CVE-2026-93269: Linux vulnerability

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

In the Linux kernel, the following vulnerability has been resolved: ext4: fix circular lock dependency in ext4_ext_migrate Move iput(tmp_inode) after ext4_writepages_up_write() to avoid a circular lock dependency between s_writepages_rwsem and sb_internal (freeze protection). The deadlock scenario: CPU0 (EXT4_IOC_MIGRATE) CPU1 (orphan cleanup during mount) ---- ---- ext4_ext_migrate() ext4_writepages_down_write() s_writepages_rwsem (write) ext4_evict_inode() sb_start_intwrite() [sb_internal] ... ext4_writepages() s_writepages_rwsem (read) [BLOCKED] iput(tmp_inode) ext4_evict_inode() sb_start_intwrite() [BLOCKED] The tmp_inode is a temporary inode with nlink=0 created solely for building the extent tree. Its eviction does not require s_writepages_rwsem protection, so deferring iput() until after releasing the rwsem is safe.

UnknownCVSS not scoredNot KEV-listedUpdatedOct 19, 2026, 09:08 UTC (UTC+00:00)

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Sep 24, 2026, 15:52 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

3Timeline events

0ADP providers

6Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
Sep 17, 2026, 16:02 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
Sep 24, 2026, 15:52 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Oct 19, 2026, 09:08 UTC (UTC+00:00)

Source materials

CVE List V5 sourceCVE List V5
https://git.kernel.org/stable/c/452950461241dfed8b1d32e94b227db38c99c5afCVE reference, Linux
https://git.kernel.org/stable/c/ada23457d4748d6e9c36c6f871fc29a6f558c48cCVE reference, Linux
https://git.kernel.org/stable/c/e4223231b6860141813637a6413c2371ae4d6fa8CVE reference, Linux
https://git.kernel.org/stable/c/32f7ab52875ec7f800ca67e7176e5743a84baddfCVE reference, Linux
https://git.kernel.org/stable/c/a897682793eba5de51ee6f3152760374afa629cfCVE reference, Linux

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

LinuxLinuxcb85f4d23f794e24127f3e562cb3b54b0803f456, cb85f4d23f794e24127f3e562cb3b54b0803f456, cb85f4d23f794e24127f3e562cb3b54b0803f456, cb85f4d23f794e24127f3e562cb3b54b0803f456, cb85f4d23f794e24127f3e562cb3b54b0803f456, eb799e163dc2bc1ea0a4820b66f79d32a5e907df, bcc1eab71a67c46b9e24544ac7923f44444174ce, 8cf20fb73e73a4c4df0328b5297842c5ef34fdd9, e5d25003d059649e18a249635ed5ca7a7b1de5ad, 69f8a7991fd93c49096ddd11574db3e7df238b7b, 4.9.215, 4.14.172, 4.19.107, 5.4.23, 5.5.7unaffected

LinuxLinux5.6, 0, 6.6.157, 6.12.110, 6.18.52, 7.2.6, 7.3affected

Weakness

CWE details

No CWE listed

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