GHSA-PF6P-PJXV-JWQH
Vulnerability from github – Published: 2025-02-27 03:34 – Updated: 2025-03-13 15:32In 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
{
"affected": [],
"aliases": [
"CVE-2025-21755"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-27T03:15:16Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock: Orphan socket after transport release\n\nDuring socket release, sock_orphan() is called without considering that it\nsets sk-\u003esk_wq to NULL. Later, if SO_LINGER is enabled, this leads to a\nnull pointer dereferenced in virtio_transport_wait_close().\n\nOrphan the socket only after transport release.\n\nPartially reverts the \u0027Fixes:\u0027 commit.\n\nKASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]\n lock_acquire+0x19e/0x500\n _raw_spin_lock_irqsave+0x47/0x70\n add_wait_queue+0x46/0x230\n virtio_transport_release+0x4e7/0x7f0\n __vsock_release+0xfd/0x490\n vsock_release+0x90/0x120\n __sock_release+0xa3/0x250\n sock_close+0x14/0x20\n __fput+0x35e/0xa90\n __x64_sys_close+0x78/0xd0\n do_syscall_64+0x93/0x1b0\n entry_SYSCALL_64_after_hwframe+0x76/0x7e",
"id": "GHSA-pf6p-pjxv-jwqh",
"modified": "2025-03-13T15:32:50Z",
"published": "2025-02-27T03:34:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21755"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3a866f8376f0a5c848dcb59cd26df845fffbe6d8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/631e00fdac7acca676103d6cbc96eb152625f449"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/78dafe1cf3afa02ed71084b350713b07e72a18fb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/94d81870eec7ad2dd7af80bffd314ded26caea1a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bab61f41c942a20ef7b4feea50e9d36d19ad1a26"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c6acb650a73d5705a93b9c5a2cd5e9c8161f0be3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f3b8e9d3414b2eb083d8293be25a949fe480897b"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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