What’s Vulnerable › Vulnerabilities

CVE-2026-89609: ecryptfs: hold msg ctx list lock when cleaning daemon queue

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-11 · updated 2026-10-19

Description

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.

Affected products

• Linux kernel: 2.6.26 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0d9636ecba34bd553ecf19049f7705505aea62fd
• https://git.kernel.org/stable/c/4c02acbe0a2692ca9991c51e62bbe6d6b59dac31
• https://git.kernel.org/stable/c/4d50b8aea11ad9594c8704a4c647e11311ab7b19
• https://git.kernel.org/stable/c/64d8998e36cfd2bb7114f3af0aa51c5a559a39b3
• https://git.kernel.org/stable/c/779972513c2fa8c7938e54976f686091dafff22f
• https://git.kernel.org/stable/c/7e48afafe7abc275f7b6916613bb18b821e7d94a
• https://git.kernel.org/stable/c/956541efd125a10442f9514668bc5c852702c93b
• https://git.kernel.org/stable/c/ec1627bcb5b51ddd46b1ef27a9d5a9834abb0a6a

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