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CVE-2026-89989— ima: Check for ERR_PTR from dentry_path() in validate_hash_algo()

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 内核中已修复以下漏洞： IMA：在 中检查 返回的错误指针 当路径长度超过缓冲区大小时， 会返回 。然而， 未检查该返回值，而是直接将其传递给 。由于 并非 ， 会将其视为有效指针并对之调用 ，从而触发页错误（page fault）： 修复方法是检查 并改用 ，这样审计消息在遇到错误路径时会跳过 字段，而不会导致内核崩溃。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 4f2946aa0c45c78b4f4ef101bab9694e38c68db0< d6fade89903c8fd0af6c956242aec8b927040e02 affected
4f2946aa0c45c78b4f4ef101bab9694e38c68db0< 0de5b525c0cd7d202848b8adfde3c01c287fb1a6 affected
4f2946aa0c45c78b4f4ef101bab9694e38c68db0< 30b5c0e17dcad72b6b2f987319aa645570e6376d affected
4f2946aa0c45c78b4f4ef101bab9694e38c68db0< 9e69d683ebd7def04557fe758ff123105d7d9840 affected
4f2946aa0c45c78b4f4ef101bab9694e38c68db0< f8a2f2a4602318eb93d49d27fd0d0fdaab17edde affected
4f2946aa0c45c78b4f4ef101bab9694e38c68db0< d62a84a78de5f29c642fa3bd4eee072ba7289cb4 affected
4f2946aa0c45c78b4f4ef101bab9694e38c68db0< 8861f6d5c0678a7c5089c7b272509fc5931b8437 affected
5.15 affected
… +8 more rows
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I. Basic Information for CVE-2026-89989

Vulnerability Information
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Vulnerability Title
ima: Check for ERR_PTR from dentry_path() in validate_hash_algo()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ima: Check for ERR_PTR from dentry_path() in validate_hash_algo() dentry_path() returns ERR_PTR(-ENAMETOOLONG) when the path exceeds the buffer. validate_hash_algo() passes the result straight to integrity_audit_msg() without checking. ERR_PTR is not NULL, so integrity_audit_message() sees a valid pointer and calls strlen() on it, which faults: BUG: unable to handle page fault for address: ffffffffffffffdc RIP: 0010:strlen+0x30/0xa0 Call Trace: audit_log_untrustedstring+0x19/0x30 integrity_audit_message+0x366/0x4f0 ima_inode_setxattr+0x512/0x5f0 Check for IS_ERR() and use NULL instead, which makes the audit message skip the name= field instead of crashing.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 4f2946aa0c45c78b4f4ef101bab9694e38c68db0 ~ d6fade89903c8fd0af6c956242aec8b927040e02 -
Linux Linux 5.15 -

II. Public POCs for CVE-2026-89989

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III. Intelligence Information for CVE-2026-89989

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Other References for CVE-2026-89989 (7)

Same Patch Batch · Linux · 2026-09-16 · 276 CVEs total

CVE-2026-90048 9.8 CRITICAL fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_list()
CVE-2026-90012 9.8 CRITICAL spi: Fix DMA mapping ownership on partial map failure
CVE-2026-89970 9.8 CRITICAL nvmet-auth: Synchronize timeout work during SQ teardown
CVE-2026-89857 9.8 CRITICAL scsi: qla2xxx: Hold qpair lock when sending NVMe LS reject
CVE-2026-89969 9.8 CRITICAL nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU
CVE-2026-89847 9.8 CRITICAL scsi: qla2xxx: Avoid double completion in async IOCB timeout
CVE-2026-89972 9.8 CRITICAL nvme: add missing SRCU grace period in error path
CVE-2026-89990 9.8 CRITICAL ceph: lock mutex in ceph_mds_check_access()
CVE-2026-90036 9.8 CRITICAL NFSD: Prevent client use-after-free during blocked-lock reaping
CVE-2026-90038 9.8 CRITICAL NFSD: Prevent client use-after-free during export state revocation
CVE-2026-90037 9.8 CRITICAL NFSD: Prevent client use-after-free during close_lru reaping
CVE-2026-89788 9.8 CRITICAL ksmbd: fix tree connection use-after-free in smb2_tree_connect()
CVE-2026-89783 9.8 CRITICAL xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full
CVE-2026-90042 9.8 CRITICAL ceph: properly decrypt filenames in vmalloc() buffers
CVE-2026-89778 9.8 CRITICAL isofs: fix out-of-bounds page array access on empty zisofs block
CVE-2026-89915 9.3 CRITICAL KVM: arm64: Remove VM-wide VNCR mapping counter
CVE-2026-90049 9.3 CRITICAL net: skbuff: don't skb_tx_error() the source skb in skb_zerocopy()
CVE-2026-89775 9.3 CRITICAL KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation
CVE-2026-89916 9.3 CRITICAL KVM: arm64: Make VNCR invalidation participate in MMU invalidation retry
CVE-2026-89930 9.3 CRITICAL KVM: nVMX: Service local TLB flushes on failed nested VM-Enter

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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