VulnerabilityPublished 22 Apr 2026Updated 23 Oct 2026

CVE-2026-31514: Linux kernel · erofs: set fileio bio failed in short read case

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in eade54040384f54b7fb330e4b0975c5734850b3c : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in eade54040384f54b7fb330e4b0975c5734850b3c, d1ba7d6b3cd1757b108d7b6856c92ae661d6c323, 5cf3972c8221abdb1b464a14ccf8103d840b9085 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 22 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to eade54040384f54b7fb330e4b0975c5734850b3c, d1ba7d6b3cd1757b108d7b6856c92ae661d6c323, 5cf3972c8221abdb1b464a14ccf8103d840b9085 or 5a5f23ef5431639db1ac3a0b274aef3a84cc413c.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ ce63cb62d794c98c7631c2296fa845f2a8d0a4a1, < eade54040384f54b7fb330e4b0975c5734850b3c	Fixed in eade54040384f54b7fb330e4b0975c5734850b3c
LinuxLinux	Affected ≥ ce63cb62d794c98c7631c2296fa845f2a8d0a4a1, < d1ba7d6b3cd1757b108d7b6856c92ae661d6c323	Fixed in d1ba7d6b3cd1757b108d7b6856c92ae661d6c323
LinuxLinux	Affected ≥ ce63cb62d794c98c7631c2296fa845f2a8d0a4a1, < 5cf3972c8221abdb1b464a14ccf8103d840b9085	Fixed in 5cf3972c8221abdb1b464a14ccf8103d840b9085
LinuxLinux	Affected ≥ ce63cb62d794c98c7631c2296fa845f2a8d0a4a1, < 5a5f23ef5431639db1ac3a0b274aef3a84cc413c	Fixed in 5a5f23ef5431639db1ac3a0b274aef3a84cc413c
LinuxLinux	Affected =6.12	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: erofs: set fileio bio failed in short read case For file-backed mount, IO requests are handled by vfs_iocb_iter_read(). However, it can be interrupted by SIGKILL, returning the number of bytes actually copied. Unused folios in bio are unexpectedly marked as uptodate. vfs_read filemap_read filemap_get_pages filemap_readahead erofs_fileio_readahead erofs_fileio_rq_submit vfs_iocb_iter_read filemap_read filemap_get_pages <= detect signal erofs_fileio_ki_complete <= set all folios uptodate This patch addresses this by setting short read bio with an error directly.

References

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