248 lines
13 KiB
JSON
248 lines
13 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-2026-89490",
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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": "2026-09-11T19:38:34.713Z",
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"datePublished": "2026-09-11T19:43:42.808Z",
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"dateUpdated": "2026-10-19T08:47:41.930Z"
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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": "2026-10-19T08:47:41.930Z"
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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\nocfs2: fix readdir position truncation on 32-bit kernels\n\nIn ocfs2_dir_foreach_blk_el(), the directory cookie position is\nrebuilt with\n\n\tctx->pos = (ctx->pos & ~(sb->s_blocksize - 1)) | offset;\n\n`ctx->pos` is loff_t (signed 64-bit), while `sb->s_blocksize` is\nunsigned long. On 32-bit kernels unsigned long is 32-bit, so the mask\n\n\t~(sb->s_blocksize - 1)\n\nis computed as a 32-bit unsigned value (e.g. 0xfffff000 for a 4 KiB\nblock size). In the AND expression with the 64-bit `ctx->pos`, that\nunsigned operand is zero-extended to 64 bits per the usual arithmetic\nconversions, yielding 0x00000000fffff000. The high 32 bits of\n`ctx->pos` are silently cleared, even though directory size is\nallowed to exceed 4 GiB.\n\nWhen readdir() crosses the 4 GiB boundary on a 32-bit kernel the\nposition is reset back into the first 4 GiB block, making the\nre-validation path re-enumerate already-returned dirents indefinitely.\n\nThis is ocfs2_dir_foreach_blk_el(), the extent-list readdir path taken\nfor all non-inline directories, so a directory large enough to cross\n4 GiB reaches it.\n\nThis is the same class of bug that commit 3dce5bb82c97 (\"exfat: Fix\nbitwise operation having different size\") fixed in exfat, and the\nfix mirrors the equivalent ext4 fix in this series. Cast the operand\nto loff_t so the mask is 64-bit before the AND:\n\n\tctx->pos = (ctx->pos & ~((loff_t)sb->s_blocksize - 1)) | offset;\n\n64-bit kernels are unaffected."
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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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"fs/ocfs2/dir.c"
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],
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"versions": [
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{
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"version": "ccd979bdbce9fba8412beb3f1de68a9d0171b12c",
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"lessThan": "c28dc3407937aa8f225942538cd585c9b28ea65a",
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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": "ccd979bdbce9fba8412beb3f1de68a9d0171b12c",
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"lessThan": "94569154ba49f5f85645d2019c8e206213d8404e",
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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": "ccd979bdbce9fba8412beb3f1de68a9d0171b12c",
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"lessThan": "1ae7029823ae4c91664cb32eec7fb8dd5e1a337a",
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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": "ccd979bdbce9fba8412beb3f1de68a9d0171b12c",
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"lessThan": "f9dd5cad8d09110ddff2db1fe756aae93c7552ff",
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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": "ccd979bdbce9fba8412beb3f1de68a9d0171b12c",
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"lessThan": "1001fb3b69a11eaa0dc7c7428f6edfa48b88997a",
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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": "ccd979bdbce9fba8412beb3f1de68a9d0171b12c",
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"lessThan": "c0c165487a2ea5a37ddcdab4259157b7a527129c",
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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": "ccd979bdbce9fba8412beb3f1de68a9d0171b12c",
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"lessThan": "b53e2b271eeb6040c2a4a78230c570dc41cdcfa4",
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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": "ccd979bdbce9fba8412beb3f1de68a9d0171b12c",
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"lessThan": "a63308ab426f3a3c7e33b02c150ea59054620261",
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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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"fs/ocfs2/dir.c"
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],
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"versions": [
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{
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"version": "2.6.16",
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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": "2.6.16",
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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": "5.10.270",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.221",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.188",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.157",
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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": "6.12.109",
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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": "6.18.50",
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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": "7.2.4",
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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": "2.6.16",
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"versionEndExcluding": "5.10.270"
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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": "2.6.16",
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"versionEndExcluding": "5.15.221"
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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": "2.6.16",
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"versionEndExcluding": "6.1.188"
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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": "2.6.16",
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"versionEndExcluding": "6.6.157"
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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": "2.6.16",
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"versionEndExcluding": "6.12.109"
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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": "2.6.16",
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"versionEndExcluding": "6.18.50"
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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": "2.6.16",
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"versionEndExcluding": "7.2.4"
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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": "2.6.16",
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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/c28dc3407937aa8f225942538cd585c9b28ea65a"
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},
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{
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"url": "https://git.kernel.org/stable/c/94569154ba49f5f85645d2019c8e206213d8404e"
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},
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{
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"url": "https://git.kernel.org/stable/c/1ae7029823ae4c91664cb32eec7fb8dd5e1a337a"
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},
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{
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"url": "https://git.kernel.org/stable/c/f9dd5cad8d09110ddff2db1fe756aae93c7552ff"
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},
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{
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"url": "https://git.kernel.org/stable/c/1001fb3b69a11eaa0dc7c7428f6edfa48b88997a"
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},
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{
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"url": "https://git.kernel.org/stable/c/c0c165487a2ea5a37ddcdab4259157b7a527129c"
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},
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{
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"url": "https://git.kernel.org/stable/c/b53e2b271eeb6040c2a4a78230c570dc41cdcfa4"
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},
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{
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"url": "https://git.kernel.org/stable/c/a63308ab426f3a3c7e33b02c150ea59054620261"
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}
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],
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"title": "ocfs2: fix readdir position truncation on 32-bit kernels",
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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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} |