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CVE-2026-89605— ecryptfs: release message context on send failure

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 2.6.26版本及7.3-rc1之前版本存在安全漏洞，该漏洞源于ecryptfs在向用户空间守护进程发送消息失败时未释放消息上下文，导致已分配的消息上下文无法重用。

CVSS 7.8 · High EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1566.001 · Spearphishing Attachment

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux f66e883eb6186bc43a79581b67aff7d1a69d0ff1< 177e0c32fec3602bb3b64139bb8bb610cd6722c7 affected
f66e883eb6186bc43a79581b67aff7d1a69d0ff1< 743e7aeb9575c0838d8996d40d81a6b8fa5cd060 affected
f66e883eb6186bc43a79581b67aff7d1a69d0ff1< 590fc6140e29c54d2f7839eb9df78d106ee1905e affected
f66e883eb6186bc43a79581b67aff7d1a69d0ff1< 30845ed227475a11a49ccce047837d016b7e0f49 affected
f66e883eb6186bc43a79581b67aff7d1a69d0ff1< 47ce611cb13f0eefa550d5434c1afcd4217bfc3e affected
f66e883eb6186bc43a79581b67aff7d1a69d0ff1< 9319706316a8e79f374627554386d575a84b637f affected
f66e883eb6186bc43a79581b67aff7d1a69d0ff1< 654b7e79443f5ea90849f5c1cf70c0d94bd5b10e affected
f66e883eb6186bc43a79581b67aff7d1a69d0ff1< 219644a3ad5518217b2d62cad6d2c36a2308c949 affected
… +10 more rows
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I. Basic Information for CVE-2026-89605

Vulnerability Information
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Vulnerability Title
ecryptfs: release message context on send failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ecryptfs: release message context on send failure ecryptfs_send_message_locked() moves a message context from the free list to the allocated list before sending the request to the userspace daemon. If ecryptfs_send_miscdev() fails, the context is left on the allocated list and cannot be reused. Move it back to the free list on failure and clear the caller's pointer.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 2.6.26版本及7.3-rc1之前版本存在安全漏洞，该漏洞源于ecryptfs在向用户空间守护进程发送消息失败时未释放消息上下文，导致已分配的消息上下文无法重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux f66e883eb6186bc43a79581b67aff7d1a69d0ff1 ~ 177e0c32fec3602bb3b64139bb8bb610cd6722c7 -
Linux Linux 2.6.26 -

II. Public POCs for CVE-2026-89605

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III. Intelligence Information for CVE-2026-89605

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Patches & Fixes for CVE-2026-89605 (8)

Same Patch Batch · Linux · 2026-09-11 · 431 CVEs total

CVE-2026-89688 9.8 CRITICAL nfsd: drop the stateid, not the stateowner, on seqid_op replay retry
CVE-2026-89656 9.8 CRITICAL libceph: reject buckets with mismatched CRUSH ids
CVE-2026-89655 9.8 CRITICAL ceph: fix UAF in __kick_flushing_caps() on cf entry freed during unlock
CVE-2026-89658 9.8 CRITICAL NFSD: Prevent client use-after-free during NFSv4.0 revoked-state cleanup
CVE-2026-89660 9.8 CRITICAL NFSD: Prevent client use-after-free during admin state revocation
CVE-2026-89659 9.8 CRITICAL NFSD: Prevent client use-after-free during delegation revoke
CVE-2026-89662 9.8 CRITICAL NFSD: Prevent lock owner use-after-free during client teardown
CVE-2026-89669 9.8 CRITICAL nfsd: initialize copy-notify stateid before publishing it
CVE-2026-89674 9.8 CRITICAL nfsd: fix XDR length calculation in nfsd4_ff_encode_layoutget
CVE-2026-89675 9.8 CRITICAL nfsd: fix UAF in async copy cancel and shutdown
CVE-2026-89676 9.8 CRITICAL nfsd: fix stale s2s_cp_stateids IDR entry for async COPY
CVE-2026-89677 9.8 CRITICAL nfsd: fix possible fh_compose of wrong dentry in nfsd4_create_file()
CVE-2026-89681 9.8 CRITICAL nfsd: fix layout fence worker double-reference race
CVE-2026-89686 9.8 CRITICAL nfsd: fix BUG_ON in nfsd4_alloc_layout_stateid on racing delegation revoke
CVE-2026-89703 9.8 CRITICAL nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations
CVE-2026-89479 9.8 CRITICAL sctp: stop processing a packet once its association is deleted
CVE-2026-89478 9.8 CRITICAL sctp: drop a chunk if its transport was removed
CVE-2026-89702 9.8 CRITICAL nfsd: size fh_verify server sockaddr slot by xpt_locallen
CVE-2026-89482 9.8 CRITICAL nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone
CVE-2026-89708 9.8 CRITICAL nfsd: RCU-protect cl_cb_session to fix use-after-free on session teardown

Showing top 20 of 431 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-89605

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