VulnerabilityPublished 24 Sep 2026Updated 30 Oct 2026

CVE-2026-93269: Linux kernel · ext4: fix circular lock dependency in ext4_ext_migrate

Source GCVE Database

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Authoritative record:CVE-2026-93269· Medium

Not known to be exploited · fixed in f204882d5eaca09f7848f081c9c9b5bbf2234895 : update Linux kernel when convenient.

Data as of 30 Oct 2026, 18:02 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Patch: Available – fixed in f204882d5eaca09f7848f081c9c9b5bbf2234895, e4223231b6860141813637a6413c2371ae4d6fa8, ada23457d4748d6e9c36c6f871fc29a6f558c48c +8

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Sep 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 30 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.
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.

ghsa-9p82-h2x3-6rrv

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected >=4.9.215 <4.10 >=4.14.172 <4.15 >=4.19.107 <4.20 >=5.4.23 <5.5 >=5.5.7 <5.6	Fixed in f204882d5eaca09f7848f081c9c9b5bbf2234895 e4223231b6860141813637a6413c2371ae4d6fa8 ada23457d4748d6e9c36c6f871fc29a6f558c48c a897682793eba5de51ee6f3152760374afa629cf 452950461241dfed8b1d32e94b227db38c99c5af 32f7ab52875ec7f800ca67e7176e5743a84baddf 5.6 5.5 4.20 4.15 4.10
LinuxLinux	Affected =5.6	Fixed in–

AI-suggested

A fix is available that reorders the iput(tmp_inode) call to occur after releasing the s_writepages_rwsem lock, preventing the circular lock dependency and deadlock. Users should apply the official Linux kernel update containing this fix once available. No other mitigation actions are indicated.

Description

A deadlock vulnerability in the Linux kernel's ext4 filesystem code was fixed by changing the order of inode release to avoid a circular lock dependency. The issue involved the ext4_ext_migrate function and a temporary inode's eviction causing a deadlock between s_writepages_rwsem and sb_internal locks.

References

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