CVE-2026-97415
CVE CVE-2026-97415EUVD EUVD-2026-86028Published 2026-09-24T16:03:22.000ZLast changed 2026-09-25T12:43:50.000ZCVSS 7.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: btrfs: tree-checker: validate names in ROOT_REF and ROOT_BACKREF ROOT_REF and ROOT_BACKREF items contain a struct btrfs_root_ref followed by the subvolume name. Several readers assume that this layout is already valid and then use the on-disk name length directly. A corrupted item can therefore make those readers address bytes outside the item, and BTRFS_IOC_GET_SUBVOL_INFO can copy too many bytes into its fixed-size UAPI name buffer. Validate ROOT_REF and ROOT_BACKREF items in tree-checker before any reader uses them. Reject records that do not contain a non-empty name, whose name_len does not exactly describe the remaining item payload, or whose name exceeds BTRFS_NAME_LEN. For BTRFS_IOC_GET_SUBVOL_INFO, copy only the validated on-disk name_len instead of deriving the copy length from the item size. The ioctl result is zeroed when allocated. That leaves the existing trailing zero byte untouched.
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 2ede0daf01549cecf4bb0962c46dc47382047523 <9154542070ca7eadb3c764a882f39a127677854b; patch: 6.18.53; patch: 0; patch: 7.2; patch: 6.12.111; 2ede0daf01549cecf4bb0962c46dc47382047523 <0af37c217edf15fa21dac1c40822086df356c6bb; 2.6.37; 2ede0daf01549cecf4bb0962c46dc47382047523 <74f577c722c99248d804eca18e7de7c5e47549d7
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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