CVE-2025-21836
published 2025-03-07CVE-2025-21836: In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: reallocate buf lists on upgrade IORING_REGISTER_PBUF_RING can reuse an old…
PriorityP418medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.25%
16.0th percentile
In the Linux kernel, the following vulnerability has been resolved:
io_uring/kbuf: reallocate buf lists on upgrade
IORING_REGISTER_PBUF_RING can reuse an old struct io_buffer_list if it
was created for legacy selected buffer and has been emptied. It violates
the requirement that most of the field should stay stable after publish.
Always reallocate it instead.
Affected
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.12.16-1 (forky) | linux 6.12.16-1 (forky) |
| chrome_chrome | — | — | |
| linux | linux | — | — |
| linux | linux | >= 2fcabce2d7d34f69a888146dab15b36a917f09d4 < 146a185f6c05ee263db715f860620606303c4633 | 146a185f6c05ee263db715f860620606303c4633 |
| linux | linux | >= 2fcabce2d7d34f69a888146dab15b36a917f09d4 < 7d0dc28dae836caf7645fef62a10befc624dd17b | 7d0dc28dae836caf7645fef62a10befc624dd17b |
| linux | linux | >= 2fcabce2d7d34f69a888146dab15b36a917f09d4 < 2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4 | 2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4 |
| linux | linux | >= 2fcabce2d7d34f69a888146dab15b36a917f09d4 < 8802766324e1f5d414a81ac43365c20142e85603 | 8802766324e1f5d414a81ac43365c20142e85603 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.12.16-1 | 6.12.16-1 |
| linux | linux_kernel | >= 0 < 6.12.16-1 | 6.12.16-1 |
| linux | linux_kernel | >= 0 < 6.8.0-78.78 | 6.8.0-78.78 |
| linux | linux_kernel | >= 5.19 < 6.6.79 | 6.6.79 |
| linux | linux_kernel | >= 6.13 < 6.13.4 | 6.13.4 |
| linux | linux_kernel | >= 6.7 < 6.12.16 | 6.12.16 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
vendor_ubuntu5.5MEDIUM
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This update corrects flaws in the following subsystems:
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Several security issues were discovered in the Linux kernel.
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This update corrects flaws in the following subsystems:
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- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Input Device (Mouse) drivers;
- Multiple devices driver;
- Media drivers;
- Network drivers;
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- SPI subsystem;
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- HID subsystem;
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- PowerPC architecture;
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- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Input Device (Mouse) drivers;
- Multiple devices driver;
- Media drivers;
- Network drivers;
- PCI subsystem;
- S/390 drivers;
- SPI subsystem;
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- 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;
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- 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;
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- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
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- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Hardware crypto device drivers;
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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
OSV
CVE-2025-21836: In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: reallocate buf lists on upgrade IORING_REGISTER_PBUF_RING can reuse
osv·2025-03-07·CVSS 5.5
CVE-2025-21836 [MEDIUM] CVE-2025-21836: In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: reallocate buf lists on upgrade IORING_REGISTER_PBUF_RING can reuse
In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: reallocate buf lists on upgrade IORING_REGISTER_PBUF_RING can reuse an old struct io_buffer_list if it was created for legacy selected buffer and has been emptied. It violates the requirement that most of the field should stay stable after publish. Always reallocate it instead.
GHSA
GHSA-wh23-v966-32jj: In the Linux kernel, the following vulnerability has been resolved:
io_uring/kbuf: reallocate buf lists on upgrade
IORING_REGISTER_PBUF_RING can reu
ghsa_unreviewed·2025-03-07
CVE-2025-21836 [MEDIUM] GHSA-wh23-v966-32jj: In the Linux kernel, the following vulnerability has been resolved:
io_uring/kbuf: reallocate buf lists on upgrade
IORING_REGISTER_PBUF_RING can reu
In the Linux kernel, the following vulnerability has been resolved:
io_uring/kbuf: reallocate buf lists on upgrade
IORING_REGISTER_PBUF_RING can reuse an old struct io_buffer_list if it
was created for legacy selected buffer and has been emptied. It violates
the requirement that most of the field should stay stable after publish.
Always reallocate it instead.
Chrome
Long Term Support Channel Update for ChromeOS: CVE-2025-13223
vendor_chrome·2025-11-21·CVSS 7.0
CVE-2025-13223 [HIGH] Long Term Support Channel Update for ChromeOS: CVE-2025-13223
Long Term Support Channel Update for ChromeOS
CVE-2025-13223: Type Confusion in V8. And also CVE-2025-21700, CVE-2025-21703, CVE-2025-21702, CVE-2025-21756, CVE-2025-21971, CVE-2025-21703, CVE-2025-21971, CVE-2025-37798, CVE-2025-37756, CVE-2025-37752, CVE-2025-21836, CVE-2024-27397 Release notes for LTS-138 can be found here Want to know more about Long-term Support? Click here Andy Wu Google Chrome OS
Severity: high
Chrome
Long Term Support Channel Update for ChromeOS: CVE-2025-21836
vendor_chrome·2025-10-10·CVSS 5.5
CVE-2025-21836 [MEDIUM] Long Term Support Channel Update for ChromeOS: CVE-2025-21836
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Ubuntu
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vendor_ubuntu·2025-09-03
CVE-2025-21741 Linux kernel (Azure) vulnerabilities
Title: Linux kernel (Azure) 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;
- 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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vendor_ubuntu·2025-08-28·CVSS 5.5
CVE-2025-21776 [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;
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vendor_ubuntu·2025-08-26·CVSS 5.5
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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:
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- 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;
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vendor_ubuntu·2025-08-21·CVSS 5.5
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;
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vendor_ubuntu·2025-08-20·CVSS 5.5
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;
-
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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;
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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/kbuf: re-using old struct io_buffer_list may lead to a use-after-free situation
vendor_redhat·2025-03-07·CVSS 5.5
CVE-2025-21836 [MEDIUM] CWE-416 kernel: io_uring/kbuf: re-using old struct io_buffer_list may lead to a use-after-free situation
kernel: io_uring/kbuf: re-using old struct io_buffer_list may lead to a use-after-free situation
In the Linux kernel, the following vulnerability has been resolved:
io_uring/kbuf: reallocate buf lists on upgrade
IORING_REGISTER_PBUF_RING can reuse an old struct io_buffer_list if it
was created for legacy selected buffer and has been emptied. It violates
the requirement that most of the field should stay stable after publish.
Always reallocate it instead.
Package: kernel (Red Hat Enterprise Linux 10) - Fix deferred
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 En
Debian
CVE-2025-21836: linux - In the Linux kernel, the following vulnerability has been resolved: io_uring/kb...
vendor_debian·2025·CVSS 5.5
CVE-2025-21836 [MEDIUM] CVE-2025-21836: linux - In the Linux kernel, the following vulnerability has been resolved: io_uring/kb...
In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: reallocate buf lists on upgrade IORING_REGISTER_PBUF_RING can reuse an old struct io_buffer_list if it was created for legacy selected buffer and has been emptied. It violates the requirement that most of the field should stay stable after publish. Always reallocate it instead.
Scope: local
bookworm: open
bullseye: resolved
forky: resolved (fixed in 6.12.16-1)
sid: resolved (fixed in 6.12.16-1)
trixie: resolved (fixed in 6.12.16-1)
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/146a185f6c05ee263db715f860620606303c4633https://git.kernel.org/stable/c/2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4https://git.kernel.org/stable/c/7d0dc28dae836caf7645fef62a10befc624dd17bhttps://git.kernel.org/stable/c/8802766324e1f5d414a81ac43365c20142e85603https://u1f383.github.io/slides/talks/2025_Hexacon-Deja_Vu_in_Linux_io_uring_Breaking_Memory_Sharing_Again_After_Generations_of_Fixes.pdf
2025-03-07
Published