CVE-2026-89606
ecryptfs: reject too-small tag 70 packets
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 11, 2026 |
| Last Updated | Sep 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
9c79f34f7ee71cd28272332b424ca64b2be006ab < df5f375a6151ef71f636da044bcef90c26697255 9c79f34f7ee71cd28272332b424ca64b2be006ab < 5668121974eb7f7aa82793a9d0d13abadb8904dc 9c79f34f7ee71cd28272332b424ca64b2be006ab < 2e5afed9503dd1d85004c09503adc2cb584c0188 9c79f34f7ee71cd28272332b424ca64b2be006ab < 414a0f04feb06f03523edf7e2a8be1d7f1a9b160 9c79f34f7ee71cd28272332b424ca64b2be006ab < 9d88391bbed76eb091cddd50b0af87b1c6f22589 9c79f34f7ee71cd28272332b424ca64b2be006ab < b31da1ecf13929a8d7f8d2727843d2fe35396b75 9c79f34f7ee71cd28272332b424ca64b2be006ab < d2869768eab5648e6edc05f47e0716e5328e6681 9c79f34f7ee71cd28272332b424ca64b2be006ab < e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f
Linux / Linux
2.6.29
References
git.kernel.org: https://git.kernel.org/stable/c/df5f375a6151ef71f636da044bcef90c26697255 git.kernel.org: https://git.kernel.org/stable/c/5668121974eb7f7aa82793a9d0d13abadb8904dc git.kernel.org: https://git.kernel.org/stable/c/2e5afed9503dd1d85004c09503adc2cb584c0188 git.kernel.org: https://git.kernel.org/stable/c/414a0f04feb06f03523edf7e2a8be1d7f1a9b160 git.kernel.org: https://git.kernel.org/stable/c/9d88391bbed76eb091cddd50b0af87b1c6f22589 git.kernel.org: https://git.kernel.org/stable/c/b31da1ecf13929a8d7f8d2727843d2fe35396b75 git.kernel.org: https://git.kernel.org/stable/c/d2869768eab5648e6edc05f47e0716e5328e6681 git.kernel.org: https://git.kernel.org/stable/c/e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f