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CVE-2026-64226— sched_ext: Avoid UAF in scx_root_enable_workfn() init failure path

CVSS 7.8 · High EPSS 0.13% · P3

Affected Version Matrix 10

VendorProductVersion RangeStatus
LinuxLinuxf0e1a0643a59bf1f922fa209cec86a170b784f3f< cf396941901858b0de426cdcd3974eea6a02c98caffected
f0e1a0643a59bf1f922fa209cec86a170b784f3f< 45c7c4e3db8b700307313c035ea08be829a7f21baffected
f0e1a0643a59bf1f922fa209cec86a170b784f3f< 57e19ba3f58a67eb924022a5a60b67fd08e5cbbdaffected
f0e1a0643a59bf1f922fa209cec86a170b784f3f< 9a415cc53711f2238e0f0ca8a6bcc796c003b127affected
6.12affected
< 6.12unaffected
6.12.92≤ 6.12.*unaffected
6.18.34≤ 6.18.*unaffected
… +2 more rows
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I. Basic Information for CVE-2026-64226

Vulnerability Information
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Vulnerability Title
sched_ext: Avoid UAF in scx_root_enable_workfn() init failure path
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: sched_ext: Avoid UAF in scx_root_enable_workfn() init failure path In scx_root_enable_workfn(), put_task_struct(p) is called before scx_error() dereferences p->comm and p->pid. If the iterator's reference is the last drop, the task is freed synchronously and the deref becomes a UAF. Move put_task_struct() past scx_error().
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 6.12版本存在安全漏洞，该漏洞源于scx_root_enable_workfn()函数中put_task_struct(p)在scx_error()解引用p->comm和p->pid之前调用，导致释放后重用（UAF）。
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 ~ cf396941901858b0de426cdcd3974eea6a02c98c -
LinuxLinux 6.12 -

II. Public POCs for CVE-2026-64226

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III. Intelligence Information for CVE-2026-64226

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Patches & Fixes for CVE-2026-64226 (4)

Same Patch Batch · Linux · 2026-07-24 · 48 CVEs total

CVE-2026-642329.8 CRITICALblock: recompute nr_integrity_segments in blk_insert_cloned_request
CVE-2026-642169.8 CRITICALnetfs: Fix potential UAF in netfs_unlock_abandoned_read_pages()
CVE-2026-642558.8 HIGHwifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers
CVE-2026-642478.4 HIGHKVM: x86: hyper-v: Bound the bank index when querying sparse banks
CVE-2026-642358.1 HIGHx86/ftrace: Relocate %rip-relative percpu refs in dynamic trampolines
CVE-2026-642238.1 HIGHwifi: mac80211: consume only present negotiated TTLM maps
CVE-2026-642517.8 HIGHpwrseq: core: fix use-after-free in pwrseq_debugfs_seq_next()
CVE-2026-642217.8 HIGHspi: ti-qspi: fix use-after-free after DMA setup failure
CVE-2026-642187.8 HIGHbatman-adv: bla: fix report_work leak on backbone_gw purge
CVE-2026-642177.8 HIGHnetfs: Fix overrun check in netfs_extract_user_iter()
CVE-2026-642107.5 HIGHnet/mlx5e: xsk: Fix unlocked writing to ICOSQ
CVE-2026-642087.5 HIGHcrypto/krb5, rxrpc: Fix lack of pre-decrypt/pre-verify length checks
CVE-2026-642437.1 HIGHASoC: codecs: simple-mux: Fix enum control bounds check
CVE-2026-642227.0 HIGHocteontx2-pf: avoid double free of pool->stack on AQ init failure
CVE-2026-642197.0 HIGHdrm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_as
CVE-2026-64252MIPS: DEC: Prevent initial console buffer from landing in XKPHYS
CVE-2026-64246power: reset: linkstation-poweroff: fix use-after-free in the linkstation_poweroff_init()
CVE-2026-64250LoongArch: Report dying CPU to RCU in stop_this_cpu()
CVE-2026-64248MIPS: smp: report dying CPU to RCU in stop_this_cpu()
CVE-2026-64254NTB: epf: Avoid pci_iounmap() with offset when PEER_SPAD and CONFIG share BAR

Showing top 20 of 48 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64226

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