CVE record · CVE-2026-89647

ceph: do not repeat ceph_trim_dentries() if no progress possible

CVSS 7.5 HighEPSS 0.0067 · 52nd percentile

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:45 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Linux	Linux	affected 37c4efc1ddf98ba8b234d116d863a9464445901e to before f2f6daf8e99e15d636b1706bb4efd9a856195324 git affected 37c4efc1ddf98ba8b234d116d863a9464445901e to before dd2e9824e5e7dba406005ff779a107f773175a76 git affected 37c4efc1ddf98ba8b234d116d863a9464445901e to before 5a541eb401acb89d791da41189d7a79220164b93 git affected 37c4efc1ddf98ba8b234d116d863a9464445901e to before 37d6edb2f03b29399a3a337fae78674de51e1695 git affected 37c4efc1ddf98ba8b234d116d863a9464445901e to before 3d122b2feb1dd76bb5041bdea5e1e1b007d8d415 git affected 37c4efc1ddf98ba8b234d116d863a9464445901e to before e7d7aa7b730178278109c41fa1b17b06873065d5 git Other versions: unaffected
Linux	Linux	affected 5.1 unaffected before 5.1 semver unaffected 6.1.191 to 6.1., inclusive semver unaffected 6.6.160 to 6.6., inclusive semver unaffected 6.12.109 to 6.12., inclusive semver unaffected 6.18.50 to 6.18., inclusive semver unaffected 7.2.4 to 7.2., inclusive semver unaffected 7.3 to , inclusive original_commit_for_fix Other versions: affected

Identifiers: CVE-2026-89647
CNA: Linux
Tags: Linux kernel
Published: 11 Sept 2026
Updated: 30 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The Linux kernel's ceph filesystem client is affected from version 5.1 until fixed in 6.1.191, 6.6.160, 6.12.109, 6.18.50, or later stable releases. A busy loop in cap reclaim can consume CPU without making progress. The source gives no details on attacker requirements. Upgrade to a fixed kernel version.

Written 12 Nov 2026.

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CNA (Linux)

CISA KEV Not listed.
EPSS 0.0067, the 52nd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 11 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.