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

EPSS 0.02% · P7
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I. Basic Information for CVE-2026-43066

Vulnerability Information
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Vulnerability Title
ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 ~ 0892f12cd49fde5d5db68137923db107f894f3a3 -
LinuxLinux 5.10 -

II. Public POCs for CVE-2026-43066

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III. Intelligence Information for CVE-2026-43066

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

CVE-2026-430679.8 CRITICALext4: handle wraparound when searching for blocks for indirect mapped blocks
CVE-2026-430719.1 CRITICALdcache: Limit the minimal number of bucket to two
CVE-2026-430707.8 HIGHbpf: Reset register ID for BPF_END value tracking
CVE-2026-430637.8 HIGHxfs: don't irele after failing to iget in xfs_attri_recover_work
CVE-2026-430607.8 HIGHnetfilter: nft_ct: drop pending enqueued packets on removal
CVE-2026-430627.1 HIGHBluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()
CVE-2026-43073x86-64: rename misleadingly named '__copy_user_nocache()' function
CVE-2026-43072drm/vc4: platform_get_irq_byname() returns an int
CVE-2026-43069Bluetooth: hci_ll: Fix firmware leak on error path
CVE-2026-43068ext4: avoid allocate block from corrupted group in ext4_mb_find_by_goal()
CVE-2026-43065ext4: always drain queued discard work in ext4_mb_release()
CVE-2026-43064dmaengine: idxd: Fix not releasing workqueue on .release()
CVE-2026-43061serial: 8250: Fix TX deadlock when using DMA
CVE-2026-43059Bluetooth: MGMT: Fix list corruption and UAF in command complete handlers

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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