CVE - CVE-2025-21755

CVE-ID
CVE-2025-21755	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: vsock: Orphan socket after transport release During socket release, sock_orphan() is called without considering that it sets sk->sk_wq to NULL. Later, if SO_LINGER is enabled, this leads to a null pointer dereferenced in virtio_transport_wait_close(). Orphan the socket only after transport release. Partially reverts the 'Fixes:' commit. KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] lock_acquire+0x19e/0x500 _raw_spin_lock_irqsave+0x47/0x70 add_wait_queue+0x46/0x230 virtio_transport_release+0x4e7/0x7f0 __vsock_release+0xfd/0x490 vsock_release+0x90/0x120 __sock_release+0xa3/0x250 sock_close+0x14/0x20 __fput+0x35e/0xa90 __x64_sys_close+0x78/0xd0 do_syscall_64+0x93/0x1b0 entry_SYSCALL_64_after_hwframe+0x76/0x7e
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/3a866f8376f0a5c848dcb59cd26df845fffbe6d8 URL:https://git.kernel.org/stable/c/3a866f8376f0a5c848dcb59cd26df845fffbe6d8 MISC:https://git.kernel.org/stable/c/78dafe1cf3afa02ed71084b350713b07e72a18fb URL:https://git.kernel.org/stable/c/78dafe1cf3afa02ed71084b350713b07e72a18fb MISC:https://git.kernel.org/stable/c/94d81870eec7ad2dd7af80bffd314ded26caea1a URL:https://git.kernel.org/stable/c/94d81870eec7ad2dd7af80bffd314ded26caea1a MISC:https://git.kernel.org/stable/c/f3b8e9d3414b2eb083d8293be25a949fe480897b URL:https://git.kernel.org/stable/c/f3b8e9d3414b2eb083d8293be25a949fe480897b
Assigning CNA
kernel.org
Date Record Created
20241229	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241229)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)