185 lines
9.0 KiB
JSON
185 lines
9.0 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-98043",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-25T10:19:56.071Z",
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"datePublished": "2026-09-25T10:23:54.865Z",
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"dateUpdated": "2026-10-21T12:54:11.750Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-21T12:54:11.750Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Don't infer non-NULL from a pointer with an unbounded offset\n\nreg_not_null() decides that a register holds a non-NULL value by\nlooking at its type alone. For pointer types that allow arithmetic the\ntype only guarantees a non-NULL base, in case of an unbound offset\nthe runtime offset value might still add up to NULL.\nConsider the followng program:\n\n r6 = bpf_map_lookup_elem(map, &0); /* present */\n if (r6 == 0) return 0;\n r7 = bpf_map_lookup_elem(map, &1); /* absent, NULL at runtime */\n r8 = r7;\n r8 -= r6; /* pointer - pointer: unknown scalar, -r6 */\n r8 <<= 1;\n r8 >>= 1; /* any non-negative offset is accepted by */\n /* check_reg_sane_offset_ptr() */\n r6 += r8; /* verifier: map value; runtime: zero */\n if (r7 != r6) return 0;\n *(u8 *)(r7 + 0); /* r7 is inferred non-NULL, both are zero */\n\nAt runtime both registers are zero, the comparison is true and the\nload faults with NULL pointer dereference.\n\nRequire the offset to be within +-BPF_MAX_VAR_OFF in reg_not_null()."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"kernel/bpf/verifier.c"
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],
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"versions": [
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{
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"version": "cac616db39c207dc63465a4e05c6ce0e60b2cce4",
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"lessThan": "8b414dbe97fcefd116e5a620c3bd9993014aa4ce",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "cac616db39c207dc63465a4e05c6ce0e60b2cce4",
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"lessThan": "019d845a08b8ccfe8eefaaf4bca6870f2b8c58ae",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "cac616db39c207dc63465a4e05c6ce0e60b2cce4",
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"lessThan": "65bea674f43c09c0eda033a140dfac6a2842a19f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "cac616db39c207dc63465a4e05c6ce0e60b2cce4",
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"lessThan": "cb6642048739bf4ee5aa09fe465511f1e87caa63",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "cac616db39c207dc63465a4e05c6ce0e60b2cce4",
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"lessThan": "67b529f521a6676cdfc78b91b0217d7eaa84216b",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"kernel/bpf/verifier.c"
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],
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"versions": [
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{
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"version": "5.8",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.8",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.114",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.57",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.7",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "6.6.160"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "6.12.114"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "6.18.57"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "7.2.7"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/8b414dbe97fcefd116e5a620c3bd9993014aa4ce"
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},
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{
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"url": "https://git.kernel.org/stable/c/019d845a08b8ccfe8eefaaf4bca6870f2b8c58ae"
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},
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{
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"url": "https://git.kernel.org/stable/c/65bea674f43c09c0eda033a140dfac6a2842a19f"
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},
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{
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"url": "https://git.kernel.org/stable/c/cb6642048739bf4ee5aa09fe465511f1e87caa63"
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},
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{
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"url": "https://git.kernel.org/stable/c/67b529f521a6676cdfc78b91b0217d7eaa84216b"
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}
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],
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"title": "bpf: Don't infer non-NULL from a pointer with an unbounded offset",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |