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CVE-2026-43482— sched_ext: Disable preemption between scx_claim_exit() and kicking helper work

AI Predicted 7.8 Difficulty: Hard EPSS 0.02% · P5

Affected Version Matrix 10

VendorProductVersion RangeStatus
LinuxLinuxf0e1a0643a59bf1f922fa209cec86a170b784f3f< 41423912f7ac7494ccd6eef411227b4efce740e0affected
f0e1a0643a59bf1f922fa209cec86a170b784f3f< 522acaae34aa7e05859260056b39c7c030592a0caffected
f0e1a0643a59bf1f922fa209cec86a170b784f3f< 5131dbec2c10961b34f844bc30b400c3fa0bcc72affected
f0e1a0643a59bf1f922fa209cec86a170b784f3f< 83236b2e43dba00bee5b82eb5758816b1a674f6aaffected
6.12affected
< 6.12unaffected
6.12.78≤ 6.12.*unaffected
6.18.20≤ 6.18.*unaffected
… +2 more rows
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I. Basic Information for CVE-2026-43482

Vulnerability Information
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Vulnerability Title
sched_ext: Disable preemption between scx_claim_exit() and kicking helper work
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: sched_ext: Disable preemption between scx_claim_exit() and kicking helper work scx_claim_exit() atomically sets exit_kind, which prevents scx_error() from triggering further error handling. After claiming exit, the caller must kick the helper kthread work which initiates bypass mode and teardown. If the calling task gets preempted between claiming exit and kicking the helper work, and the BPF scheduler fails to schedule it back (since error handling is now disabled), the helper work is never queued, bypass mode never activates, tasks stop being dispatched, and the system wedges. Disable preemption across scx_claim_exit() and the subsequent work kicking in all callers - scx_disable() and scx_vexit(). Add lockdep_assert_preemption_disabled() to scx_claim_exit() to enforce the requirement.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在scx_claim_exit和触发辅助工作之间未禁用抢占，可能导致系统挂起。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux f0e1a0643a59bf1f922fa209cec86a170b784f3f ~ 41423912f7ac7494ccd6eef411227b4efce740e0 -
LinuxLinux 6.12 -

II. Public POCs for CVE-2026-43482

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III. Intelligence Information for CVE-2026-43482

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Same Patch Batch · Linux · 2026-05-13 · 14 CVEs total

CVE-2026-43489liveupdate: luo_file: remember retrieve() status
CVE-2026-43487ata: libata-core: Disable LPM on ST1000DM010-2EP102
CVE-2026-43488usb: xhci: Prevent interrupt storm on host controller error (HCE)
CVE-2026-43485nouveau/gsp: drop WARN_ON in ACPI probes
CVE-2026-43486arm64: contpte: fix set_access_flags() no-op check for SMMU/ATS faults
CVE-2026-43484mmc: core: Avoid bitfield RMW for claim/retune flags
CVE-2026-43483KVM: SVM: Set/clear CR8 write interception when AVIC is (de)activated
CVE-2026-43480ASoC: amd: acp3x-rt5682-max9836: Add missing error check for clock acquisition
CVE-2026-43481net-shapers: don't free reply skb after genlmsg_reply()
CVE-2026-43479net: usb: lan78xx: fix WARN in __netif_napi_del_locked on disconnect
CVE-2026-43477drm/i915/vrr: Configure VRR timings after enabling TRANS_DDI_FUNC_CTL
CVE-2026-43478ASoC: codecs: rt1011: Use component to get the dapm context in spk_mode_put
CVE-2026-43476iio: chemical: sps30_i2c: fix buffer size in sps30_i2c_read_meas()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43482

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