CVE-2024-43855
published 2024-08-17CVE-2024-43855: In the Linux kernel, the following vulnerability has been resolved: md: fix deadlock between mddev_suspend and flush bio Deadlock occurs when mddev is being…
PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.21%
11.1th percentile
In the Linux kernel, the following vulnerability has been resolved:
md: fix deadlock between mddev_suspend and flush bio
Deadlock occurs when mddev is being suspended while some flush bio is in
progress. It is a complex issue.
T1. the first flush is at the ending stage, it clears 'mddev->flush_bio'
and tries to submit data, but is blocked because mddev is suspended
by T4.
T2. the second flush sets 'mddev->flush_bio', and attempts to queue
md_submit_flush_data(), which is already running (T1) and won't
execute again if on the same CPU as T1.
T3. the third flush inc active_io and tries to flush, but is blocked because
'mddev->flush_bio' is not NULL (set by T2).
T4. mddev_suspend() is called and waits for active_io dec to 0 which is inc
by T3.
T1 T2 T3 T4
(flush 1) (flush 2) (third 3) (suspend)
md_submit_flush_data
mddev->flush_bio = NULL;
.
. md_flush_request
. mddev->flush_bio = bio
. queue submit_flushes
. .
. . md_handle_request
. . active_io + 1
. . md_flush_request
. . wait !mddev->flush_bio
. .
. . mddev_suspend
. . wait !active_io
. .
. submit_flushes
. queue_work md_submit_flush_data
. //md_submit_flush_data is already running (T1)
.
md_handle_request
wait resume
The root issue is non-atomic inc/dec of active_io during flush process.
active_io is dec before md_submit_flush_data is queued, and inc soon
after md_submit_flush_data() run.
md_flush_request
active_io + 1
submit_flushes
active_io - 1
md_submit_flush_data
md_handle_request
active_io + 1
make_request
active_io - 1
If active_io is dec after md_handle_request() instead of within
submit_flushes(), make_request() can be called directly intead of
md_handle_request() in md_submit_flush_data(), and active_io will
only inc and dec once in the whole flush process. Deadlock will be
fixed.
Additionally, the only difference between fixing the issue and before is
that there is no return error handling of make_request(). But after
previous patch cleaned md_write_start(), make_requst() only return error
in rai
Affected
26 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.106-1 (bookworm) | linux 6.1.106-1 (bookworm) |
| debian | linux-6.1 | < linux 6.1.106-1 (bookworm) | linux 6.1.106-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | >= 530cec617f5a8ba6f26bcbf0d64d75c951d17730 < 2d0738a8322bf4e5bfe693d16b3111928a9ccfbf | 2d0738a8322bf4e5bfe693d16b3111928a9ccfbf |
| linux | linux | >= 6.1.75 < 6.1.103 | 6.1.103 |
| linux | linux | >= 6.6.14 < 6.6.44 | 6.6.44 |
| linux | linux | >= 6.7.2 < 6.8 | 6.8 |
| linux | linux | >= f9f2d957a8ea93c73182aebf7de30935a58c027d < 32226070813140234b6c507084738e8e8385c5c6 | 32226070813140234b6c507084738e8e8385c5c6 |
| linux | linux | >= fa2bbff7b0b4e211fec5e5686ef96350690597b5 < ca963eefbc3331222b6121baa696d49ba2008811 | ca963eefbc3331222b6121baa696d49ba2008811 |
| linux | linux | >= fa2bbff7b0b4e211fec5e5686ef96350690597b5 < 611d5cbc0b35a752e657a83eebadf40d814d006b | 611d5cbc0b35a752e657a83eebadf40d814d006b |
| linux | linux_kernel | < 6.1.103 | 6.1.103 |
| linux | linux_kernel | >= 0 < 6.1.106-1 | 6.1.106-1 |
| linux | linux_kernel | >= 0 < 6.10.3-1 | 6.10.3-1 |
| linux | linux_kernel | >= 0 < 6.10.3-1 | 6.10.3-1 |
| linux | linux_kernel | >= 0 < 6.8.0-48.48 | 6.8.0-48.48 |
| linux | linux_kernel | >= 6.2 < 6.6.44 | 6.6.44 |
| linux | linux_kernel | >= 6.7 < 6.10.3 | 6.10.3 |
| msrc | azl3_kernel_6.6.43.1-7_on_azure_linux_3.0 | — | — |
| msrc | azl3_kernel_6.6.47.1-1_on_azure_linux_3.0 | — | — |
| msrc | azure_linux_3.0_arm | — | — |
| msrc | azure_linux_3.0_x64 | — | — |
| msrc | cbl2_kernel_5.15.167.1-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_kernel_5.15.182.1-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
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_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
vendor_ubuntu5.5MEDIUM
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CVE-2024-43855: In the Linux kernel, the following vulnerability has been resolved: md: fix deadlock between mddev_suspend and flush bio Deadlock occurs when mddev is
osv·2024-08-17·CVSS 5.5
CVE-2024-43855 [MEDIUM] CVE-2024-43855: In the Linux kernel, the following vulnerability has been resolved: md: fix deadlock between mddev_suspend and flush bio Deadlock occurs when mddev is
In the Linux kernel, the following vulnerability has been resolved: md: fix deadlock between mddev_suspend and flush bio Deadlock occurs when mddev is being suspended while some flush bio is in progress. It is a complex issue. T1. the first flush is at the ending stage, it clears 'mddev->flush_bio' and tries to submit data, but is blocked because mddev is suspended by T4. T2. the second flush sets 'mddev->flush_bio', and attempts to queue md_submit_flush_data(), which is already running (T1) and won't execute again if on the same CPU as T1. T3. the third flush inc active_io and tries to flush, but is blocked because 'mddev->flush_bio' is not NULL (set by T2). T4. mddev_suspend() is called and waits for active_io dec to 0 which is inc by T3. T1 T2 T3 T4 (flush 1) (flush 2) (third 3) (suspen
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GHSA-5ffp-85mp-h2q2: In the Linux kernel, the following vulnerability has been resolved:
md: fix deadlock between mddev_suspend and flush bio
Deadlock occurs when mddev
ghsa_unreviewed·2024-08-17
CVE-2024-43855 [MEDIUM] CWE-476 GHSA-5ffp-85mp-h2q2: In the Linux kernel, the following vulnerability has been resolved:
md: fix deadlock between mddev_suspend and flush bio
Deadlock occurs when mddev
In the Linux kernel, the following vulnerability has been resolved:
md: fix deadlock between mddev_suspend and flush bio
Deadlock occurs when mddev is being suspended while some flush bio is in
progress. It is a complex issue.
T1. the first flush is at the ending stage, it clears 'mddev->flush_bio'
and tries to submit data, but is blocked because mddev is suspended
by T4.
T2. the second flush sets 'mddev->flush_bio', and attempts to queue
md_submit_flush_data(), which is already running (T1) and won't
execute again if on the same CPU as T1.
T3. the third flush inc active_io and tries to flush, but is blocked because
'mddev->flush_bio' is not NULL (set by T2).
T4. mddev_suspend() is called and waits for active_io dec to 0 which is inc
by T3.
T1 T2 T3 T4
(flush 1) (flush 2) (third 3) (su
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- ARM32 architecture;
- ARM64 architecture;
- MIPS architecture;
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- PowerPC architecture;
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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:
- ARM32 architecture;
- MIPS architecture;
- PA-RISC architecture;
- PowerPC architecture;
- RISC-V architecture;
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kernel did not properly check for the device to be enabled before
writing. A local attacker could possibly use this to cause a denial of
service. (CVE-2024-25741)
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:
- ARM32 architecture;
- MIPS architecture;
- PA-RISC architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- Cryptographic API;
- Serial ATA and Parallel ATA drivers;
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Chenyuan Yang discovered that the USB Gadget subsystem in the Linux
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service. (CVE-2024-25741)
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:
- ARM32 architecture;
- MIPS architecture;
- PA-RISC architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- Cryptographic API;
- Serial ATA and Parallel ATA drivers;
- Null block device driver;
- Bluetooth drivers;
- Cdrom driver;
- Clo
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Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Chenyuan Yang discovered that the USB Gadget subsystem in the Linux
kernel did not properly check for the device to be enabled before
writing. A local attacker could possibly use this to cause a denial of
service. (CVE-2024-25741)
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:
- ARM32 architecture;
- MIPS architecture;
- PA-RISC architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- Cryptographic API;
- Serial ATA and Parallel ATA drivers;
- Null block device driver;
- Bluetooth drivers;
- Cdrom driver;
- Clo
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CVE-2024-41050 [MEDIUM] Linux kernel vulnerabilities
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Summary: Several security issues were fixed in the Linux kernel.
Chenyuan Yang discovered that the USB Gadget subsystem in the Linux
kernel did not properly check for the device to be enabled before
writing. A local attacker could possibly use this to cause a denial of
service. (CVE-2024-25741)
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:
- ARM32 architecture;
- MIPS architecture;
- PA-RISC architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- Cryptographic API;
- Serial ATA and Parallel ATA drivers;
- Null block device driver;
- Bluetooth drivers;
- Cdrom driver;
- Clo
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vendor_ubuntu·2024-11-07·CVSS 5.5
CVE-2024-41050 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Chenyuan Yang discovered that the USB Gadget subsystem in the Linux
kernel did not properly check for the device to be enabled before
writing. A local attacker could possibly use this to cause a denial of
service. (CVE-2024-25741)
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:
- ARM32 architecture;
- MIPS architecture;
- PA-RISC architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- Cryptographic API;
- Serial ATA and Parallel ATA drivers;
- Null block device driver;
- Bluetooth drivers;
- Cdrom driver;
- Clo
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CVE-2024-42131 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Chenyuan Yang discovered that the USB Gadget subsystem in the Linux
kernel did not properly check for the device to be enabled before
writing. A local attacker could possibly use this to cause a denial of
service. (CVE-2024-25741)
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:
- ARM32 architecture;
- MIPS architecture;
- PA-RISC architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- Cryptographic API;
- Serial ATA and Parallel ATA drivers;
- Null block device driver;
- Bluetooth drivers;
- Cdrom driver;
- Clo
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CVE-2024-42136 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Chenyuan Yang discovered that the USB Gadget subsystem in the Linux
kernel did not properly check for the device to be enabled before
writing. A local attacker could possibly use this to cause a denial of
service. (CVE-2024-25741)
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:
- ARM32 architecture;
- MIPS architecture;
- PA-RISC architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- Cryptographic API;
- Serial ATA and Parallel ATA drivers;
- Null block device driver;
- Bluetooth drivers;
- Cdrom driver;
- Clo
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vendor_ubuntu·2024-11-01·CVSS 5.5
CVE-2024-42103 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Chenyuan Yang discovered that the USB Gadget subsystem in the Linux
kernel did not properly check for the device to be enabled before
writing. A local attacker could possibly use this to cause a denial of
service. (CVE-2024-25741)
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:
- ARM32 architecture;
- MIPS architecture;
- PA-RISC architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- Cryptographic API;
- Serial ATA and Parallel ATA drivers;
- Null block device driver;
- Bluetooth drivers;
- Cdrom driver;
- Clo
Red Hat
kernel: md: fix deadlock between mddev_suspend and flush bio
vendor_redhat·2024-08-17·CVSS 5.5
CVE-2024-43855 [MEDIUM] CWE-833 kernel: md: fix deadlock between mddev_suspend and flush bio
kernel: md: fix deadlock between mddev_suspend and flush bio
In the Linux kernel, the following vulnerability has been resolved:
md: fix deadlock between mddev_suspend and flush bio
Deadlock occurs when mddev is being suspended while some flush bio is in
progress. It is a complex issue.
T1. the first flush is at the ending stage, it clears 'mddev->flush_bio'
and tries to submit data, but is blocked because mddev is suspended
by T4.
T2. the second flush sets 'mddev->flush_bio', and attempts to queue
md_submit_flush_data(), which is already running (T1) and won't
execute again if on the same CPU as T1.
T3. the third flush inc active_io and tries to flush, but is blocked because
'mddev->flush_bio' is not NULL (set by T2).
T4. mddev_suspend() is called and waits for active_io dec to 0 which i
Microsoft
md: fix deadlock between mddev_suspend and flush bio
vendor_msrc·2024-08-13·CVSS 5.5
CVE-2024-43855 [MEDIUM] CWE-476 md: fix deadlock between mddev_suspend and flush bio
md: fix deadlock between mddev_suspend and flush bio
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.mi
Debian
CVE-2024-43855: linux - In the Linux kernel, the following vulnerability has been resolved: md: fix dea...
vendor_debian·2024·CVSS 5.5
CVE-2024-43855 [MEDIUM] CVE-2024-43855: linux - In the Linux kernel, the following vulnerability has been resolved: md: fix dea...
In the Linux kernel, the following vulnerability has been resolved: md: fix deadlock between mddev_suspend and flush bio Deadlock occurs when mddev is being suspended while some flush bio is in progress. It is a complex issue. T1. the first flush is at the ending stage, it clears 'mddev->flush_bio' and tries to submit data, but is blocked because mddev is suspended by T4. T2. the second flush sets 'mddev->flush_bio', and attempts to queue md_submit_flush_data(), which is already running (T1) and won't execute again if on the same CPU as T1. T3. the third flush inc active_io and tries to flush, but is blocked because 'mddev->flush_bio' is not NULL (set by T2). T4. mddev_suspend() is called and waits for active_io dec to 0 which is inc by T3. T1 T2 T3 T4 (flush 1) (flush 2) (third 3) (suspen
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://git.kernel.org/stable/c/2d0738a8322bf4e5bfe693d16b3111928a9ccfbfhttps://git.kernel.org/stable/c/32226070813140234b6c507084738e8e8385c5c6https://git.kernel.org/stable/c/611d5cbc0b35a752e657a83eebadf40d814d006bhttps://git.kernel.org/stable/c/ca963eefbc3331222b6121baa696d49ba2008811https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
2024-08-17
Published