ecryptfs: hold msg ctx list lock when cleaning daemon queue
Priority LOW 33Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: ecryptfs: hold msg ctx list lock when cleaning daemon queue ecryptfs_exorcise_daemon() drops queued messages from a dying daemon without holding ecryptfs_msg_ctx_lists_mux, but ecryptfs_msg_ctx_alloc_to_free() requires that lock. Take the list lock while moving the queued contexts back to the free list to avoid racing with other global msg ctx list users.
Why it matters now
EPSS 0.00176 7th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.270, 5.15.221, 6.1.188 +5Red Hat: 2 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.26 and later | 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4, 7.3 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.26 and later Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4, 7.3 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4, 7.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-89609
- 2026-10-03 Alias added: GHSA-c77f-5fp9-7h2f
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-11-06 Affected versions changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/64d8998e36cfd2bb7114f3af0aa51c5a559a39b3
- https://git.kernel.org/stable/c/4d50b8aea11ad9594c8704a4c647e11311ab7b19
- https://git.kernel.org/stable/c/956541efd125a10442f9514668bc5c852702c93b
- https://git.kernel.org/stable/c/ec1627bcb5b51ddd46b1ef27a9d5a9834abb0a6a
- https://git.kernel.org/stable/c/7e48afafe7abc275f7b6916613bb18b821e7d94a
- https://git.kernel.org/stable/c/0d9636ecba34bd553ecf19049f7705505aea62fd
- https://git.kernel.org/stable/c/4c02acbe0a2692ca9991c51e62bbe6d6b59dac31
- https://git.kernel.org/stable/c/779972513c2fa8c7938e54976f686091dafff22f
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Sources
- CVE-2026-89609 · CVE Program
- CVE-2026-89609 · NVD
- FIRST EPSS
- GHSA-c77f-5fp9-7h2f · GitHub Advisory Database · CC BY 4.0
- CVE-2026-89609 · Red Hat security data · CC BY 4.0
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