CVE-2025-21793
published 2025-02-27CVE-2025-21793: In the Linux kernel, the following vulnerability has been resolved: spi: sn-f-ospi: Fix division by zero When there is no dummy cycle in the spi-nor commands…
PriorityP418medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.21%
11.9th percentile
In the Linux kernel, the following vulnerability has been resolved:
spi: sn-f-ospi: Fix division by zero
When there is no dummy cycle in the spi-nor commands, both dummy bus cycle
bytes and width are zero. Because of the cpu's warning when divided by
zero, the warning should be avoided. Return just zero to avoid such
calculations.
Affected
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.12.16-1 (forky) | linux 6.12.16-1 (forky) |
| linux | linux | — | — |
| linux | linux | >= 1b74dd64c8612619e399e5a31da79a3636914495 < 966328191b4c389c0f2159fa242915f51cbc1679 | 966328191b4c389c0f2159fa242915f51cbc1679 |
| linux | linux | >= 1b74dd64c8612619e399e5a31da79a3636914495 < 4df6f005bef04a3dd16c028124a1b5684db3922b | 4df6f005bef04a3dd16c028124a1b5684db3922b |
| linux | linux | >= 1b74dd64c8612619e399e5a31da79a3636914495 < 7434135553bc03809a55803ee6a8dcaae6240d55 | 7434135553bc03809a55803ee6a8dcaae6240d55 |
| linux | linux | >= 1b74dd64c8612619e399e5a31da79a3636914495 < 3588b1c0fde2f58d166e3f94a5a58d64b893526c | 3588b1c0fde2f58d166e3f94a5a58d64b893526c |
| 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 | >= 6.13 < 6.13.4 | 6.13.4 |
| linux | linux_kernel | >= 6.2 < 6.6.79 | 6.6.79 |
| linux | linux_kernel | >= 6.7 < 6.12.16 | 6.12.16 |
| msrc | azl3_kernel_6.6.78.1-3_on_azure_linux_3.0 | — | — |
| msrc | azl3_kernel_6.6.79.1-1_on_azure_linux_3.0 | — | — |
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_debian5.5LOW
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
vendor_ubuntu5.5MEDIUM
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CVE-2025-21793: In the Linux kernel, the following vulnerability has been resolved: spi: sn-f-ospi: Fix division by zero When there is no dummy cycle in the spi-nor c
osv·2025-02-27·CVSS 5.5
CVE-2025-21793 [MEDIUM] CVE-2025-21793: In the Linux kernel, the following vulnerability has been resolved: spi: sn-f-ospi: Fix division by zero When there is no dummy cycle in the spi-nor c
In the Linux kernel, the following vulnerability has been resolved: spi: sn-f-ospi: Fix division by zero When there is no dummy cycle in the spi-nor commands, both dummy bus cycle bytes and width are zero. Because of the cpu's warning when divided by zero, the warning should be avoided. Return just zero to avoid such calculations.
GHSA
GHSA-49w9-5v8p-jcmw: In the Linux kernel, the following vulnerability has been resolved:
spi: sn-f-ospi: Fix division by zero
When there is no dummy cycle in the spi-nor
ghsa_unreviewed·2025-02-27
CVE-2025-21793 [MEDIUM] CWE-369 GHSA-49w9-5v8p-jcmw: In the Linux kernel, the following vulnerability has been resolved:
spi: sn-f-ospi: Fix division by zero
When there is no dummy cycle in the spi-nor
In the Linux kernel, the following vulnerability has been resolved:
spi: sn-f-ospi: Fix division by zero
When there is no dummy cycle in the spi-nor commands, both dummy bus cycle
bytes and width are zero. Because of the cpu's warning when divided by
zero, the warning should be avoided. Return just zero to avoid such
calculations.
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An attacker could possibly use these to compromise the system.
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- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Bluetooth drivers;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
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- I2C subsystem;
- I3C subsystem;
- InfiniBand drivers;
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Red Hat
kernel: spi: sn-f-ospi: Fix division by zero
vendor_redhat·2025-02-27·CVSS 5.5
CVE-2025-21793 [MEDIUM] CWE-369 kernel: spi: sn-f-ospi: Fix division by zero
kernel: spi: sn-f-ospi: Fix division by zero
In the Linux kernel, the following vulnerability has been resolved:
spi: sn-f-ospi: Fix division by zero
When there is no dummy cycle in the spi-nor commands, both dummy bus cycle
bytes and width are zero. Because of the cpu's warning when divided by
zero, the warning should be avoided. Return just zero to avoid such
calculations.
Package: kernel (Red Hat Enterprise Linux 10) - Not affected
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 (Red Hat Enterprise Linux 9) -
Microsoft
spi: sn-f-ospi: Fix division by zero
vendor_msrc·2025-02-11·CVSS 5.5
CVE-2025-21793 [MEDIUM] spi: sn-f-ospi: Fix division by zero
spi: sn-f-ospi: Fix division by zero
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-2025-21793: linux - In the Linux kernel, the following vulnerability has been resolved: spi: sn-f-o...
vendor_debian·2025·CVSS 5.5
CVE-2025-21793 [MEDIUM] CVE-2025-21793: linux - In the Linux kernel, the following vulnerability has been resolved: spi: sn-f-o...
In the Linux kernel, the following vulnerability has been resolved: spi: sn-f-ospi: Fix division by zero When there is no dummy cycle in the spi-nor commands, both dummy bus cycle bytes and width are zero. Because of the cpu's warning when divided by zero, the warning should be avoided. Return just zero to avoid such calculations.
Scope: local
bookworm: resolved
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.
2025-02-27
Published