CVE-2026-64217netfs: Fix overrun check in netfs_extract_user_iter()
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% 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: netfs: Fix overrun check in netfs_extract_user_iter() Fix netfs_extract_user_iter() so that if iov_iter_extract_pages() overfills pages[], then those pages don't get included in the iterator constructed at the end of the function. If there was an overfill, memory corruption has already happened.
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 12 days later
· 12 days 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 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 85dd2c8ff368b1446be9febde84afe1d7aec4261 – < 00efe58bbdcc93272d579ca24bfc912563f4a204
- affected 85dd2c8ff368b1446be9febde84afe1d7aec4261 – < 96cc3beb2390ba9f9c128c5733c0ccfe450dd4f9
- affected 85dd2c8ff368b1446be9febde84afe1d7aec4261 – < afeb32d9bf9aaeea51d0f723a19f14afb73bd94d
- affected 85dd2c8ff368b1446be9febde84afe1d7aec4261 – < f48b9157f0f611fa436c360648603d5ded719b12
- affected 85dd2c8ff368b1446be9febde84afe1d7aec4261 – < 0ef37eef83fad3542ee06db2940433ae1a92b39d
- affected 6.3
- unaffected < 6.3
- unaffected 6.6.142 – ≤ 6.6.*
- unaffected 6.12.92 – ≤ 6.12.*
- unaffected 6.18.34 – ≤ 6.18.*
- unaffected 7.0.11 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References5
- https://git.kernel.org/stable/c/00efe58bbdcc93272d579ca24bfc912563f4a204 (opens in a new tab)
- https://git.kernel.org/stable/c/96cc3beb2390ba9f9c128c5733c0ccfe450dd4f9 (opens in a new tab)
- https://git.kernel.org/stable/c/afeb32d9bf9aaeea51d0f723a19f14afb73bd94d (opens in a new tab)
- https://git.kernel.org/stable/c/f48b9157f0f611fa436c360648603d5ded719b12 (opens in a new tab)
- https://git.kernel.org/stable/c/0ef37eef83fad3542ee06db2940433ae1a92b39d (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-2026-48625 (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-2026-64217)Record last updated .