143 lines
7.2 KiB
JSON
143 lines
7.2 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-2026-72431",
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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": "2026-08-09T03:40:39.929Z",
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"datePublished": "2026-08-15T05:56:46.821Z",
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"dateUpdated": "2026-08-17T05:14:31.058Z"
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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": "2026-08-17T05:14:31.058Z"
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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\nalloc_tag: fix use-after-free in /proc/allocinfo after module unload\n\nallocinfo_start() only reinitializes the codetag iterator at position 0. \nFor subsequent reads (position > 0), it reuses cached iterator state from\nthe previous batch. allocinfo_stop() drops mod_lock between read batches,\nwhich allows module unload to complete and free the module memory that the\ncached iterator still references:\n\n CPU0 (read) CPU1 (rmmod)\n ---- ----\n allocinfo_start(pos=0)\n down_read(mod_lock)\n allocinfo_show()\n ...\n allocinfo_stop()\n up_read(mod_lock)\n codetag_unload_module()\n kfree(cmod)\n release_module_tags()\n ...\n free_mod_mem()\n allocinfo_start(pos=N)\n down_read(mod_lock)\n // reuses cached iter, skips re-init\n allocinfo_show()\n ct->filename <-- UAF\n\nAfter free_mod_mem() frees the module's .rodata, allocinfo_show()\ndereferences ct->filename, ct->function which point there.\n\nSave the iterator state in allocinfo_next() and resume from it in\nallocinfo_start() with codetag_next_ct(), which detects module removal via\nidr_find() returning NULL and skips to the next module."
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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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"lib/alloc_tag.c"
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],
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"versions": [
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{
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"version": "9f44df50fee4d2f6cb374177244ccfa9f0a5cc95",
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"lessThan": "37e3e8a2c3bfdd503209f043f8bbfbdcf5a1d92f",
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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": "9f44df50fee4d2f6cb374177244ccfa9f0a5cc95",
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"lessThan": "008ceffd44040f809aead6d7bef7cb1210c4149a",
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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": "9f44df50fee4d2f6cb374177244ccfa9f0a5cc95",
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"lessThan": "2956268efc457cb05d29c1bf94de1e8e684d7bbc",
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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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"lib/alloc_tag.c"
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],
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"versions": [
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{
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"version": "6.17",
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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": "6.17",
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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": "6.18.40",
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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": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "6.17",
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"versionEndExcluding": "6.18.40"
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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": "6.17",
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"versionEndExcluding": "7.1.5"
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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": "6.17",
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"versionEndExcluding": "7.2"
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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/37e3e8a2c3bfdd503209f043f8bbfbdcf5a1d92f"
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},
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{
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"url": "https://git.kernel.org/stable/c/008ceffd44040f809aead6d7bef7cb1210c4149a"
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},
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{
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"url": "https://git.kernel.org/stable/c/2956268efc457cb05d29c1bf94de1e8e684d7bbc"
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}
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],
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"title": "alloc_tag: fix use-after-free in /proc/allocinfo after module unload",
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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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} |