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CVE-2025-21793spi: sn-f-ospi: Fix division by zero
- 5.5MediumCVSS base score
- 0.22%Exploitation in 30 daysEPSS · top 87% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 2 months later
· 2 months later
Published
- 15 months later
· 15 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.22% · top 87% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 1b74dd64c8612619e399e5a31da79a3636914495 – < 966328191b4c389c0f2159fa242915f51cbc1679
- affected 1b74dd64c8612619e399e5a31da79a3636914495 – < 4df6f005bef04a3dd16c028124a1b5684db3922b
- affected 1b74dd64c8612619e399e5a31da79a3636914495 – < 7434135553bc03809a55803ee6a8dcaae6240d55
- affected 1b74dd64c8612619e399e5a31da79a3636914495 – < 3588b1c0fde2f58d166e3f94a5a58d64b893526c
- affected 6.2
- unaffected < 6.2
- unaffected 6.6.79 – ≤ 6.6.*
- unaffected 6.12.16 – ≤ 6.12.*
- unaffected 6.13.4 – ≤ 6.13.*
- unaffected 6.14 – ≤ *
References
References4
- https://git.kernel.org/stable/c/966328191b4c389c0f2159fa242915f51cbc1679 (opens in a new tab)
- https://git.kernel.org/stable/c/4df6f005bef04a3dd16c028124a1b5684db3922b (opens in a new tab)
- https://git.kernel.org/stable/c/7434135553bc03809a55803ee6a8dcaae6240d55 (opens in a new tab)
- https://git.kernel.org/stable/c/3588b1c0fde2f58d166e3f94a5a58d64b893526c (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-5131 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-21793)Record last updated .