CVE-2026-89606ecryptfs: reject too-small tag 70 packets
- 7.8HighCVSS base score
- 0.14%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: ecryptfs: reject too-small tag 70 packets ecryptfs_parse_tag_70_packet() subtracts fixed metadata fields from the parsed packet body size to derive the encrypted filename size. A malformed packet with a body smaller than those fixed fields can underflow that size calculation. Reject tag 70 packets before the subtraction unless the body contains the signature, cipher code, and at least one byte of encrypted filename data.
Timeline
ID reserved
By Linux
Published
- 38 days later
· 38 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 · Received | 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)
- 0.14% · 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 9c79f34f7ee71cd28272332b424ca64b2be006ab – < df5f375a6151ef71f636da044bcef90c26697255
- affected 9c79f34f7ee71cd28272332b424ca64b2be006ab – < 5668121974eb7f7aa82793a9d0d13abadb8904dc
- affected 9c79f34f7ee71cd28272332b424ca64b2be006ab – < 2e5afed9503dd1d85004c09503adc2cb584c0188
- affected 9c79f34f7ee71cd28272332b424ca64b2be006ab – < 414a0f04feb06f03523edf7e2a8be1d7f1a9b160
- affected 9c79f34f7ee71cd28272332b424ca64b2be006ab – < 9d88391bbed76eb091cddd50b0af87b1c6f22589
- affected 9c79f34f7ee71cd28272332b424ca64b2be006ab – < b31da1ecf13929a8d7f8d2727843d2fe35396b75
- affected 9c79f34f7ee71cd28272332b424ca64b2be006ab – < d2869768eab5648e6edc05f47e0716e5328e6681
- affected 9c79f34f7ee71cd28272332b424ca64b2be006ab – < e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f
- affected 2.6.29
- unaffected < 2.6.29
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/df5f375a6151ef71f636da044bcef90c26697255 (opens in a new tab)
- https://git.kernel.org/stable/c/5668121974eb7f7aa82793a9d0d13abadb8904dc (opens in a new tab)
- https://git.kernel.org/stable/c/2e5afed9503dd1d85004c09503adc2cb584c0188 (opens in a new tab)
- https://git.kernel.org/stable/c/414a0f04feb06f03523edf7e2a8be1d7f1a9b160 (opens in a new tab)
- https://git.kernel.org/stable/c/9d88391bbed76eb091cddd50b0af87b1c6f22589 (opens in a new tab)
- https://git.kernel.org/stable/c/b31da1ecf13929a8d7f8d2727843d2fe35396b75 (opens in a new tab)
- https://git.kernel.org/stable/c/d2869768eab5648e6edc05f47e0716e5328e6681 (opens in a new tab)
- https://git.kernel.org/stable/c/e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f (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-2026-76518 (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-2026-89606)Record last updated .