164 lines
8.1 KiB
JSON
164 lines
8.1 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-2026-90193",
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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": "2026-09-11T19:38:34.792Z",
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"datePublished": "2026-09-17T16:07:13.672Z",
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"dateUpdated": "2026-10-19T08:59:29.783Z"
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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": "2026-10-19T08:59:29.783Z"
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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\nmailbox: qcom-cpucp: fix PREEMPT_RT self-deadlock in IRQ handler\n\nqcom_cpucp_mbox_irq_fn() calls mbox_chan_received_data() while holding\nchan->lock. Under PREEMPT_RT, spin_lock_irqsave() is converted to an\nrt_spinlock (rtmutex-based), which tracks ownership and can sleep.\n\nThe callback chain triggered by mbox_chan_received_data() eventually\nreaches mailbox_clear_channel() -> mbox_send_message() -> add_to_rbuf(),\nwhich attempts to re-acquire the same chan->lock. Since rtmutex detects\nthe re-entrant lock attempt by the same owner, the thread blocks waiting\nfor a lock it already holds, causing a permanent deadlock.\n\nThis deadlock manifests as 'irq/N-apss_cpucp_mbox' stuck in D state\nwith the following call trace:\n rt_spin_lock -> mbox_send_message -> mailbox_clear_channel ->\n scmi_rx_callback -> mbox_chan_received_data [<- held chan->lock here]\n\nFix by saving chan->cl locally and clearing the HW interrupt register\ninside the lock, then invoking mbox_chan_received_data() after releasing\nthe lock. This preserves the mutual exclusion for chan->cl access while\navoiding the lock re-entrancy that causes the PREEMPT_RT deadlock."
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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/mailbox/qcom-cpucp-mbox.c"
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],
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"versions": [
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{
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"version": "0e2a9a03106cd5fa0dbc9047675e7645c55e2669",
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"lessThan": "aa482273f32117c3adeba9b1cc945e0b5d33722d",
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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": "0e2a9a03106cd5fa0dbc9047675e7645c55e2669",
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"lessThan": "8b8de6400c86937ed57d680d06d716e167b381de",
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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": "0e2a9a03106cd5fa0dbc9047675e7645c55e2669",
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"lessThan": "e40b3edeaf25cd09e9c88edb1ef99373ca37593b",
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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": "0e2a9a03106cd5fa0dbc9047675e7645c55e2669",
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"lessThan": "3690aaa6d18f6775c3e7932fb8af8c5bf6a6b69c",
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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/mailbox/qcom-cpucp-mbox.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": "6.12.110",
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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": "6.18.52",
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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": "7.2.6",
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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": "6.11",
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"versionEndExcluding": "6.12.110"
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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": "6.18.52"
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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": "7.2.6"
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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": "7.3"
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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/aa482273f32117c3adeba9b1cc945e0b5d33722d"
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},
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{
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"url": "https://git.kernel.org/stable/c/8b8de6400c86937ed57d680d06d716e167b381de"
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},
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{
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"url": "https://git.kernel.org/stable/c/e40b3edeaf25cd09e9c88edb1ef99373ca37593b"
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},
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{
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"url": "https://git.kernel.org/stable/c/3690aaa6d18f6775c3e7932fb8af8c5bf6a6b69c"
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}
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],
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"title": "mailbox: qcom-cpucp: fix PREEMPT_RT self-deadlock in IRQ handler",
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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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} |