122 lines
6.4 KiB
JSON
122 lines
6.4 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-2026-68094",
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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": "2026-07-30T09:28:09.367Z",
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"datePublished": "2026-08-10T11:58:07.086Z",
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"dateUpdated": "2026-08-17T04:58:42.583Z"
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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": "2026-08-17T04:58:42.583Z"
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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\nsched_ext: Preserve rq tracking across local DSQ dispatch\n\ndispatch_to_local_dsq() can run from scx_bpf_dsq_move_to_local() while\nops.dispatch() has recorded the current rq. Moving a task to a local DSQ\nmay switch to the source or destination rq before synchronously invoking\nops.dequeue() through the following path:\n\n SCX_CALL_OP(dispatch, rq)\n ops.dispatch()\n scx_bpf_dsq_move_to_local()\n scx_flush_dispatch_buf()\n finish_dispatch()\n dispatch_to_local_dsq()\n scx_dispatch_enqueue()\n local_dsq_post_enq()\n call_task_dequeue()\n SCX_CALL_OP_TASK(dequeue, locked_rq, ...)\n\nThe nested callback saves the recorded rq and restores it on return. If\nthe rq tracking does not follow the lock switch, update_locked_rq() can\ntrigger the following lockdep assertion while restoring an rq which is\nno longer held:\n\n WARNING: kernel/sched/sched.h:1641 at call_task_dequeue+0x160/0x170\n Call Trace:\n scx_dispatch_enqueue+0x2b0/0x460\n dispatch_to_local_dsq+0x138/0x230\n scx_flush_dispatch_buf+0x1af/0x220\n scx_bpf_dsq_move_to_local___v2+0xe2/0x1c0\n bpf__sched_ext_ops_dispatch+0x4b/0xa7\n do_pick_task_scx+0x3b6/0x910\n __pick_next_task+0x105/0x1f0\n __schedule+0x3e7/0x1980\n\nIntroduce switch_rq_lock() to update the tracking state together with\neach rq lock handoff. Use it in dispatch_to_local_dsq(),\nmove_remote_task_to_local_dsq() and the in-balance paths of\nscx_dsq_move(), ensuring that scx_locked_rq() consistently refers to the\nrq whose lock is actually held throughout the lock dance."
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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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"kernel/sched/ext/ext.c"
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],
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"versions": [
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{
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"version": "7fb39e4eb4c3db52e4707a6a1cd45362f7e803f5",
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"lessThan": "97c09c9f5739b8757ee29dabb0af30069137e286",
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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": "7fb39e4eb4c3db52e4707a6a1cd45362f7e803f5",
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"lessThan": "18d62044cda7a2b40f59d910659c0b0d6accad37",
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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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"kernel/sched/ext/ext.c"
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],
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"versions": [
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{
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"version": "7.1",
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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": "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": "7.1.6",
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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": "7.1",
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"versionEndExcluding": "7.1.6"
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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": "7.1",
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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/97c09c9f5739b8757ee29dabb0af30069137e286"
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},
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{
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"url": "https://git.kernel.org/stable/c/18d62044cda7a2b40f59d910659c0b0d6accad37"
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}
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],
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"title": "sched_ext: Preserve rq tracking across local DSQ dispatch",
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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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} |