ghsa-7m24-gr82-qg53
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
kcm: annotate data-races around kcm->rx_wait
kcm->rx_psock can be read locklessly in kcm_rfree(). Annotate the read and writes accordingly.
syzbot reported:
BUG: KCSAN: data-race in kcm_rcv_strparser / kcm_rfree
write to 0xffff88810784e3d0 of 1 bytes by task 1823 on cpu 1: reserve_rx_kcm net/kcm/kcmsock.c:283 [inline] kcm_rcv_strparser+0x250/0x3a0 net/kcm/kcmsock.c:363 __strp_recv+0x64c/0xd20 net/strparser/strparser.c:301 strp_recv+0x6d/0x80 net/strparser/strparser.c:335 tcp_read_sock+0x13e/0x5a0 net/ipv4/tcp.c:1703 strp_read_sock net/strparser/strparser.c:358 [inline] do_strp_work net/strparser/strparser.c:406 [inline] strp_work+0xe8/0x180 net/strparser/strparser.c:415 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289 worker_thread+0x618/0xa70 kernel/workqueue.c:2436 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
read to 0xffff88810784e3d0 of 1 bytes by task 17869 on cpu 0: kcm_rfree+0x121/0x220 net/kcm/kcmsock.c:181 skb_release_head_state+0x8e/0x160 net/core/skbuff.c:841 skb_release_all net/core/skbuff.c:852 [inline] __kfree_skb net/core/skbuff.c:868 [inline] kfree_skb_reason+0x5c/0x260 net/core/skbuff.c:891 kfree_skb include/linux/skbuff.h:1216 [inline] kcm_recvmsg+0x226/0x2b0 net/kcm/kcmsock.c:1161 _sysrecvmsg+0x16c/0x2e0 _sys_recvmsg net/socket.c:2743 [inline] do_recvmmsg+0x2f1/0x710 net/socket.c:2837 __sys_recvmmsg net/socket.c:2916 [inline] __do_sys_recvmmsg net/socket.c:2939 [inline] __se_sys_recvmmsg net/socket.c:2932 [inline] __x64_sys_recvmmsg+0xde/0x160 net/socket.c:2932 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd
value changed: 0x01 -> 0x00
Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 17869 Comm: syz-executor.2 Not tainted 6.1.0-rc1-syzkaller-00010-gbb1a1146467a-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
{
"affected": [],
"aliases": [
"CVE-2022-50265"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-15T15:15:37Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nkcm: annotate data-races around kcm-\u003erx_wait\n\nkcm-\u003erx_psock can be read locklessly in kcm_rfree().\nAnnotate the read and writes accordingly.\n\nsyzbot reported:\n\nBUG: KCSAN: data-race in kcm_rcv_strparser / kcm_rfree\n\nwrite to 0xffff88810784e3d0 of 1 bytes by task 1823 on cpu 1:\nreserve_rx_kcm net/kcm/kcmsock.c:283 [inline]\nkcm_rcv_strparser+0x250/0x3a0 net/kcm/kcmsock.c:363\n__strp_recv+0x64c/0xd20 net/strparser/strparser.c:301\nstrp_recv+0x6d/0x80 net/strparser/strparser.c:335\ntcp_read_sock+0x13e/0x5a0 net/ipv4/tcp.c:1703\nstrp_read_sock net/strparser/strparser.c:358 [inline]\ndo_strp_work net/strparser/strparser.c:406 [inline]\nstrp_work+0xe8/0x180 net/strparser/strparser.c:415\nprocess_one_work+0x3d3/0x720 kernel/workqueue.c:2289\nworker_thread+0x618/0xa70 kernel/workqueue.c:2436\nkthread+0x1a9/0x1e0 kernel/kthread.c:376\nret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\n\nread to 0xffff88810784e3d0 of 1 bytes by task 17869 on cpu 0:\nkcm_rfree+0x121/0x220 net/kcm/kcmsock.c:181\nskb_release_head_state+0x8e/0x160 net/core/skbuff.c:841\nskb_release_all net/core/skbuff.c:852 [inline]\n__kfree_skb net/core/skbuff.c:868 [inline]\nkfree_skb_reason+0x5c/0x260 net/core/skbuff.c:891\nkfree_skb include/linux/skbuff.h:1216 [inline]\nkcm_recvmsg+0x226/0x2b0 net/kcm/kcmsock.c:1161\n____sys_recvmsg+0x16c/0x2e0\n___sys_recvmsg net/socket.c:2743 [inline]\ndo_recvmmsg+0x2f1/0x710 net/socket.c:2837\n__sys_recvmmsg net/socket.c:2916 [inline]\n__do_sys_recvmmsg net/socket.c:2939 [inline]\n__se_sys_recvmmsg net/socket.c:2932 [inline]\n__x64_sys_recvmmsg+0xde/0x160 net/socket.c:2932\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\ndo_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nvalue changed: 0x01 -\u003e 0x00\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 0 PID: 17869 Comm: syz-executor.2 Not tainted 6.1.0-rc1-syzkaller-00010-gbb1a1146467a-dirty #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022",
"id": "GHSA-7m24-gr82-qg53",
"modified": "2025-09-15T15:31:25Z",
"published": "2025-09-15T15:31:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50265"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0c745b5141a45a076f1cb9772a399f7ebcb0948a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2733fb2ad5bfbe6538f2f93a21f2504e3dba9d6a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/62086d1c4602e4f2ec07b975165afc2ed0ff1be9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/663682cd3192dd4f3547b7890a4391c72441001d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9ae47f11493509cde707af8ecc7eee04c8b8e635"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dbc3a0b917c4f75292b1c0819c188e40fd3c8924"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e2a28807b1ceaa309164b92c38d73d12feea33df"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f1f7122bb2ef056afc6f91ce4c35ab6df1207c8d"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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