CVE-2025-21863
published 2025-03-12CVE-2025-21863: 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…
PriorityP336high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.22%
13.1th percentile
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.
Affected
49 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.12.17-1 (forky) | linux 6.12.17-1 (forky) |
| lfprojects | valkey | >= 0 < 7.2.12+dfsg1-0ubuntu0.1 | 7.2.12+dfsg1-0ubuntu0.1 |
| lfprojects | valkey | >= 0 < 8.1.6+dfsg1-0ubuntu0.1 | 8.1.6+dfsg1-0ubuntu0.1 |
| linux | linux | — | — |
| linux | linux | >= d3656344fea0339fb0365c8df4d2beba4e0089cd < 87e9eef43c758da267f6332678058a79764c7eba | 87e9eef43c758da267f6332678058a79764c7eba |
| linux | linux | >= d3656344fea0339fb0365c8df4d2beba4e0089cd < 18eae8420081ef8e043ad455937bfb470ef08607 | 18eae8420081ef8e043ad455937bfb470ef08607 |
| linux | linux | >= d3656344fea0339fb0365c8df4d2beba4e0089cd < d261ead565a080e3411b0dd04e6d58a52471cac8 | d261ead565a080e3411b0dd04e6d58a52471cac8 |
| linux | linux | >= d3656344fea0339fb0365c8df4d2beba4e0089cd < b9826e3b26ec031e9063f64a7c735449c43955e4 | b9826e3b26ec031e9063f64a7c735449c43955e4 |
| linux | linux | >= d3656344fea0339fb0365c8df4d2beba4e0089cd < 506b9b5e8c2d2a411ea8fe361333f5081c56d23a | 506b9b5e8c2d2a411ea8fe361333f5081c56d23a |
| linux | linux | >= d3656344fea0339fb0365c8df4d2beba4e0089cd < fdbfd52bd8b85ed6783365ff54c82ab7067bd61b | fdbfd52bd8b85ed6783365ff54c82ab7067bd61b |
| linux | linux | >= d3656344fea0339fb0365c8df4d2beba4e0089cd < 1e988c3fe1264708f4f92109203ac5b1d65de50b | 1e988c3fe1264708f4f92109203ac5b1d65de50b |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.12.17-1 | 6.12.17-1 |
| linux | linux_kernel | >= 0 < 6.12.17-1 | 6.12.17-1 |
| linux | linux_kernel | >= 0 < 6.8.0-78.78 | 6.8.0-78.78 |
| linux | linux_kernel | >= 5.6 < 6.6.80 | 6.6.80 |
| linux | linux_kernel | >= 6.13 < 6.13.5 | 6.13.5 |
| linux | linux_kernel | >= 6.7 < 6.12.17 | 6.12.17 |
| msrc | azl3_kernel_6.6.78.1-3_on_azure_linux_3.0 | — | — |
| msrc | azl3_kernel_6.6.82.1-1_on_azure_linux_3.0 | — | — |
| msrc | cbl2_kernel_5.15.186.1-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_kernel_5.15.200.1-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_kernel_5.15.202.1-1_on_cbl_mariner_2.0 | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_msrc7.8HIGH
vendor_redhat7.8HIGH
vendor_ubuntu7.1HIGH
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- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
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CVE-2025-21863: In the Linux kernel, the following vulnerability has been resolved: io_uring: prevent opcode speculation sqe->opcode is used for different tables, mak
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CVE-2025-21863 [HIGH] CVE-2025-21863: In the Linux kernel, the following vulnerability has been resolved: io_uring: prevent opcode speculation sqe->opcode is used for different tables, mak
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.
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GHSA-qj2f-x8m5-rrr3: In the Linux kernel, the following vulnerability has been resolved:
io_uring: prevent opcode speculation
sqe->opcode is used for different tables, m
ghsa_unreviewed·2025-03-12
CVE-2025-21863 [HIGH] GHSA-qj2f-x8m5-rrr3: In the Linux kernel, the following vulnerability has been resolved:
io_uring: prevent opcode speculation
sqe->opcode is used for different tables, m
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.
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Maxim Suhanov discovered that the NTFS file system implementation in the
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expose sensitive information (kernel memory). (CVE-2023-45896)
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situations, leading to an out-of-bounds read. An attacker could use this to
construct a malicious NTFS image that, when mounted and operated on, could
expose sensitive information (kernel memory). (CVE-2023-45896)
It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
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Linux kernel did not properly validate file name length in certain
situations, leading to an out-of-bounds read. An attacker could use this to
construct a malicious NTFS image that, when mounted and operated on, could
expose sensitive information (kernel memory). (CVE-2023-45896)
It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation
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Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Maxim Suhanov discovered that the NTFS file system implementation in the
Linux kernel did not properly validate file name length in certain
situations, leading to an out-of-bounds read. An attacker could use this to
construct a malicious NTFS image that, when mounted and operated on, could
expose sensitive information (kernel memory). (CVE-2023-45896)
It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local
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Maxim Suhanov discovered that the NTFS file system implementation in the
Linux kernel did not properly validate file name length in certain
situations, leading to an out-of-bounds read. An attacker could use this to
construct a malicious NTFS image that, when mounted and operated on, could
expose sensitive information (kernel memory). (CVE-2023-45896)
It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation
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Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- S390 architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- FireWire subsystem;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I3C subsystem;
- InfiniBand drivers;
- Input Device (Mouse) drivers;
- IOMMU subsystem;
- Multiple devices driver;
- Media drivers;
- NVIDIA Tegra memory cont
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Summary: Several security issues were fixed in the Linux kernel.
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Input Device (Mouse) drivers;
- Multiple devices driver;
- Media drivers;
- Network drivers;
- PCI subsystem;
- S/390 drivers;
- SPI subsystem;
- Trusted Execution Environment drivers;
- UFS subsystem;
- USB Device Class drivers;
- USB core drivers;
- USB Gadget drivers;
- Framebuffer layer;
- Network file system (NFS) client;
- Network file system (NFS) server daemon;
-
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Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Input Device (Mouse) drivers;
- Multiple devices driver;
- Media drivers;
- Network drivers;
- PCI subsystem;
- S/390 drivers;
- SPI subsystem;
- Trusted Execution Environment drivers;
- UFS subsystem;
- USB Device Class drivers;
- USB core drivers;
- USB Gadget drivers;
- Framebuffer layer;
- Network file system (NFS) client;
- Network file syste
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CVE-2025-21746 [MEDIUM] Linux kernel (Oracle) vulnerabilities
Title: Linux kernel (Oracle) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Input Device (Mouse) drivers;
- Multiple devices driver;
- Media drivers;
- Network drivers;
- PCI subsystem;
- S/390 drivers;
- SPI subsystem;
- Trusted Execution Environment drivers;
- UFS subsystem;
- USB Device Class drivers;
- USB core drivers;
- USB Gadget drivers;
- Framebuffer layer;
- Network file system (NFS) client;
- Network file system (NFS) server d
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CVE-2025-21855 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Input Device (Mouse) drivers;
- Multiple devices driver;
- Media drivers;
- Network drivers;
- PCI subsystem;
- S/390 drivers;
- SPI subsystem;
- Trusted Execution Environment drivers;
- UFS subsystem;
- USB Device Class drivers;
- USB core drivers;
- USB Gadget drivers;
- Framebuffer layer;
- Network file system (NFS) client;
- Network file system (NFS) server daemon;
-
Ubuntu
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vendor_ubuntu·2025-08-19·CVSS 5.5
CVE-2025-21859 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Input Device (Mouse) drivers;
- Multiple devices driver;
- Media drivers;
- Network drivers;
- PCI subsystem;
- S/390 drivers;
- SPI subsystem;
- Trusted Execution Environment drivers;
- UFS subsystem;
- USB Device Class drivers;
- USB core drivers;
- USB Gadget drivers;
- Framebuffer layer;
- Network file system (NFS) client;
- Network file system (NFS) server daemon;
-
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2025-05-28
CVE-2024-57977 Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Bluetooth drivers;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Hardware crypto device drivers;
- FireWire subsystem;
- EFI core;
- Qualcomm firmware drivers;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- I3C subsystem;
- InfiniBand drivers;
- Input Device (Mouse) drivers;
- IOM
Ubuntu
Linux kernel (AWS) vulnerabilities
vendor_ubuntu·2025-05-22
CVE-2025-21716 Linux kernel (AWS) vulnerabilities
Title: Linux kernel (AWS) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Bluetooth drivers;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Hardware crypto device drivers;
- FireWire subsystem;
- EFI core;
- Qualcomm firmware drivers;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- I3C subsystem;
- InfiniBand drivers;
- Input Device (Mouse) drivers;
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2025-05-20
CVE-2025-21716 Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Bluetooth drivers;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Hardware crypto device drivers;
- FireWire subsystem;
- EFI core;
- Qualcomm firmware drivers;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- I3C subsystem;
- InfiniBand drivers;
- Input Device (Mouse) drivers;
- IOM
Red Hat
kernel: io_uring: prevent opcode speculation
vendor_redhat·2025-03-12·CVSS 7.8
CVE-2025-21863 [HIGH] CWE-99 kernel: io_uring: prevent opcode speculation
kernel: io_uring: prevent opcode speculation
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.
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Not affected
Package: kernel (Red Hat Enterprise Linux 8) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 8) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 9) - Affected
Microsoft
io_uring: prevent opcode speculation
vendor_msrc·2025-03-11·CVSS 7.8
CVE-2025-21863 [HIGH] io_uring: prevent opcode speculation
io_uring: prevent opcode speculation
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
Linux: Linux
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.microsoft.com/en-u
Debian
CVE-2025-21863: linux - In the Linux kernel, the following vulnerability has been resolved: io_uring: p...
vendor_debian·2025·CVSS 7.8
CVE-2025-21863 [HIGH] CVE-2025-21863: linux - In the Linux kernel, the following vulnerability has been resolved: io_uring: p...
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.
Scope: local
bookworm: open
bullseye: open
forky: resolved (fixed in 6.12.17-1)
sid: resolved (fixed in 6.12.17-1)
trixie: resolved (fixed in 6.12.17-1)
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/18eae8420081ef8e043ad455937bfb470ef08607https://git.kernel.org/stable/c/1e988c3fe1264708f4f92109203ac5b1d65de50bhttps://git.kernel.org/stable/c/506b9b5e8c2d2a411ea8fe361333f5081c56d23ahttps://git.kernel.org/stable/c/87e9eef43c758da267f6332678058a79764c7ebahttps://git.kernel.org/stable/c/b9826e3b26ec031e9063f64a7c735449c43955e4https://git.kernel.org/stable/c/d261ead565a080e3411b0dd04e6d58a52471cac8https://git.kernel.org/stable/c/fdbfd52bd8b85ed6783365ff54c82ab7067bd61b
2025-03-12
Published