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CVE-2025-21671— zram: fix potential UAF of zram table

EPSS 0.02% · P6
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I. Basic Information for CVE-2025-21671

Vulnerability Information
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Vulnerability Title
zram: fix potential UAF of zram table
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: zram: fix potential UAF of zram table If zram_meta_alloc failed early, it frees allocated zram->table without setting it NULL. Which will potentially cause zram_meta_free to access the table if user reset an failed and uninitialized device.
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 资源管理错误漏洞
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存在资源管理错误漏洞，该漏洞源于zram_meta_alloc函数在分配失败时未将zram->table设置为NULL，可能导致在设备未正确初始化时访问已释放的内存。
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 ac3b5366b9b7c9d97b606532ceab43d2329a22f3 ~ fe3de867f94819ba0f28e035c0b0182150147d95 -
LinuxLinux 6.1.122 ~ 6.1.127 -

II. Public POCs for CVE-2025-21671

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III. Intelligence Information for CVE-2025-21671

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Same Patch Batch · Linux · 2025-01-31 · 20 CVEs total

CVE-2025-21674net/mlx5e: Fix inversion dependency warning while enabling IPsec tunnel
CVE-2024-57948mac802154: check local interfaces before deleting sdata list
CVE-2025-21665filemap: avoid truncating 64-bit offset to 32 bits
CVE-2025-21666vsock: prevent null-ptr-deref in vsock_*[has_data|has_space]
CVE-2025-21667iomap: avoid avoid truncating 64-bit offset to 32 bits
CVE-2025-21668pmdomain: imx8mp-blk-ctrl: add missing loop break condition
CVE-2025-21669vsock/virtio: discard packets if the transport changes
CVE-2025-21670vsock/bpf: return early if transport is not assigned
CVE-2025-21672afs: Fix merge preference rule failure condition
CVE-2025-21673smb: client: fix double free of TCP_Server_Info::hostname
CVE-2025-21683bpf: Fix bpf_sk_select_reuseport() memory leak
CVE-2025-21675net/mlx5: Clear port select structure when fail to create
CVE-2025-21676net: fec: handle page_pool_dev_alloc_pages error
CVE-2025-21677pfcp: Destroy device along with udp socket's netns dismantle.
CVE-2025-21679btrfs: add the missing error handling inside get_canonical_dev_path
CVE-2025-21678gtp: Destroy device along with udp socket's netns dismantle.
CVE-2025-21681openvswitch: fix lockup on tx to unregistering netdev with carrier
CVE-2025-21680pktgen: Avoid out-of-bounds access in get_imix_entries
CVE-2025-21682eth: bnxt: always recalculate features after XDP clearing, fix null-deref

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21671

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