BYTE_SIZE)) {\t\t\t      \\\n\tcase 1: val = *(const unsigned char *)p; break;\t\t\t      \\\n\tcase 2: val = *(const unsigned short *)p; break;\t\t      \\\n\tcase 4: val = *(const unsigned int *)p; break;\t\t\t      \\\n\tcase 8: val = *(const unsigned long long *)p; break;\t\t      \\\n        }       \t\t\t\t\t\t\t      \\\n\t[...]\n\tval;\t\t\t\t\t\t\t\t      \\\n\t}\t\t\t\t\t\t\t\t      \\\n\nThis patch adds a default entry in the switch statement that sets\n`val' to zero in order to avoid the warning, and random values to be\nused in case __builtin_preserve_field_info returns unexpected values\nfor BPF_FIELD_BYTE_SIZE.\n\nTested in bpf-next master.\nNo regressions."
                }
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            "affected": [
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                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "tools/lib/bpf/bpf_core_read.h"
                    ],
                    "versions": [
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                            "version": "1da177e4c3f4",
                            "lessThan": "b694989bb13e",
                            "status": "affected",
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                        {
                            "version": "1da177e4c3f4",
                            "lessThan": "3364c2ed1c24",
                            "status": "affected",
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                            "version": "1da177e4c3f4",
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                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                    "versions": [
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                            "version": "5.10.222",
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                            "status": "unaffected",
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                            "version": "5.15.163",
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                            "version": "6.10",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/b694989bb13ed5f166e633faa1eb0f21c6d261a6"
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                    "url": "https://git.kernel.org/stable/c/009367099eb61a4fc2af44d4eb06b6b4de7de6db"
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