CVE-2025-21679— btrfs: add the missing error handling inside get_canonical_dev_path
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I. Basic Information for CVE-2025-21679
Vulnerability Information
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Vulnerability Title
btrfs: add the missing error handling inside get_canonical_dev_path
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: add the missing error handling inside get_canonical_dev_path Inside function get_canonical_dev_path(), we call d_path() to get the final device path. But d_path() can return error, and in that case the next strscpy() call will trigger an invalid memory access. Add back the missing error handling for d_path().
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get_canonical_dev_path函数中对d_path的返回值未进行错误处理，导致在d_path返回错误时，后续的strscpy调用可能访问无效内存，引发系统崩溃。
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-2025-21679
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Patch · 2
Same Patch Batch · Linux · 2025-01-31 · 20 CVEs total
| CVE-2025-21673 | smb: client: fix double free of TCP_Server_Info::hostname | |
| CVE-2024-57948 | mac802154: check local interfaces before deleting sdata list | |
| CVE-2025-21665 | filemap: avoid truncating 64-bit offset to 32 bits | |
| CVE-2025-21666 | vsock: prevent null-ptr-deref in vsock_*[has_data|has_space] | |
| CVE-2025-21667 | iomap: avoid avoid truncating 64-bit offset to 32 bits | |
| CVE-2025-21668 | pmdomain: imx8mp-blk-ctrl: add missing loop break condition | |
| CVE-2025-21669 | vsock/virtio: discard packets if the transport changes | |
| CVE-2025-21670 | vsock/bpf: return early if transport is not assigned | |
| CVE-2025-21671 | zram: fix potential UAF of zram table | |
| CVE-2025-21672 | afs: Fix merge preference rule failure condition | |
| CVE-2025-21683 | bpf: Fix bpf_sk_select_reuseport() memory leak | |
| CVE-2025-21674 | net/mlx5e: Fix inversion dependency warning while enabling IPsec tunnel | |
| CVE-2025-21675 | net/mlx5: Clear port select structure when fail to create | |
| CVE-2025-21676 | net: fec: handle page_pool_dev_alloc_pages error | |
| CVE-2025-21677 | pfcp: Destroy device along with udp socket's netns dismantle. | |
| CVE-2025-21678 | gtp: Destroy device along with udp socket's netns dismantle. | |
| CVE-2025-21681 | openvswitch: fix lockup on tx to unregistering netdev with carrier | |
| CVE-2025-21680 | pktgen: Avoid out-of-bounds access in get_imix_entries | |
| CVE-2025-21682 | eth: bnxt: always recalculate features after XDP clearing, fix null-deref |
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects - CVE-2026-43499
rtmutex: Use waiter::task instead of current in remove_waite - CVE-2026-43497
fbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-aft
Same vendor: Linux
- CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects - CVE-2026-43499
rtmutex: Use waiter::task instead of current in remove_waite - CVE-2026-43497
fbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-aft
V. Comments for CVE-2025-21679
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