201 lines
9.8 KiB
JSON
201 lines
9.8 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-2026-97906",
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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": "2026-09-25T10:18:58.200Z",
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"datePublished": "2026-09-25T10:22:31.640Z",
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"dateUpdated": "2026-10-21T12:53:32.335Z"
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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": "2026-10-21T12:53:32.335Z"
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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\nbootconfig: Fix integer overflow in initrd size check\n\nSashiko reported that in get_boot_config_from_initrd(), a crafted initrd\nwith a huge bootconfig size (such as 0xFFFFFFFF) can cause the pointer\narithmetic:\n\n data = ((void *)hdr) - size;\n\nto wrap around on 32-bit systems (or when pointer subtraction overflows).\nBecause data wraps around, the subsequent bounds check:\n\n if ((unsigned long)data < initrd_start)\n\nevaluates to false, bypassing the check. The kernel then calls\nxbc_calc_checksum(data, size), which attempts to read 4GB of memory,\nhitting unmapped pages and triggering a fatal kernel page fault during\nearly boot. Furthermore, on 64-bit systems with an initrd > 4.29 GB, an\nunbounded 32-bit size can similarly bypass the initrd_start check.\n\nFix this by:\n1. Ensuring the initrd is at least large enough to contain the bootconfig\n footer and verifying hdr is within the initrd bounds.\n2. Checking that size does not exceed XBC_DATA_MAX and does not exceed\n the available space between initrd_start and hdr before performing\n pointer subtraction."
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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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"init/main.c"
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],
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"versions": [
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{
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"version": "de462e5f10718517bacf2f84c8aa2804567ef7df",
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"lessThan": "97be05f33f79342ea65d9b99c9ad07a93b8eef5a",
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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": "de462e5f10718517bacf2f84c8aa2804567ef7df",
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"lessThan": "4d45bc0f8cdf606d5409b5f64a8a6609f6520c03",
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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": "de462e5f10718517bacf2f84c8aa2804567ef7df",
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"lessThan": "8d4343a411eaa182d323ab5b149496416015f27d",
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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": "de462e5f10718517bacf2f84c8aa2804567ef7df",
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"lessThan": "bff9a1579e2c9b2a59fdf3793becc9d7bf5ff1a6",
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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": "de462e5f10718517bacf2f84c8aa2804567ef7df",
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"lessThan": "7812d6dab0698001e50e8c2f901e17da3eb6f429",
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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": "32394df25d8e46935b442b429d74b37885c4f092",
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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": "5.6.14",
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"lessThan": "5.7",
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"status": "affected",
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"versionType": "semver"
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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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"init/main.c"
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],
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"versions": [
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{
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"version": "5.7",
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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": "5.7",
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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": "6.12.112",
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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": "6.18.53",
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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": "5.7",
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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": "5.7",
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"versionEndExcluding": "6.12.112"
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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": "5.7",
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"versionEndExcluding": "6.18.53"
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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": "5.7",
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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": "5.7",
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"versionEndExcluding": "7.3"
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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": "5.6.14"
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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/97be05f33f79342ea65d9b99c9ad07a93b8eef5a"
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},
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{
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"url": "https://git.kernel.org/stable/c/4d45bc0f8cdf606d5409b5f64a8a6609f6520c03"
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},
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{
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"url": "https://git.kernel.org/stable/c/8d4343a411eaa182d323ab5b149496416015f27d"
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},
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{
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"url": "https://git.kernel.org/stable/c/bff9a1579e2c9b2a59fdf3793becc9d7bf5ff1a6"
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},
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{
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"url": "https://git.kernel.org/stable/c/7812d6dab0698001e50e8c2f901e17da3eb6f429"
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}
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],
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"title": "bootconfig: Fix integer overflow in initrd size check",
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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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} |