CVE-2026-45948— ext4: fix memory leak in ext4_ext_shift_extents()
Possible ATT&CK Techniques 1AI
T1005 · Data from Local SystemAffected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | a18ed359bdddcded4f97ff5e2f07793ff9336913< 7e807cb8603b7664fa630a696cd891d9a03c248d | affected |
a18ed359bdddcded4f97ff5e2f07793ff9336913< afc5e61e1a07b2b833bd72cbee36ecce9cd901e2 | affected | ||
a18ed359bdddcded4f97ff5e2f07793ff9336913< 1bce219ee5512cf179ba40cf114945a14a16e21f | affected | ||
a18ed359bdddcded4f97ff5e2f07793ff9336913< 4a79fde8db7eba7f1128d971ceba4e3c9ac84aec | affected | ||
a18ed359bdddcded4f97ff5e2f07793ff9336913< 2f4b1052246ca646bb17bfe0f53df2fdf9729b58 | affected | ||
a18ed359bdddcded4f97ff5e2f07793ff9336913< 12615ab4bfb69678e5d961b28bb70040299e51b1 | affected | ||
a18ed359bdddcded4f97ff5e2f07793ff9336913< bd7b52557e4a3ccd7595fdb3a585f1257de57935 | affected | ||
a18ed359bdddcded4f97ff5e2f07793ff9336913< ca81109d4a8f192dc1cbad4a1ee25246363c2833 | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2026-45948
Vulnerability Information
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Vulnerability Title
ext4: fix memory leak in ext4_ext_shift_extents()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ext4: fix memory leak in ext4_ext_shift_extents() In ext4_ext_shift_extents(), if the extent is NULL in the while loop, the function returns immediately without releasing the path obtained via ext4_find_extent(), leading to a memory leak. Fix this by jumping to the out label to ensure the path is properly released.
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_ext_shift_extents()函数在while循环中遇到空extent时未释放路径，可能导致内存泄漏。
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
II. Public POCs for CVE-2026-45948
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-45948 (8)
Same Patch Batch · Linux · 2026-05-27 · 276 CVEs total
| CVE-2026-46039 | 9.8 CRITICAL | rxgk: Fix potential integer overflow in length check |
| CVE-2026-45898 | 9.8 CRITICAL | RDMA/iwcm: Fix workqueue list corruption by removing work_list |
| CVE-2026-45988 | 9.8 CRITICAL | rxrpc: Fix re-decryption of RESPONSE packets |
| CVE-2026-45972 | 9.8 CRITICAL | smb: client: fix potential UAF and double free in smb2_open_file() |
| CVE-2026-46043 | 9.1 CRITICAL | RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv |
| CVE-2026-46056 | 8.8 HIGH | Bluetooth: hci_event: fix potential UAF in SSP passkey handlers |
| CVE-2026-45945 | 8.8 HIGH | iommu/vt-d: Fix race condition during PASID entry replacement |
| CVE-2026-45843 | 8.2 HIGH | slip: bound decode() reads against the compressed packet length |
| CVE-2026-46037 | 8.2 HIGH | ipv4: icmp: validate reply type before using icmp_pointers |
| CVE-2026-46010 | 8.1 HIGH | rxrpc: Fix error handling in rxgk_extract_token() |
| CVE-2026-46099 | 8.1 HIGH | net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels |
| CVE-2026-46076 | 7.9 HIGH | KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1 |
| CVE-2026-45894 | 7.8 HIGH | iommu/vt-d: Clear Present bit before tearing down PASID entry |
| CVE-2026-45959 | 7.8 HIGH | crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree |
| CVE-2026-46011 | 7.8 HIGH | media: mtk-jpeg: fix use-after-free in release path due to uncancelled work |
| CVE-2026-46015 | 7.8 HIGH | tcp: call sk_data_ready() after listener migration |
| CVE-2026-45852 | 7.8 HIGH | RDMA/rxe: Fix double free in rxe_srq_from_init |
| CVE-2026-46058 | 7.8 HIGH | media: amphion: Fix race between m2m job_abort and device_run |
| CVE-2026-45861 | 7.8 HIGH | gfs2: Fix slab-use-after-free in qd_put |
| CVE-2026-46053 | 7.8 HIGH | net: rds: fix MR cleanup on copy error |
Showing top 20 of 276 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46243
smb: client: reject userspace cifs.spnego descriptions - CVE-2026-46242
eventpoll: fix ep_remove struct eventpoll / struct file UAF - CVE-2026-46241
spi: mpc52xx: fix use-after-free on registration failure - CVE-2026-46239
media: i2c: ov5647: Fix runtime PM refcount leak in s_ctrl - CVE-2026-46240
media: iris: Fix use-after-free in iris_release_internal_buf
Same vendor: Linux
- CVE-2026-46243
smb: client: reject userspace cifs.spnego descriptions - CVE-2026-46242
eventpoll: fix ep_remove struct eventpoll / struct file UAF - CVE-2026-46241
spi: mpc52xx: fix use-after-free on registration failure - CVE-2026-46239
media: i2c: ov5647: Fix runtime PM refcount leak in s_ctrl - CVE-2026-46240
media: iris: Fix use-after-free in iris_release_internal_buf
V. Comments for CVE-2026-45948
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