164 lines
8.7 KiB
JSON
164 lines
8.7 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-2026-80563",
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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": "2026-08-26T14:34:25.767Z",
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"datePublished": "2026-08-26T14:37:27.759Z",
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"dateUpdated": "2026-08-26T14:37:27.759Z"
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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": "2026-08-26T14:37:27.759Z"
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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\ngpio: sloppy-logic-analyzer: fix use-after-free via debugfs trigger on unbind\n\nThe \"trigger\" debugfs file has a hand-rolled ->write handler\n(trigger_write()) that dereferences the per-device gpio_la_poll_priv. The\nfile is created with debugfs_create_file_unsafe(), and the handler never\ntakes a debugfs reference. Nothing keeps the object alive while the\nhandler runs.\n\npriv is allocated with devm_kzalloc(). devres frees it when the platform\ndevice is unbound. debugfs_create_file_unsafe() installs no full_proxy\nwrapper, so debugfs_remove_recursive() in gpio_la_poll_remove() does not\nwait for an in-flight trigger_write(). The blob_lock taken there does not\nhelp, because trigger_write() never takes it. A write that races an unbind\ntherefore writes into freed memory:\n\n trigger_write() gpio_la_poll_remove()\n priv = m->private\n buf = memdup_user() [may sleep]\n mutex_lock(&priv->blob_lock)\n debugfs_remove_recursive() [no wait]\n mutex_unlock(&priv->blob_lock)\n (remove returns; devres frees priv)\n priv->trig_data = buf <-- use-after-free write\n priv->trig_len = count\n\nThe race is reachable by root via\n/sys/bus/platform/drivers/gpio-sloppy-logic-analyzer/unbind.\n\nCreate \"trigger\" with debugfs_create_file() instead. Its full_proxy\nwrapper makes debugfs_remove_recursive() drain any in-flight ->write\nbefore it returns.\n\nThe use-after-free is confirmed under KASAN with a minimal reproducer of\nthe same debugfs_create_file_unsafe() plus devm_kzalloc() pattern\n(available on request); it produces a slab-use-after-free write in the\nhandler."
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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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"drivers/gpio/gpio-sloppy-logic-analyzer.c"
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],
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"versions": [
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{
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"version": "7828b7bbbf2074dd7dd14d87f50bc5ce9036d692",
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"lessThan": "49a1ebb1ef2c8ada300c174b65273810abb4e326",
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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": "7828b7bbbf2074dd7dd14d87f50bc5ce9036d692",
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"lessThan": "23e9f32c0c7d2043e39655cff5ee3ddf29a43f80",
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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": "7828b7bbbf2074dd7dd14d87f50bc5ce9036d692",
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"lessThan": "24bef4918f6ab806260476e2f93d8f791fd17449",
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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": "7828b7bbbf2074dd7dd14d87f50bc5ce9036d692",
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"lessThan": "44f3468a0aef1aabdad551898ab7cfa2a9d20e99",
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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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"drivers/gpio/gpio-sloppy-logic-analyzer.c"
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],
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"versions": [
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{
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"version": "6.11",
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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": "6.11",
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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": "6.12.105",
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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": "6.18.46",
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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": "7.1.10",
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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": "6.11",
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"versionEndExcluding": "6.12.105"
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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": "6.11",
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"versionEndExcluding": "6.18.46"
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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": "6.11",
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"versionEndExcluding": "7.1.10"
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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": "6.11",
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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/49a1ebb1ef2c8ada300c174b65273810abb4e326"
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},
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{
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"url": "https://git.kernel.org/stable/c/23e9f32c0c7d2043e39655cff5ee3ddf29a43f80"
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},
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{
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"url": "https://git.kernel.org/stable/c/24bef4918f6ab806260476e2f93d8f791fd17449"
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},
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{
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"url": "https://git.kernel.org/stable/c/44f3468a0aef1aabdad551898ab7cfa2a9d20e99"
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}
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],
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"title": "gpio: sloppy-logic-analyzer: fix use-after-free via debugfs trigger on unbind",
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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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} |