CVE-2026-63820

CVE CVE-2026-63820EUVD EUVD-2026-45486Published 2026-07-19T12:02:18.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix missing read bio submission on large folio error f2fs_read_data_large_folio() can keep a read bio across multiple readahead folios. If a later folio hits an error before any of its blocks are added to the bio, folio_in_bio is false and the current error path returns immediately after ending that folio. This can leave the bio accumulated for earlier folios unsubmitted. Those folios then never receive read completion, and readers can wait indefinitely on the locked folios. Route errors through the common out path so any pending bio is submitted before returning. Stop consuming more readahead folios once an error is seen, and only wait on and clear the current folio when it was actually added to the bio.

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 patch: 7.1.3; patch: 0; patch: 7.2-rc1; 7.0; a5d8b9d94e1863f3ebb7182c238b2c713f6f4efd <74c8d2ec95c59a5651ecd975c466998af1961fd4; a5d8b9d94e1863f3ebb7182c238b2c713f6f4efd <48c92559e7b66fdc3cbc74f6e152e66ec0150a0a

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

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.