VulnerabilityPublished 25 Jun 2026Updated 21 Oct 2026

CVE-2026-53272: Linux kernel · erofs: fix use-after-free on sbi->sync_decompress

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in 95caf60da33d87ed26c28993620f0d92487b0296 : 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 95caf60da33d87ed26c28993620f0d92487b0296, 86ab00cf81d44b675bb23db62b88fd76c8ac8cea, 59db5d8bcc65e04d8598afd81ec3a18edb407470 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Jun 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 to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 40452ffca3c1a0f2994e826f9fa213b107f1a2d4, < 95caf60da33d87ed26c28993620f0d92487b0296	Fixed in 95caf60da33d87ed26c28993620f0d92487b0296
LinuxLinux	Affected ≥ 40452ffca3c1a0f2994e826f9fa213b107f1a2d4, < 86ab00cf81d44b675bb23db62b88fd76c8ac8cea	Fixed in 86ab00cf81d44b675bb23db62b88fd76c8ac8cea
LinuxLinux	Affected ≥ 40452ffca3c1a0f2994e826f9fa213b107f1a2d4, < 59db5d8bcc65e04d8598afd81ec3a18edb407470	Fixed in 59db5d8bcc65e04d8598afd81ec3a18edb407470
LinuxLinux	Affected ≥ 40452ffca3c1a0f2994e826f9fa213b107f1a2d4, < 1aee05e814d292064bf5fa15733741040cdc48ba	Fixed in 1aee05e814d292064bf5fa15733741040cdc48ba
LinuxLinux	Affected ≥ 40452ffca3c1a0f2994e826f9fa213b107f1a2d4, < 00bf6868df65fa95b3854996246d15759fdc7070	Fixed in 00bf6868df65fa95b3854996246d15759fdc7070
LinuxLinux	Affected =5.17	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: erofs: fix use-after-free on sbi->sync_decompress z_erofs_decompress_kickoff() can race with filesystem unmount, causing a use-after-free on sbi->sync_decompress. When I/O completes, z_erofs_endio() calls z_erofs_decompress_kickoff() to queue z_erofs_decompressqueue_work() asynchronously. Then, after all folios are unlocked, unmount workflow can proceed and sbi will be freed before accessing to sbi->sync_decompress. Thread (unmount) I/O completion kworker queue_work z_erofs_decompressqueue_work (all folios are unlocked) cleanup_mnt .. erofs_kill_sb erofs_sb_free kfree(sbi) access sbi->sync_decompress // UAF!!

References

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