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CVE-2025-21863— io_uring: prevent opcode speculation

EPSS 0.01% · P3

Affected Version Matrix 10

VendorProductVersion RangeStatus
LinuxLinuxd3656344fea0339fb0365c8df4d2beba4e0089cd< b9826e3b26ec031e9063f64a7c735449c43955e4affected
d3656344fea0339fb0365c8df4d2beba4e0089cd< 506b9b5e8c2d2a411ea8fe361333f5081c56d23aaffected
d3656344fea0339fb0365c8df4d2beba4e0089cd< fdbfd52bd8b85ed6783365ff54c82ab7067bd61baffected
d3656344fea0339fb0365c8df4d2beba4e0089cd< 1e988c3fe1264708f4f92109203ac5b1d65de50baffected
5.6affected
< 5.6unaffected
6.6.80≤ 6.6.*unaffected
6.12.17≤ 6.12.*unaffected
… +2 more rows
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I. Basic Information for CVE-2025-21863

Vulnerability Information
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Vulnerability Title
io_uring: prevent opcode speculation
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: io_uring: prevent opcode speculation sqe->opcode is used for different tables, make sure we santitise it against speculations.
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，该漏洞源于未对操作码进行清理，可能导致推测执行攻击。
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 d3656344fea0339fb0365c8df4d2beba4e0089cd ~ b9826e3b26ec031e9063f64a7c735449c43955e4 -
LinuxLinux 5.6 -

II. Public POCs for CVE-2025-21863

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III. Intelligence Information for CVE-2025-21863

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Same Patch Batch · Linux · 2025-03-12 · 26 CVEs total

CVE-2025-21853bpf: avoid holding freeze_mutex during mmap operation
CVE-2024-58087ksmbd: fix racy issue from session lookup and expire
CVE-2024-58088bpf: Fix deadlock when freeing cgroup storage
CVE-2024-58089btrfs: fix double accounting race when btrfs_run_delalloc_range() failed
CVE-2025-21844smb: client: Add check for next_buffer in receive_encrypted_standard()
CVE-2025-21845mtd: spi-nor: sst: Fix SST write failure
CVE-2025-21846acct: perform last write from workqueue
CVE-2025-21848nfp: bpf: Add check for nfp_app_ctrl_msg_alloc()
CVE-2025-21847ASoC: SOF: stream-ipc: Check for cstream nullity in sof_ipc_msg_data()
CVE-2025-21849drm/i915/gt: Use spin_lock_irqsave() in interruptible context
CVE-2025-21851bpf: Fix softlockup in arena_map_free on 64k page kernel
CVE-2025-21850nvmet: Fix crash when a namespace is disabled
CVE-2025-21852net: Add rx_skb of kfree_skb to raw_tp_null_args[].
CVE-2025-21866powerpc/code-patching: Fix KASAN hit by not flagging text patching area as VM_ALLOC
CVE-2025-21855ibmvnic: Don't reference skb after sending to VIOS
CVE-2025-21854sockmap, vsock: For connectible sockets allow only connected
CVE-2025-21856s390/ism: add release function for struct device
CVE-2025-21857net/sched: cls_api: fix error handling causing NULL dereference
CVE-2025-21858geneve: Fix use-after-free in geneve_find_dev().
CVE-2025-21859USB: gadget: f_midi: f_midi_complete to call queue_work

Showing top 20 of 26 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21863

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