372 lines
19 KiB
JSON
372 lines
19 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-2026-53242",
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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": "2026-06-09T07:44:35.393Z",
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"datePublished": "2026-06-25T08:39:37.129Z",
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"dateUpdated": "2026-10-19T19:57:31.043Z"
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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": "2026-09-02T12:49:37.764Z"
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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\nALSA: PCM: Fix wait queue list corruption in snd_pcm_drain() on linked streams\n\nsnd_pcm_drain() uses init_waitqueue_entry which does not clear\nentry.prev/next, and add_wait_queue with a conditional\nremove_wait_queue that is skipped when to_check is no longer\nin the group after concurrent UNLINK. The orphaned wait entry\nremains on the unlinked substream sleep queue. On the next\ndrain iteration, add_wait_queue adds the entry to a new queue\nwhile still linked on the old one, corrupting both lists. A\nsubsequent wake_up dereferences NULL at the func pointer\n(mapped from the spinlock at offset 0 of the misinterpreted\nwait_queue_head_t), causing a kernel panic.\n\nReplace init_waitqueue_entry/add_wait_queue/conditional\nremove_wait_queue with init_wait_entry/prepare_to_wait/\nfinish_wait. init_wait_entry clears prev/next via\nINIT_LIST_HEAD on each iteration and sets\nautoremove_wake_function which auto-removes the entry on\nwake-up. finish_wait safely handles both the already-removed\nand still-queued cases."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable code is reached from local userspace through ALSA PCM character-device ioctls such as SNDRV_PCM_IOCTL_LINK, SNDRV_PCM_IOCTL_UNLINK, and SNDRV_PCM_IOCTL_DRAIN. It is not reachable by remote network packets or adjacent/physical protocols.\nAC:L - The bug is a race, but the attacker can control both sides by using multiple PCM file descriptors/threads to link streams, block in drain, and concurrently unlink. No condition outside attacker control is required once suitable PCM devices are accessible.\nPR:L - No kernel capability check gates the vulnerable ioctl path, but the attacker needs local access to open ALSA PCM device nodes. That corresponds to a basic unprivileged local user with device access, not real root/admin privileges.\nUI:N - Exploitation is driven entirely by the attacker's own ioctl calls on opened PCM file descriptors. No victim user action is required.\nS:U - The vulnerability is in the kernel ALSA subsystem and affects kernel resources under the same security authority. It is not a VM escape, IOMMU bypass, or other cross-scope boundary violation.\nC:H - The documented failure is a panic, but the primitive is kernel wait-queue list corruption with an orphaned stack wait entry and cross-queue linkage under attacker-controlled timing. Under the higher-severity rule, this memory corruption is treated as potentially usable for kernel memory disclosure.\nI:H - The bug corrupts kernel wait-queue list pointers and can leave stale wait entries reachable by later wakeups. Although the observed path dereferences a NULL function pointer, this is kernel memory corruption plausibly usable for control-flow or privilege-impacting writes, so integrity is High.\nA:H - A subsequent wake_up can dereference a NULL/misinterpreted wait-queue function pointer and panic the kernel. This is a reliable high availability impact."
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}
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]
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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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"sound/core/pcm_native.c"
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],
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"status": "unaffected",
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"status": "unaffected",
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{
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},
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{
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{
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"url": "https://git.kernel.org/stable/c/b053fcd8912f06c30f932f5b8ec41c72de474695"
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{
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"url": "https://git.kernel.org/stable/c/cd98837db15f323463b8df07282ac723bd5c3fed"
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"url": "https://git.kernel.org/stable/c/88fe2e3658726cb21ff2dcf9770bf672f9b9d31b"
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}
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],
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"title": "ALSA: PCM: Fix wait queue list corruption in snd_pcm_drain() on linked streams",
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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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"adp": [
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{
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"x_adpType": "supplier",
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"providerMetadata": {
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"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
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"shortName": "siemens-SADP",
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"dateUpdated": "2026-10-15T01:22:56.393Z"
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},
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"affected": [
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
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"versions": [
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{
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"status": "affected",
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"references": [
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{
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"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
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}
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},
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-53242",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:27:33.806923Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-362",
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"description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-19T19:57:31.043Z"
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}
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}
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]
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}
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} |