CVE-2025-37984
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
crypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP()
In the Linux kernel, the following vulnerability has been resolved: crypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP() Herbert notes that DIV_ROUND_UP() may overflow unnecessarily if an ecdsa implementation's ->key_size() callback returns an unusually large value. Herbert instead suggests (for a division by 8): X / 8 + !!(X & 7) Based on this formula, introduce a generic DIV_ROUND_UP_POW2() macro and use it in lieu of DIV_ROUND_UP() for ->key_size() return values. Additionally, use the macro in ecc_digits_from_bytes(), whose "nbytes" parameter is a ->key_size() return value in some instances, or a user-specified ASN.1 length in the case of ecdsa_get_signature_rs().
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 55779f26eab9af12474a447001bd17070f055712 | affected | git | f02f0218be412cff1c844addf58e002071be298b | Unavailable | None listed |
| c6ab5c915da460c0397960af3c308386c3f3247b | affected | git | f2133b849ff273abddb6da622daddd8f6f6fa448 | Unavailable | None listed |
| c6ab5c915da460c0397960af3c308386c3f3247b | affected | git | 921b8167f10708e38080f84e195cdc68a7a561f1 | Unavailable | None listed |
| c6ab5c915da460c0397960af3c308386c3f3247b | affected | git | b16510a530d1e6ab9683f04f8fb34f2e0f538275 | Unavailable | None listed |
| 6.6.70 | affected | semver | 6.6.99 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.10 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.10 | Unavailable | None listed |
| 6.6.99 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.39 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.14.5 | unaffected | semver | Unavailable | 6.14.* | None listed |
| 6.15 | unaffected | original_commit_for_fix | Unavailable | * | None listed |