{"id":"CVE-2024-53125","revision":null,"records":[{"revision":"c418b15b88df4dfb9f1e04a23df6c079","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2024-53125","aliases":[],"title":"bpf: sync_linked_regs() must preserve subreg_def","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: sync_linked_regs() must preserve subreg_def\n\nRange propagation must not affect subreg_def marks, otherwise the\nfollowing example is rewritten by verifier incorrectly when\nBPF_F_TEST_RND_HI32 flag is set:\n\n 0: call bpf_ktime_get_ns call bpf_ktime_get_ns\n 1: r0 &= 0x7fffffff after verifier r0 &= 0x7fffffff\n 2: w1 = w0 rewrites w1 = w0\n 3: if w0 < 10 goto +0 --------------> r11 = 0x2f5674a6 (r)\n 4: r1 >>= 32 r11 <<= 32 (r)\n 5: r0 = r1 r1 |= r11 (r)\n 6: exit; if w0 < 0xa goto pc+0\n r1 >>= 32\n r0 = r1\n exit\n\n(or zero extension of w1 at (2) is missing for architectures that\n require zero extension for upper register half).\n\nThe following happens w/o this patch:\n- r0 is marked as not a subreg at (0);\n- w1 is marked as subreg at (2);\n- w1 subreg_def is overridden at (3) by copy_register_state();\n- w1 is read at (5) but mark_insn_zext() does not mark (2)\n for zero extension, because w1 subreg_def is not set;\n- because of BPF_F_TEST_RND_HI32 flag verifier inserts random\n value for hi32 bits of (2) (marked (r));\n- this random value is read at (5).","state":0,"publishedAt":"2024-12-04T14:11:09.326+00:00","modifiedAt":"2026-10-15T21:41:45.968+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"kernel/bpf/verifier.c\"\n ],\n \"versions\": [\n {\n \"version\": \"75748837b7e56919679e02163f45d5818c644d03\",\n \"lessThan\": \"dadf82c1b2608727bcc306843b540cd7414055a7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"75748837b7e56919679e02163f45d5818c644d03\",\n \"lessThan\": \"b57ac2d92c1f565743f6890a5b9cf317ed856b09\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"75748837b7e56919679e02163f45d5818c644d03\",\n \"lessThan\": \"60fd3538d2a8fd44c41d25088c0ece3e1fd30659\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"75748837b7e56919679e02163f45d5818c644d03\",\n \"lessThan\": \"bfe9446ea1d95f6cb7848da19dfd58d2eec6fd84\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"75748837b7e56919679e02163f45d5818c644d03\",\n \"lessThan\": \"e2ef0f317a52e678fe8fa84b94d6a15b466d6ff0\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"75748837b7e56919679e02163f45d5818c644d03\",\n \"lessThan\": \"e9bd9c498cb0f5843996dbe5cbce7a1836a83c70\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"kernel/bpf/verifier.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.10\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.10\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.232\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.175\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.121\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.67\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.11.6\",\n \"lessThanOrEqual\": \"6.11.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/dadf82c1b2608727bcc306843b540cd7414055a7","https://git.kernel.org/stable/c/b57ac2d92c1f565743f6890a5b9cf317ed856b09","https://git.kernel.org/stable/c/60fd3538d2a8fd44c41d25088c0ece3e1fd30659","https://git.kernel.org/stable/c/bfe9446ea1d95f6cb7848da19dfd58d2eec6fd84","https://git.kernel.org/stable/c/e2ef0f317a52e678fe8fa84b94d6a15b466d6ff0","https://git.kernel.org/stable/c/e9bd9c498cb0f5843996dbe5cbce7a1836a83c70"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-53125","license":"CVE Program Terms of Use","key":"cve-program:CVE-2024-53125","identifiers":["CVE-2024-53125"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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