CVE-2026-89606ecryptfs: reject too-small tag 70 packets
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 9c79f34f7ee71cd28272332b424ca64b2be006ab before df5f375a6151ef71f636da044bcef90c26697255; from 9c79f34f7ee71cd28272332b424ca64b2be006ab before 5668121974eb7f7aa82793a9d0d13abadb8904dc; 9c79f34f7ee71cd28272332b424ca64b2be006ab builds before 2e5afed9503dd1d85004c09503adc2cb584c0188; from 9c79f34f7ee71cd28272332b424ca64b2be006ab before 414a0f04feb06f03523edf7e2a8be1d7f1a9b160; from 9c79f34f7ee71cd28272332b424ca64b2be006ab before 9d88391bbed76eb091cddd50b0af87b1c6f22589; from 9c79f34f7ee71cd28272332b424ca64b2be006ab before b31da1ecf13929a8d7f8d2727843d2fe35396b75; from 9c79f34f7ee71cd28272332b424ca64b2be006ab before d2869768eab5648e6edc05f47e0716e5328e6681; from 9c79f34f7ee71cd28272332b424ca64b2be006ab before e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f | CNA record |
References
- https://git.kernel.org/stable/c/df5f375a6151ef71f636da044bcef90c26697255
- https://git.kernel.org/stable/c/5668121974eb7f7aa82793a9d0d13abadb8904dc
- https://git.kernel.org/stable/c/2e5afed9503dd1d85004c09503adc2cb584c0188
- https://git.kernel.org/stable/c/414a0f04feb06f03523edf7e2a8be1d7f1a9b160
- https://git.kernel.org/stable/c/9d88391bbed76eb091cddd50b0af87b1c6f22589
- https://git.kernel.org/stable/c/b31da1ecf13929a8d7f8d2727843d2fe35396b75
- https://git.kernel.org/stable/c/d2869768eab5648e6edc05f47e0716e5328e6681
- https://git.kernel.org/stable/c/e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.