CVE-2026-53384
published 2026-07-19CVE-2026-53384: In the Linux kernel, the following vulnerability has been resolved: serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails dw8250_probe()…
PriorityP350critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.52%
42.3th percentile
In the Linux kernel, the following vulnerability has been resolved:
serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails
dw8250_probe() registers the 8250 port via serial8250_register_8250_port()
and then, if the device has a clock, registers a clock notifier. If
clk_notifier_register() fails, probe returns the error but leaves the
8250 port registered. The matching serial8250_unregister_port() lives
in dw8250_remove(), which is not called when probe fails, so the port
slot stays occupied until the device is rebound or the system is
rebooted. The devm-allocated driver data is freed while the port still
references it (via the saved private_data and serial_in/serial_out
callbacks), so any access to that port slot before a rebind is a
use-after-free hazard.
Unregister the port on the clk_notifier_register() error path.
Affected
33 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 57f83e5dd6a33c4696699954784f8fee789b1d0c < ccdf4510a3873b14e5e348cdb038717996f09fda | ccdf4510a3873b14e5e348cdb038717996f09fda |
| linux | linux | >= 57f83e5dd6a33c4696699954784f8fee789b1d0c < 511d2b92f8d20de04acafab676150d26fb5c67f4 | 511d2b92f8d20de04acafab676150d26fb5c67f4 |
| linux | linux | >= 57f83e5dd6a33c4696699954784f8fee789b1d0c < 07ffe414a708ae60551401cec5d727ed156b8caf | 07ffe414a708ae60551401cec5d727ed156b8caf |
| linux | linux | >= 57f83e5dd6a33c4696699954784f8fee789b1d0c < 3d205fe80f2181f0109150ad1fa06ee5bc046935 | 3d205fe80f2181f0109150ad1fa06ee5bc046935 |
| linux | linux | >= 57f83e5dd6a33c4696699954784f8fee789b1d0c < d72650a4f334581b23a1892b888a4cb1be142f76 | d72650a4f334581b23a1892b888a4cb1be142f76 |
| linux | linux | >= 57f83e5dd6a33c4696699954784f8fee789b1d0c < 778b9dda4b24005a27bcd9c35c110bf8d7f259ca | 778b9dda4b24005a27bcd9c35c110bf8d7f259ca |
| linux | linux | >= 57f83e5dd6a33c4696699954784f8fee789b1d0c < 10fc708b4de7f86002d2d735a2dbf3b5b7f65692 | 10fc708b4de7f86002d2d735a2dbf3b5b7f65692 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 5.19 < 6.1.177 | 6.1.177 |
| linux | linux_kernel | >= 6.13 < 6.18.38 | 6.18.38 |
| linux | linux_kernel | >= 6.19 < 7.0.14 | 7.0.14 |
| linux | linux_kernel | >= 6.2 < 6.6.144 | 6.6.144 |
| linux | linux_kernel | >= 6.7 < 6.12.95 | 6.12.95 |
| linux | linux_kernel | >= 7.1 < 7.1.2 | 7.1.2 |
| ubuntu | linux | — | — |
| ubuntu | linux-aws | — | — |
| ubuntu | linux-aws-7.0 | — | — |
| ubuntu | linux-azure | — | — |
| ubuntu | linux-azure-7.0 | — | — |
| ubuntu | linux-gcp | — | — |
| ubuntu | linux-gcp-7.0 | — | — |
| ubuntu | linux-gke | — | — |
| ubuntu | linux-hwe-7.0 | — | — |
| ubuntu | linux-ibm | — | — |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_redhat9.8CRITICAL
vendor_ubuntu9.1CRITICAL
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Title: Linux kernel (IBM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
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so had been revoked, bypassing memory protections or escalating privileges.
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This update corrects flaws in the following subsystems:
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- User-space API (UAPI);
- Kernel build system;
- ARM32 architecture;
- RISC-V architecture;
- S390 architec
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through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
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through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
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;
- User-space API (UAPI);
- Kernel build system;
- ARM32 architecture;
- RISC-V architecture;
- S390
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This update corrects flaws in the following subsystems:
- User-space API (UAPI);
- Kernel build system;
- ARM32 architecture;
- ARM64 architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- Compute Acceleration Framework;
- Intel NPU Driver;
- ACPI drivers;
- Android drivers;
- Drivers core;
- Compressed RAM block device driver;
- Bluetooth drivers;
- Character device driver;
- Hardware random number generator core;
- CPU frequency scaling framework;
- Hardware crypto device drivers;
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Title: Linux kernel (GCP) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
Several security issues were disc
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CVE-2026-64504 [CRITICAL] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
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;
- User-space API (UAPI);
- Kernel build system;
- ARM32 architecture;
- RISC-V architecture;
- S390 architecture;
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CVE-2026-63869 [CRITICAL] Linux kernel (OEM) vulnerabilities
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Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
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;
- User-space API (UAPI);
- Kernel build system;
- ARM32 architecture;
- RISC-V architecture;
- S390 architec
Red Hat
kernel: serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails
vendor_redhat·2026-07-19·CVSS 9.8
CVE-2026-53384 [CRITICAL] CWE-825 kernel: serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails
kernel: serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails
In the Linux kernel, the following vulnerability has been resolved:
serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails
dw8250_probe() registers the 8250 port via serial8250_register_8250_port()
and then, if the device has a clock, registers a clock notifier. If
clk_notifier_register() fails, probe returns the error but leaves the
8250 port registered. The matching serial8250_unregister_port() lives
in dw8250_remove(), which is not called when probe fails, so the port
slot stays occupied until the device is rebound or the system is
rebooted. The devm-allocated driver data is freed while the port still
references it (via the saved private_data and serial_in/serial_out
callbacks), so any access
VulDB
Linux Kernel up to 7.1.1 8250_dw 8250_dw.c dw8250_probe use after free (Nessus ID 330014 / WID-SEC-2026-2403)
vuldb·2026-08-06·CVSS 9.8
CVE-2026-53384 [CRITICAL] Linux Kernel up to 7.1.1 8250_dw 8250_dw.c dw8250_probe use after free (Nessus ID 330014 / WID-SEC-2026-2403)
A vulnerability, which was classified as very critical, has been found in Linux Kernel up to 7.1.1. Affected is the function dw8250_probe of the file drivers/tty/serial/8250/8250_dw.c of the component 8250_dw. Performing a manipulation results in use after free.
This vulnerability is known as CVE-2026-53384. Remote exploitation of the attack is possible. No exploit is available.
It is advisable to upgrade the affected component.
GHSA
In the Linux kernel, the following vulnerability has been resolved: serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails dw8250_probe() registers the 8250 port via serial8250_regis
ghsa_unreviewed·2026-07-19
CVE-2026-53384 [CRITICAL] In the Linux kernel, the following vulnerability has been resolved: serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails dw8250_probe() registers the 8250 port via serial8250_regis
In the Linux kernel, the following vulnerability has been resolved:
serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails
dw8250_probe() registers the 8250 port via serial8250_register_8250_port()
and then, if the device has a clock, registers a clock notifier. If
clk_notifier_register() fails, probe returns the error but leaves the
8250 port registered. The matching serial8250_unregister_port() lives
in dw8250_remove(), which is not called when probe fails, so the port
slot stays occupied until the device is rebound or the system is
rebooted. The devm-allocated driver data is freed while the port still
references it (via the saved private_data and serial_in/serial_out
callbacks), so any access to that port slot before a rebind is a
use-after-free hazard.
Unregister the
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/07ffe414a708ae60551401cec5d727ed156b8cafhttps://git.kernel.org/stable/c/10fc708b4de7f86002d2d735a2dbf3b5b7f65692https://git.kernel.org/stable/c/3d205fe80f2181f0109150ad1fa06ee5bc046935https://git.kernel.org/stable/c/511d2b92f8d20de04acafab676150d26fb5c67f4https://git.kernel.org/stable/c/778b9dda4b24005a27bcd9c35c110bf8d7f259cahttps://git.kernel.org/stable/c/ccdf4510a3873b14e5e348cdb038717996f09fdahttps://git.kernel.org/stable/c/d72650a4f334581b23a1892b888a4cb1be142f76
2026-07-19
Published