VulnerabilityPublished 24 Jun 2026Updated 6 Nov 2026

CVE-2026-53063: Linux kernel · dm cache: fix write hang in passthrough mode

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in ecb10c193cbebf5e6984246a9b4ff1f95d45ed87 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:49 UTC

Severity

Unrated

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

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in ecb10c193cbebf5e6984246a9b4ff1f95d45ed87, b8ace9e96983abb20ccf39edce8a60f1bb0b83d8, 05798d091ebcfb6d68228890e593f209e8ac940d +3

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 6 Nov 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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 to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ b29d4986d0da1a27cd35917cdb433672f5c95d7f, < ecb10c193cbebf5e6984246a9b4ff1f95d45ed87	Fixed in ecb10c193cbebf5e6984246a9b4ff1f95d45ed87
LinuxLinux	Affected ≥ b29d4986d0da1a27cd35917cdb433672f5c95d7f, < b8ace9e96983abb20ccf39edce8a60f1bb0b83d8	Fixed in b8ace9e96983abb20ccf39edce8a60f1bb0b83d8
LinuxLinux	Affected ≥ b29d4986d0da1a27cd35917cdb433672f5c95d7f, < 05798d091ebcfb6d68228890e593f209e8ac940d	Fixed in 05798d091ebcfb6d68228890e593f209e8ac940d
LinuxLinux	Affected ≥ b29d4986d0da1a27cd35917cdb433672f5c95d7f, < 64d6519b00be4116d365bd31f33a5e5ce2944c1a	Fixed in 64d6519b00be4116d365bd31f33a5e5ce2944c1a
LinuxLinux	Affected ≥ b29d4986d0da1a27cd35917cdb433672f5c95d7f, < 9fa18d0b981776b190ca4632942a7c2174052b78	Fixed in 9fa18d0b981776b190ca4632942a7c2174052b78
LinuxLinux	Affected ≥ b29d4986d0da1a27cd35917cdb433672f5c95d7f, < 4ca8b8bd952df7c3ccdc68af9bd3419d0839a04b	Fixed in 4ca8b8bd952df7c3ccdc68af9bd3419d0839a04b

Description

In the Linux kernel, the following vulnerability has been resolved: dm cache: fix write hang in passthrough mode The invalidate_remove() function has incomplete logic for handling write hit bios after cache invalidation. It sets up the remapping for the overwrite_bio but then drops it immediately without submission, causing write operations to hang. Fix by adding a new invalidate_committed() continuation that submits the remapped writes to the cache origin after metadata commit completes, while using the overwrite_endio hook to ensure proper completion sequencing. This maintains existing coherency. Also improve error handling in invalidate_complete() to preserve the original error status instead of using bio_io_error() unconditionally.

References

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