- 8.8HighCVSS base score
- 0.36%Exploitation in 30 daysEPSS · top 70% 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: crypto: ecc - Fix carry overflow in vli multiplication The carry flag calculation fails when r01.m_high is saturated (0xFFFFFFFFFFFFFFFF) and addition of lower bits overflows. The condition (r01.m_high < product.m_high) doesn't handle the case where r01.m_high == product.m_high and an additional carry exists from lower-bit overflow. When commit 3c4b23901a0c ("crypto: ecdh - Add ECDH software support") introduced crypto/ecc.c, it split the muladd() function in the micro-ecc library into separate mul_64_64() and add_128_128() helpers. It seems the check got lost in translation. Add proper handling for this boundary by accounting for the carry from the lower addition.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 3 months later
· 3 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 |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.36% · top 70% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 – < d11b2bb99bec1f5557c01cac42231e23745f49b8
- affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 – < b709e0e768766abe29a49e1c1922a1604be602f4
- affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 – < 24a54dfa06d09813b4802a374fad3d2c0e16a884
- affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 – < 677450e5ef850c4d28b7956aa01104548c2a894e
- affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 – < 5275e0fca256d081e2e7d4ba3dd8216c6e50d44e
- affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 – < 774ddddf5eb26eeca177350413e3e2bc50930ee9
- affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 – < ebaae7c4251cc0cdb2602f334d4f08a3e82d271e
- affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 – < 27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406
- affected 4.8
- unaffected < 4.8
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/d11b2bb99bec1f5557c01cac42231e23745f49b8 (opens in a new tab)
- https://git.kernel.org/stable/c/b709e0e768766abe29a49e1c1922a1604be602f4 (opens in a new tab)
- https://git.kernel.org/stable/c/24a54dfa06d09813b4802a374fad3d2c0e16a884 (opens in a new tab)
- https://git.kernel.org/stable/c/677450e5ef850c4d28b7956aa01104548c2a894e (opens in a new tab)
- https://git.kernel.org/stable/c/5275e0fca256d081e2e7d4ba3dd8216c6e50d44e (opens in a new tab)
- https://git.kernel.org/stable/c/774ddddf5eb26eeca177350413e3e2bc50930ee9 (opens in a new tab)
- https://git.kernel.org/stable/c/ebaae7c4251cc0cdb2602f334d4f08a3e82d271e (opens in a new tab)
- https://git.kernel.org/stable/c/27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406 (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-2026-49025 (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-2026-64313)Record last updated .