CVE-2022-50265
Estado: AnalizadaMedia (5.5)—
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:
value changed: 0x01 -> 0x00
Detalles técnicos trazas, registros y código del informe original
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 ____sys_recvmsg+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 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
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.16%
- Percentil entre todas las CVEs puntuadas: 4
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/0c745b5141a45a076f1cb9772a399f7ebcb0948a
- https://git.kernel.org/stable/c/2733fb2ad5bfbe6538f2f93a21f2504e3dba9d6a
- https://git.kernel.org/stable/c/62086d1c4602e4f2ec07b975165afc2ed0ff1be9
- https://git.kernel.org/stable/c/663682cd3192dd4f3547b7890a4391c72441001d
- https://git.kernel.org/stable/c/9ae47f11493509cde707af8ecc7eee04c8b8e635
- https://git.kernel.org/stable/c/dbc3a0b917c4f75292b1c0819c188e40fd3c8924
- https://git.kernel.org/stable/c/e2a28807b1ceaa309164b92c38d73d12feea33df
- https://git.kernel.org/stable/c/f1f7122bb2ef056afc6f91ce4c35ab6df1207c8d
JSON original (NVD)
Mostrar
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"source": "nvd@nist.gov",
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"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 1.8
}
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"description": [
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"descriptions": [
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkcm: annotate data-races around kcm->rx_wait\n\nkcm->rx_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 -> 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"
}
],
"lastModified": "2026-06-17T05:23:06.630",
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