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CVE-2026-43328— cpufreq: governor: fix double free in cpufreq_dbs_governor_init() error path

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cpufreq_dbs_governor_init错误路径中双重释放，kobject_put后再次调用exit和kfree。

AI Predicted 4.4 Difficulty: Hard EPSS 0.18% · P7

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 4ebe36c94aed95de71a8ce6a6762226d31c938ee< 56bc91ee78babe9578585a2bc137abc4b3115ff3 affected
4ebe36c94aed95de71a8ce6a6762226d31c938ee< 4b9118e93d2499bb2808ef3742fa0ce06f4f8117 affected
4ebe36c94aed95de71a8ce6a6762226d31c938ee< 019ea28629720c220daedf38107c8787f330dc05 affected
4ebe36c94aed95de71a8ce6a6762226d31c938ee< da39ee627fd82b52068d4d5f115749a8b7d271f9 affected
4ebe36c94aed95de71a8ce6a6762226d31c938ee< 427d048e4f6acbfa01b5a8062449fe0ee8987c0d affected
4ebe36c94aed95de71a8ce6a6762226d31c938ee< d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357 affected
4ebe36c94aed95de71a8ce6a6762226d31c938ee< 3bf9d023d2329a0e5379f2fd09d06ef09729cd9d affected
4ebe36c94aed95de71a8ce6a6762226d31c938ee< 6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1e affected
… +12 more rows
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I. Basic Information for CVE-2026-43328

Vulnerability Information
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Vulnerability Title
cpufreq: governor: fix double free in cpufreq_dbs_governor_init() error path
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: cpufreq: governor: fix double free in cpufreq_dbs_governor_init() error path When kobject_init_and_add() fails, cpufreq_dbs_governor_init() calls kobject_put(&dbs_data->attr_set.kobj). The kobject release callback cpufreq_dbs_data_release() calls gov->exit(dbs_data) and kfree(dbs_data), but the current error path then calls gov->exit(dbs_data) and kfree(dbs_data) again, causing a double free. Keep the direct kfree(dbs_data) for the gov->init() failure path, but after kobject_init_and_add() has been called, let kobject_put() handle the cleanup through cpufreq_dbs_data_release().
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cpufreq_dbs_governor_init错误路径中双重释放，kobject_put后再次调用exit和kfree。
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 4ebe36c94aed95de71a8ce6a6762226d31c938ee ~ 56bc91ee78babe9578585a2bc137abc4b3115ff3 -
Linux Linux 5.2 -

II. Public POCs for CVE-2026-43328

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III. Intelligence Information for CVE-2026-43328

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Patches & Fixes for CVE-2026-43328 (8)

Same Patch Batch · Linux · 2026-05-08 · 197 CVEs total

CVE-2026-43341 9.8 CRITICAL net/ipv6: ioam6: prevent schema length wraparound in trace fill
CVE-2026-43402 9.8 CRITICAL kthread: consolidate kthread exit paths to prevent use-after-free
CVE-2026-43414 9.8 CRITICAL scsi: qla2xxx: Completely fix fcport double free
CVE-2026-43384 9.8 CRITICAL net/tcp-ao: Fix MAC comparison to be constant-time
CVE-2026-43304 9.8 CRITICAL libceph: define and enforce CEPH_MAX_KEY_LEN
CVE-2026-43379 9.8 CRITICAL ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()
CVE-2026-43376 9.8 CRITICAL ksmbd: fix use-after-free by using call_rcu() for oplock_info
CVE-2026-43465 9.8 CRITICAL net/mlx5e: RX, Fix XDP multi-buf frag counting for striding RQ
CVE-2026-43378 9.8 CRITICAL smb: server: fix use-after-free in smb2_open()
CVE-2026-43383 9.4 CRITICAL net/tcp-md5: Fix MAC comparison to be constant-time
CVE-2026-43406 9.1 CRITICAL libceph: prevent potential out-of-bounds reads in process_message_header()
CVE-2026-43407 9.1 CRITICAL libceph: Fix potential out-of-bounds access in ceph_handle_auth_reply()
CVE-2026-43284 8.8 HIGH xfrm: esp: avoid in-place decrypt on shared skb frags
CVE-2026-43334 8.8 HIGH Bluetooth: SMP: force responder MITM requirements before building the pairing response
CVE-2026-43322 8.8 HIGH Bluetooth: hci_sync: Fix UAF in le_read_features_complete
CVE-2026-43403 8.8 HIGH nsfs: tighten permission checks for ns iteration ioctls
CVE-2026-43391 8.8 HIGH nsfs: tighten permission checks for handle opening
CVE-2026-43291 8.3 HIGH net: nfc: nci: Fix parameter validation for packet data
CVE-2026-43365 8.2 HIGH xfs: fix undersized l_iclog_roundoff values
CVE-2026-43466 8.2 HIGH net/mlx5e: Fix DMA FIFO desync on error CQE SQ recovery

Showing top 20 of 197 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43328

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