Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-43066— ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths

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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ext4_fc_replay_inode函数在错误路径中未释放iloc.bh，可能导致资源泄漏。

AI Predicted 3.3 Difficulty: Hard EPSS 0.16% · P5

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2< 0892f12cd49fde5d5db68137923db107f894f3a3 affected
8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2< 5a63033696e60b5d70816f1d119645ac5b0b0a03 affected
8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2< 9c90449a9ac2cd1ba540ad2561b8b70c1bfb0a25 affected
8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2< ca99cbcc316cdfd2040cc2b13d1426ccb3b3b50b affected
8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2< 19782b4c793b49a6aa4abbb307ddff3610009d21 affected
8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2< f7817ad399d604e8639005d87d148b5ec626ad26 affected
8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2< c426231e3d51916e83b6d1ab7ed8a65e83bca5b4 affected
8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2< ec0a7500d8eace5b4f305fa0c594dd148f0e8d29 affected
… +10 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-43066

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths During code review, Joseph found that ext4_fc_replay_inode() calls ext4_get_fc_inode_loc() to get the inode location, which holds a reference to iloc.bh that must be released via brelse(). However, several error paths jump to the 'out' label without releasing iloc.bh: - ext4_handle_dirty_metadata() failure - sync_dirty_buffer() failure - ext4_mark_inode_used() failure - ext4_iget() failure Fix this by introducing an 'out_brelse' label placed just before the existing 'out' label to ensure iloc.bh is always released. Additionally, make ext4_fc_replay_inode() propagate errors properly instead of always returning 0.
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
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ext4_fc_replay_inode函数在错误路径中未释放iloc.bh，可能导致资源泄漏。
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 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 ~ 0892f12cd49fde5d5db68137923db107f894f3a3 -
Linux Linux 5.10 -

II. Public POCs for CVE-2026-43066

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-43066

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-43066 (8)

Same Patch Batch · Linux · 2026-05-05 · 15 CVEs total

CVE-2026-43067 9.8 CRITICAL ext4: handle wraparound when searching for blocks for indirect mapped blocks
CVE-2026-43071 9.1 CRITICAL dcache: Limit the minimal number of bucket to two
CVE-2026-43070 7.8 HIGH bpf: Reset register ID for BPF_END value tracking
CVE-2026-43063 7.8 HIGH xfs: don't irele after failing to iget in xfs_attri_recover_work
CVE-2026-43060 7.8 HIGH netfilter: nft_ct: drop pending enqueued packets on removal
CVE-2026-43062 7.1 HIGH Bluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()
CVE-2026-43073 x86-64: rename misleadingly named '__copy_user_nocache()' function
CVE-2026-43072 drm/vc4: platform_get_irq_byname() returns an int
CVE-2026-43069 Bluetooth: hci_ll: Fix firmware leak on error path
CVE-2026-43068 ext4: avoid allocate block from corrupted group in ext4_mb_find_by_goal()
CVE-2026-43065 ext4: always drain queued discard work in ext4_mb_release()
CVE-2026-43064 dmaengine: idxd: Fix not releasing workqueue on .release()
CVE-2026-43061 serial: 8250: Fix TX deadlock when using DMA
CVE-2026-43059 Bluetooth: MGMT: Fix list corruption and UAF in command complete handlers

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43066

No comments yet

Leave a comment