| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Fix incorrect autogroup migration detection\n\nscx_move_task() is called from sched_move_task() and tells the BPF scheduler\nthat cgroup migration is being committed. sched_move_task() is used by both\ncgroup and autogroup migrations and scx_move_task() tried to filter out\nautogroup migrations by testing the destination cgroup and PF_EXITING but\nthis is not enough. In fact, without explicitly tagging the thread which is\ndoing the cgroup migration, there is no good way to tell apart\nscx_move_task() invocations for racing migration to the root cgroup and an\nautogroup migration.\n\nThis led to scx_move_task() incorrectly ignoring a migration from non-root\ncgroup to an autogroup of the root cgroup triggering the following warning:\n\n WARNING: CPU: 7 PID: 1 at kernel/sched/ext.c:3725 scx_cgroup_can_attach+0x196/0x340\n ...\n Call Trace:\n <TASK>\n cgroup_migrate_execute+0x5b1/0x700\n cgroup_attach_task+0x296/0x400\n __cgroup_procs_write+0x128/0x140\n cgroup_procs_write+0x17/0x30\n kernfs_fop_write_iter+0x141/0x1f0\n vfs_write+0x31d/0x4a0\n __x64_sys_write+0x72/0xf0\n do_syscall_64+0x82/0x160\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nFix it by adding an argument to sched_move_task() that indicates whether the\nmoving is for a cgroup or autogroup migration. After the change,\nscx_move_task() is called only for cgroup migrations and renamed to\nscx_cgroup_move_task()." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "kernel/sched/autogroup.c", |
| "kernel/sched/core.c", |
| "kernel/sched/ext.c", |
| "kernel/sched/ext.h", |
| "kernel/sched/sched.h" |
| ], |
| "versions": [ |
| { |
| "version": "8195136669661fdfe54e9a8923c33b31c92fc1da", |
| "lessThan": "75bf2f80c046d2ec5a07455891ea0a9fb6d8b5f6", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "8195136669661fdfe54e9a8923c33b31c92fc1da", |
| "lessThan": "d8b510d0ddc65d8a71e0f9a3acc9ed5f010fc514", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "8195136669661fdfe54e9a8923c33b31c92fc1da", |
| "lessThan": "d6f3e7d564b2309e1f17e709a70eca78d7ca2bb8", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "kernel/sched/autogroup.c", |
| "kernel/sched/core.c", |
| "kernel/sched/ext.c", |
| "kernel/sched/ext.h", |
| "kernel/sched/sched.h" |
| ], |
| "versions": [ |
| { |
| "version": "6.12", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "6.12", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12.16", |
| "lessThanOrEqual": "6.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.13.4", |
| "lessThanOrEqual": "6.13.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.14", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.12", |
| "versionEndExcluding": "6.12.16" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.12", |
| "versionEndExcluding": "6.13.4" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.12", |
| "versionEndExcluding": "6.14" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/75bf2f80c046d2ec5a07455891ea0a9fb6d8b5f6" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/d8b510d0ddc65d8a71e0f9a3acc9ed5f010fc514" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/d6f3e7d564b2309e1f17e709a70eca78d7ca2bb8" |
| } |
| ], |
| "title": "sched_ext: Fix incorrect autogroup migration detection", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2025-21771", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
