CVE-2023-53421
published 2025-09-18CVE-2023-53421: In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats() When blkg_alloc()…
PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.15%
4.7th percentile
In the Linux kernel, the following vulnerability has been resolved:
blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()
When blkg_alloc() is called to allocate a blkcg_gq structure
with the associated blkg_iostat_set's, there are 2 fields within
blkg_iostat_set that requires proper initialization - blkg & sync.
The former field was introduced by commit 3b8cc6298724 ("blk-cgroup:
Optimize blkcg_rstat_flush()") while the later one was introduced by
commit f73316482977 ("blk-cgroup: reimplement basic IO stats using
cgroup rstat").
Unfortunately those fields in the blkg_iostat_set's are not properly
re-initialized when they are cleared in v1's blkcg_reset_stats(). This
can lead to a kernel panic due to NULL pointer access of the blkg
pointer. The missing initialization of sync is less problematic and
can be a problem in a debug kernel due to missing lockdep initialization.
Fix these problems by re-initializing them after memory clearing.
Affected
36 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.162-1 (bookworm) | linux 6.1.162-1 (bookworm) |
| debian | linux-6.1 | < linux 6.1.162-1 (bookworm) | linux 6.1.162-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= f73316482977ac401ac37245c9df48079d4e11f3 < 58c135513562698f222a58ba07dbdfcfb268aa0d | 58c135513562698f222a58ba07dbdfcfb268aa0d |
| linux | linux | >= f73316482977ac401ac37245c9df48079d4e11f3 < 0561aa6033dd181594116d705c41fc16e97161a2 | 0561aa6033dd181594116d705c41fc16e97161a2 |
| linux | linux | >= f73316482977ac401ac37245c9df48079d4e11f3 < 892faa76be894d324bf48b12a55c7af7be2bad83 | 892faa76be894d324bf48b12a55c7af7be2bad83 |
| linux | linux | >= f73316482977ac401ac37245c9df48079d4e11f3 < b0d26283af612b9e0cc3188b0b88ad7fdea447e8 | b0d26283af612b9e0cc3188b0b88ad7fdea447e8 |
| linux | linux | >= f73316482977ac401ac37245c9df48079d4e11f3 < abbce7f82613ea5eeefd0fc3c1c8e449b9cef2a2 | abbce7f82613ea5eeefd0fc3c1c8e449b9cef2a2 |
| linux | linux | >= f73316482977ac401ac37245c9df48079d4e11f3 < 3d2af77e31ade05ff7ccc3658c3635ec1bea0979 | 3d2af77e31ade05ff7ccc3658c3635ec1bea0979 |
| linux | linux_kernel | >= 0 < 6.1.162-1 | 6.1.162-1 |
| linux | linux_kernel | >= 0 < 6.4.4-1 | 6.4.4-1 |
| linux | linux_kernel | >= 0 < 6.4.4-1 | 6.4.4-1 |
| linux | linux_kernel | >= 5.5 < 6.3.13 | 6.3.13 |
| linux | linux_kernel | >= 6.4 < 6.4.4 | 6.4.4 |
| 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 | — | — |
| ubuntu | linux-azure | — | — |
| ubuntu | linux-azure-5.15 | — | — |
| ubuntu | linux-azure-fips | — | — |
| ubuntu | linux-fips | — | — |
| ubuntu | linux-gcp-5.15 | — | — |
| ubuntu | linux-gcp-fips | — | — |
| ubuntu | linux-hwe-5.15 | — | — |
| ubuntu | linux-ibm | — | — |
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_ubuntu7.8HIGH
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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- IRQ chip drivers;
- Modular ISDN driver;
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- IIO ADC drivers;
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- IIO ADC drivers;
- IRQ chip drivers;
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- LED subsystem;
- UACCE accelerator framework;
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- DMA engine subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- UACCE accelerator framework;
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- STMicroelectronics network drivers;
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- Drivers core;
- Bluetooth drivers;
- DMA engine subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- UACCE accelerator framework;
- Ethernet bonding driver;
- Network drivers;
- STMicroelectronics network drivers;
- Ethernet team driver;
- NVME drivers;
- PHY drivers;
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- Block layer subsystem;
- Drivers core;
- Bluetooth drivers;
- DMA engine subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- UACCE accelerator framework;
- Ethernet bonding driver;
- Network drivers;
- STMicroelectronics network drivers;
- Ethernet team driver;
- NVME drivers;
- PHY drivers;
- SLIMbus drivers;
- W1 Dallas's 1-wire bus driver;
- Xen hypervisor drivers;
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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;
- Block layer subsystem;
- Drivers core;
- Bluetooth drivers;
- DMA engine subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- UACCE accelerator framework;
- Ethernet bonding driver;
- Network drivers;
- STMicroelectronics network drivers;
- Ethernet team driver;
- NVME drivers;
- PHY drivers;
- SLIMbus drivers;
- W1 Dallas's 1-wire bus driver;
- Xen hypervisor drivers;
- BTRFS file
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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;
- Block layer subsystem;
- Cryptographic API;
- Drivers core;
- Bluetooth drivers;
- DMA engine subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- UACCE accelerator framework;
- Ethernet bonding driver;
- Network drivers;
- STMicroelectronics network drivers;
- Ethernet team driver;
- NVME drivers;
- PHY drivers;
- SLIMbus drivers;
- W1 Dallas's 1-wire bus driver;
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Red Hat
kernel: blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()
vendor_redhat·2025-09-18·CVSS 5.5
CVE-2023-53421 [MEDIUM] CWE-476 kernel: blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()
kernel: blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()
In the Linux kernel, the following vulnerability has been resolved:
blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()
When blkg_alloc() is called to allocate a blkcg_gq structure
with the associated blkg_iostat_set's, there are 2 fields within
blkg_iostat_set that requires proper initialization - blkg & sync.
The former field was introduced by commit 3b8cc6298724 ("blk-cgroup:
Optimize blkcg_rstat_flush()") while the later one was introduced by
commit f73316482977 ("blk-cgroup: reimplement basic IO stats using
cgroup rstat").
Unfortunately those fields in the blkg_iostat_set's are not properly
re-initialized when they are cleared in v1's blkcg_reset_stats(). This
can lead to a kernel pa
Microsoft
blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()
vendor_msrc·2025-09-09·CVSS 5.5
CVE-2023-53421 [MEDIUM] CWE-476 blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()
blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()
Mariner: Mariner
Linux: Linux
Customer Action Required: Yes
Debian
CVE-2023-53421: linux - In the Linux kernel, the following vulnerability has been resolved: blk-cgroup:...
vendor_debian·2023·CVSS 5.5
CVE-2023-53421 [MEDIUM] CVE-2023-53421: linux - In the Linux kernel, the following vulnerability has been resolved: blk-cgroup:...
In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats() When blkg_alloc() is called to allocate a blkcg_gq structure with the associated blkg_iostat_set's, there are 2 fields within blkg_iostat_set that requires proper initialization - blkg & sync. The former field was introduced by commit 3b8cc6298724 ("blk-cgroup: Optimize blkcg_rstat_flush()") while the later one was introduced by commit f73316482977 ("blk-cgroup: reimplement basic IO stats using cgroup rstat"). Unfortunately those fields in the blkg_iostat_set's are not properly re-initialized when they are cleared in v1's blkcg_reset_stats(). This can lead to a kernel panic due to NULL pointer access of the blkg pointer. The missing initialization of
GHSA
GHSA-63xc-pmjj-q4vj: In the Linux kernel, the following vulnerability has been resolved:
blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()
When bl
ghsa_unreviewed·2025-09-18
CVE-2023-53421 [MEDIUM] CWE-476 GHSA-63xc-pmjj-q4vj: In the Linux kernel, the following vulnerability has been resolved:
blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()
When bl
In the Linux kernel, the following vulnerability has been resolved:
blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()
When blkg_alloc() is called to allocate a blkcg_gq structure
with the associated blkg_iostat_set's, there are 2 fields within
blkg_iostat_set that requires proper initialization - blkg & sync.
The former field was introduced by commit 3b8cc6298724 ("blk-cgroup:
Optimize blkcg_rstat_flush()") while the later one was introduced by
commit f73316482977 ("blk-cgroup: reimplement basic IO stats using
cgroup rstat").
Unfortunately those fields in the blkg_iostat_set's are not properly
re-initialized when they are cleared in v1's blkcg_reset_stats(). This
can lead to a kernel panic due to NULL pointer access of the blkg
pointer. The missing initialization
OSV
CVE-2023-53421: In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats() When blkg
osv·2025-09-18·CVSS 5.5
CVE-2023-53421 [MEDIUM] CVE-2023-53421: In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats() When blkg
In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats() When blkg_alloc() is called to allocate a blkcg_gq structure with the associated blkg_iostat_set's, there are 2 fields within blkg_iostat_set that requires proper initialization - blkg & sync. The former field was introduced by commit 3b8cc6298724 ("blk-cgroup: Optimize blkcg_rstat_flush()") while the later one was introduced by commit f73316482977 ("blk-cgroup: reimplement basic IO stats using cgroup rstat"). Unfortunately those fields in the blkg_iostat_set's are not properly re-initialized when they are cleared in v1's blkcg_reset_stats(). This can lead to a kernel panic due to NULL pointer access of the blkg pointer. The missing initialization of
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/0561aa6033dd181594116d705c41fc16e97161a2https://git.kernel.org/stable/c/3d2af77e31ade05ff7ccc3658c3635ec1bea0979https://git.kernel.org/stable/c/58c135513562698f222a58ba07dbdfcfb268aa0dhttps://git.kernel.org/stable/c/892faa76be894d324bf48b12a55c7af7be2bad83https://git.kernel.org/stable/c/abbce7f82613ea5eeefd0fc3c1c8e449b9cef2a2https://git.kernel.org/stable/c/b0d26283af612b9e0cc3188b0b88ad7fdea447e8
2025-09-18
Published