CVE-2026-89839
CVE CVE-2026-89839EUVD EUVD-2026-80439Published 2026-09-16T10:31:13.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: f2fs: use the mount idmap for the owner check in f2fs_xattr_advise_set() f2fs_xattr_advise_set() calls inode_owner_or_capable() with &nop_mnt_idmap before allowing the "system.advise" xattr to be set, instead of the idmap that the VFS passes to the ->set() handler. f2fs supports idmapped mounts, so on such a mount this checks the caller's fsuid against the unmapped on-disk owner rather than the mapped owner: the actual owner can be wrongly denied with -EPERM and an unrelated caller wrongly allowed. Pass the handler's idmap instead.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 01beba7957a26f9b7179127e8ad56bb5a0f56138 <a54ffce4637acb0db8e695188a6c7f99f14c3576; patch: 0; 6.3; 01beba7957a26f9b7179127e8ad56bb5a0f56138 <3b681229e9f8fb1dd29bc65983bf3c87779e4ca3; patch: 6.18.51; patch: 6.6.157; patch: 7.2.5; 01beba7957a26f9b7179127e8ad56bb5a0f56138 <c3e2692c7a58e0bdb84bd658d827e89dcecea3ad; 01beba7957a26f9b7179127e8ad56bb5a0f56138 <4c0c610b480cfbc57528aa1acbd6be12ed2a6fb1; 01beba7957a26f9b7179127e8ad56bb5a0f56138 <ab31e3b774f5d06b4489cef6c297b48c47c9dcbd; patch: 7.3-rc1; patch: 6.12.110
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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