fkie_cve-2021-47297
Vulnerability from fkie_nvd
Published
2024-05-21 15:15
Modified
2025-04-02 14:42
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: fix uninit-value in caif_seqpkt_sendmsg
When nr_segs equal to zero in iovec_from_user, the object
msg->msg_iter.iov is uninit stack memory in caif_seqpkt_sendmsg
which is defined in ___sys_sendmsg. So we cann't just judge
msg->msg_iter.iov->base directlly. We can use nr_segs to judge
msg in caif_seqpkt_sendmsg whether has data buffers.
=====================================================
BUG: KMSAN: uninit-value in caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x220 lib/dump_stack.c:118
kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118
__msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg net/socket.c:672 [inline]
____sys_sendmsg+0x12b6/0x1350 net/socket.c:2343
___sys_sendmsg net/socket.c:2397 [inline]
__sys_sendmmsg+0x808/0xc90 net/socket.c:2480
__compat_sys_sendmmsg net/compat.c:656 [inline]
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | 5.14 | |
| linux | linux_kernel | 5.14 |
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix uninit-value in caif_seqpkt_sendmsg\n\nWhen nr_segs equal to zero in iovec_from_user, the object\nmsg-\u003emsg_iter.iov is uninit stack memory in caif_seqpkt_sendmsg\nwhich is defined in ___sys_sendmsg. So we cann\u0027t just judge\nmsg-\u003emsg_iter.iov-\u003ebase directlly. We can use nr_segs to judge\nmsg in caif_seqpkt_sendmsg whether has data buffers.\n\n=====================================================\nBUG: KMSAN: uninit-value in caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542\nCall Trace:\n __dump_stack lib/dump_stack.c:77 [inline]\n dump_stack+0x1c9/0x220 lib/dump_stack.c:118\n kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118\n __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215\n caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542\n sock_sendmsg_nosec net/socket.c:652 [inline]\n sock_sendmsg net/socket.c:672 [inline]\n ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2343\n ___sys_sendmsg net/socket.c:2397 [inline]\n __sys_sendmmsg+0x808/0xc90 net/socket.c:2480\n __compat_sys_sendmmsg net/compat.c:656 [inline]"
},
{
"lang": "es",
"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net: corrige el valor uninit en caif_seqpkt_sendmsg. Cuando nr_segs es igual a cero en iovec_from_user, el objeto msg-\u0026gt;msg_iter.iov es la memoria de pila uninit en caif_seqpkt_sendmsg que est\u00e1 definida en ___sys_sendmsg. Entonces no podemos simplemente juzgar msg-\u0026gt;msg_iter.iov-\u0026gt;base directamente. Podemos usar nr_segs para juzgar si msg en caif_seqpkt_sendmsg tiene buffers de datos. ==================================================== === BUG: KMSAN: valor uninit en caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542 Seguimiento de llamadas: __dump_stack lib/dump_stack.c:77 [en l\u00ednea] dump_stack+0x1c9/0x220 lib/dump_stack.c: 118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542 sock_sendmsg_nosec net/so cket.c: 652 [en l\u00ednea] sock_sendmsg net/socket.c:672 [en l\u00ednea] ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2343 ___sys_sendmsg net/socket.c:2397 [en l\u00ednea] __sys_sendmmsg+0x808/0xc90 80 __compat_sys_sendmmsg net/compat.c:656 [en l\u00ednea]"
}
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"id": "CVE-2021-47297",
"lastModified": "2025-04-02T14:42:58.820",
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"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"published": "2024-05-21T15:15:17.553",
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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