CVE-2026-80806: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-80806DEBIAN-CVE-2026-80806
Published 04-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-80806 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.4% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.17%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 1
MGASA-2026-0506OPENSUSE-SU-2026:11773-1

Timeline

  1. 04-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: don't enable DAX on new encrypted files Currently, when a new encrypted regular file is created, the call to ext4_set_inode_flags(inode, init=true) in __ext4_new_inode() is made before EXT4_INODE_ENCRYPT is set. As a result, it can set S_DAX if the filesystem is mounted with "-o dax=always". EXT4_INODE_ENCRYPT then actually gets set a bit later in __ext4_new_inode(), when it calls fscrypt_set_context() which calls ext4_set_context(). ext4_set_context() sets EXT4_INODE_ENCRYPT and calls ext4_set_inode_flags(inode, init=false) to set S_ENCRYPTED too. This was intended to clear S_DAX as well. However, this was broken by commit 043546e46dc7 ("fs/ext4: Only change S_DAX on inode load"). This causes data written to the file to bypass encryption, also causing xfstests failures such as generic/548 (when "-o dax=always" is used). Fix this by simplifying the flow by making __ext4_new_inode() set EXT4_INODE_ENCRYPT earlier. This makes it take effect in ext4_set_inode_flags(inode, init=true), making S_DAX never be set. Similarly, make EXT4_STATE_MAY_INLINE_DATA never be set in the first place on new encrypted inodes. Then it doesn't need to be cleared. As a result of these simplifications, ext4_set_context() no longer needs to change inode flags or state when 'handle != NULL'. Remove that too.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

0.00 pp

From 0.17% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.17%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu157 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.111-1 | < 7.1.12-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 043546e46dc70c25ff7e2cf6d09cbb0424fc9978, < add98959b220935b243170214c787bc03044a44d | ≥ 043546e46dc70c25ff7e2cf6d09cbb0424fc9978, < f53b325068bca0b238c3e0d2eb7de9b1f2268cab | ≥ 043546e46dc70c25ff7e2cf6d09cbb0424fc9978, < 5959cad3cfa852ec07bbdaf9c17f4838a94a8e6c | ≥ 043546e46dc70c25ff7e2cf6d09cbb0424fc9978, < a13f61ba9b2a7a4ff1f140949ccfad23c5313757 | ≥ 043546e46dc70c25ff7e2cf6d09cbb0424fc9978, < ed1cd834da65db127f1c30ff67e78f14825a06c1 | ≥ 043546e46dc70c25ff7e2cf6d09cbb0424fc9978, < 458776af0061afec1014cb3cd0061e282e482e83 | ≥ 043546e46dc70c25ff7e2cf6d09cbb0424fc9978, < 3392391b363a63ebb531d45318a729b1c998565b | ≥ 043546e46dc70c25ff7e2cf6d09cbb0424fc9978, < e27bae352158c007143d5bb50f3af33a177c0a37 | ≥ 043546e46dc70c25ff7e2cf6d09cbb0424fc9978, < da32af420d6d466e247c43ac0b829edeac7ae0ad | 5.8

3 vendors · 160 products

References

14 links
Show all 14 references