High severity · published Mar 12, 2025
CVE-2025-21863
io_uring: prevent opcode speculation
7.8
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
5.6 before 6.6.80; 6.7 before 6.12.17; 6.13 before 6.13.5; 6.14; 6.14; 6.14 · source: NVD
LI
Linux · Linux
d3656344fea0339fb0365c8df4d2beba4e0089cd before 87e9eef43c758da267f6332678058a79764c7eba; d3656344fea0339fb0365c8df4d2beba4e0089cd before 18eae8420081ef8e043ad455937bfb470ef08607; d3656344fea0339fb0365c8df4d2beba4e0089cd before d261ead565a080e3411b0dd04e6d58a52471cac8; d3656344fea0339fb0365c8df4d2beba4e0089cd before b9826e3b26ec031e9063f64a7c735449c43955e4; d3656344fea0339fb0365c8df4d2beba4e0089cd before 506b9b5e8c2d2a411ea8fe361333f5081c56d23a; d3656344fea0339fb0365c8df4d2beba4e0089cd before fdbfd52bd8b85ed6783365ff54c82ab7067bd61b; +2 more · source: vendor
SS
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.6; V3.1.7; V3.1.6; V3.1.7 · source: CISA
SS
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · Siemens
V3.1.6; V3.1.7; V3.1.6; V3.1.7 · source: CISA
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
0 · source: CISA
SS
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.6; V3.1.7 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-21863
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-21863
git.kernel.org
https://git.kernel.org/stable/c/18eae8420081ef8e043ad455937bfb470ef08607
Patch
https://git.kernel.org/stable/c/1e988c3fe1264708f4f92109203ac5b1d65de50b
Patch
https://git.kernel.org/stable/c/506b9b5e8c2d2a411ea8fe361333f5081c56d23a
git.kernel.org
https://git.kernel.org/stable/c/87e9eef43c758da267f6332678058a79764c7eba
Patch
https://git.kernel.org/stable/c/b9826e3b26ec031e9063f64a7c735449c43955e4
git.kernel.org
https://git.kernel.org/stable/c/d261ead565a080e3411b0dd04e6d58a52471cac8
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