CVE-2021-47124
published 2024-03-15CVE-2021-47124: In the Linux kernel, the following vulnerability has been resolved: io_uring: fix link timeout refs WARNING: CPU: 0 PID: 10242 at lib/refcount.c:28…
PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.24%
15.3th percentile
In the Linux kernel, the following vulnerability has been resolved:
io_uring: fix link timeout refs
WARNING: CPU: 0 PID: 10242 at lib/refcount.c:28 refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28
RIP: 0010:refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28
Call Trace:
__refcount_sub_and_test include/linux/refcount.h:283 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
io_put_req fs/io_uring.c:2140 [inline]
io_queue_linked_timeout fs/io_uring.c:6300 [inline]
__io_queue_sqe+0xbef/0xec0 fs/io_uring.c:6354
io_submit_sqe fs/io_uring.c:6534 [inline]
io_submit_sqes+0x2bbd/0x7c50 fs/io_uring.c:6660
__do_sys_io_uring_enter fs/io_uring.c:9240 [inline]
__se_sys_io_uring_enter+0x256/0x1d60 fs/io_uring.c:9182
io_link_timeout_fn() should put only one reference of the linked timeout
request, however in case of racing with the master request's completion
first io_req_complete() puts one and then io_put_req_deferred() is
called.
Affected
20 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.14.6-1 (bookworm) | linux 5.14.6-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | >= 1c20e9040f49687ba2ccc2ffd4411351a6c2ebff < 0b2a990e5d2f76d020cb840c456e6ec5f0c27530 | 0b2a990e5d2f76d020cb840c456e6ec5f0c27530 |
| linux | linux | >= 1c20e9040f49687ba2ccc2ffd4411351a6c2ebff < 6f5d7a45f58d3abe3a936de1441b8d6318f978ff | 6f5d7a45f58d3abe3a936de1441b8d6318f978ff |
| linux | linux | >= 5.10.26 < 5.10.43 | 5.10.43 |
| linux | linux | >= 5.10.26 < 5.10.55 | 5.10.55 |
| linux | linux | >= 5.11.6 < 5.12 | 5.12 |
| linux | linux | >= 9ae1f8dd372e0e4c020b345cf9e09f519265e981 < 876808dba2ff7509bdd7f230c4f374a0caf4f410 | 876808dba2ff7509bdd7f230c4f374a0caf4f410 |
| linux | linux | >= 9ae1f8dd372e0e4c020b345cf9e09f519265e981 < ff4a96ba5c8f9b266706280ff8021d2ef3f17e86 | ff4a96ba5c8f9b266706280ff8021d2ef3f17e86 |
| linux | linux | >= 9ae1f8dd372e0e4c020b345cf9e09f519265e981 < a298232ee6b9a1d5d732aa497ff8be0d45b5bd82 | a298232ee6b9a1d5d732aa497ff8be0d45b5bd82 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.70-1 | 5.10.70-1 |
| linux | linux_kernel | >= 0 < 5.14.6-1 | 5.14.6-1 |
| linux | linux_kernel | >= 0 < 5.14.6-1 | 5.14.6-1 |
| linux | linux_kernel | >= 0 < 5.14.6-1 | 5.14.6-1 |
| linux | linux_kernel | >= 5.10.26 < 5.10.43 | 5.10.43 |
| linux | linux_kernel | >= 5.10.44 < 5.10.55 | 5.10.55 |
| linux | linux_kernel | >= 5.12 < 5.12.10 | 5.12.10 |
| linux | linux_kernel | >= 5.12.11 < 5.12.19 | 5.12.19 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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Red Hat
kernel: io_uring: fix link timeout refs
vendor_redhat·2024-03-15·CVSS 5.5
CVE-2021-47124 [MEDIUM] CWE-20 kernel: io_uring: fix link timeout refs
kernel: io_uring: fix link timeout refs
In the Linux kernel, the following vulnerability has been resolved:
io_uring: fix link timeout refs
WARNING: CPU: 0 PID: 10242 at lib/refcount.c:28 refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28
RIP: 0010:refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28
Call Trace:
__refcount_sub_and_test include/linux/refcount.h:283 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
io_put_req fs/io_uring.c:2140 [inline]
io_queue_linked_timeout fs/io_uring.c:6300 [inline]
__io_queue_sqe+0xbef/0xec0 fs/io_uring.c:6354
io_submit_sqe fs/io_uring.c:6534 [inline]
io_submit_sqes+0x2bbd/0x7c50 fs/io_uring.c:6660
__do_sys_io_uring_enter fs/io_uring.c:9240 [inline]
__se_sys_io_uring_en
Debian
CVE-2021-47124: linux - In the Linux kernel, the following vulnerability has been resolved: io_uring: f...
vendor_debian·2021·CVSS 5.5
CVE-2021-47124 [MEDIUM] CVE-2021-47124: linux - In the Linux kernel, the following vulnerability has been resolved: io_uring: f...
In the Linux kernel, the following vulnerability has been resolved: io_uring: fix link timeout refs WARNING: CPU: 0 PID: 10242 at lib/refcount.c:28 refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28 RIP: 0010:refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28 Call Trace: __refcount_sub_and_test include/linux/refcount.h:283 [inline] __refcount_dec_and_test include/linux/refcount.h:315 [inline] refcount_dec_and_test include/linux/refcount.h:333 [inline] io_put_req fs/io_uring.c:2140 [inline] io_queue_linked_timeout fs/io_uring.c:6300 [inline] __io_queue_sqe+0xbef/0xec0 fs/io_uring.c:6354 io_submit_sqe fs/io_uring.c:6534 [inline] io_submit_sqes+0x2bbd/0x7c50 fs/io_uring.c:6660 __do_sys_io_uring_enter fs/io_uring.c:9240 [inline] __se_sys_io_uring_enter+0x256/0x1d60 fs/io_uring.c:9182 io_li
VulDB
Linux Kernel up to 5.10.54/5.12.18 io_uring lib/refcount.c io_link_timeout_fn privilege escalation
vuldb·2026-08-05·CVSS 5.5
CVE-2021-47124 [MEDIUM] Linux Kernel up to 5.10.54/5.12.18 io_uring lib/refcount.c io_link_timeout_fn privilege escalation
A vulnerability classified as problematic was found in Linux Kernel up to 5.10.54/5.12.18. This affects the function io_link_timeout_fn in the library lib/refcount.c of the component io_uring. Such manipulation leads to privilege escalation.
This vulnerability is uniquely identified as CVE-2021-47124. The attack can only be initiated within the local network. No exploit exists.
Upgrading the affected component is advised.
GHSA
GHSA-9r82-f7g4-qf37: In the Linux kernel, the following vulnerability has been resolved:
io_uring: fix link timeout refs
WARNING: CPU: 0 PID: 10242 at lib/refcount
ghsa_unreviewed·2024-03-15
CVE-2021-47124 [MEDIUM] GHSA-9r82-f7g4-qf37: In the Linux kernel, the following vulnerability has been resolved:
io_uring: fix link timeout refs
WARNING: CPU: 0 PID: 10242 at lib/refcount
In the Linux kernel, the following vulnerability has been resolved:
io_uring: fix link timeout refs
WARNING: CPU: 0 PID: 10242 at lib/refcount.c:28 refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28
RIP: 0010:refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28
Call Trace:
__refcount_sub_and_test include/linux/refcount.h:283 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
io_put_req fs/io_uring.c:2140 [inline]
io_queue_linked_timeout fs/io_uring.c:6300 [inline]
__io_queue_sqe+0xbef/0xec0 fs/io_uring.c:6354
io_submit_sqe fs/io_uring.c:6534 [inline]
io_submit_sqes+0x2bbd/0x7c50 fs/io_uring.c:6660
__do_sys_io_uring_enter fs/io_uring.c:9240 [inline]
__se_sys_io_uring_enter+0x256/0x1d60 fs/io_uring.c:9182
io
OSV
CVE-2021-47124: In the Linux kernel, the following vulnerability has been resolved: io_uring: fix link timeout refs WARNING: CPU: 0 PID: 10242 at lib/refcount
osv·2024-03-15·CVSS 5.5
CVE-2021-47124 [MEDIUM] CVE-2021-47124: In the Linux kernel, the following vulnerability has been resolved: io_uring: fix link timeout refs WARNING: CPU: 0 PID: 10242 at lib/refcount
In the Linux kernel, the following vulnerability has been resolved: io_uring: fix link timeout refs WARNING: CPU: 0 PID: 10242 at lib/refcount.c:28 refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28 RIP: 0010:refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28 Call Trace: __refcount_sub_and_test include/linux/refcount.h:283 [inline] __refcount_dec_and_test include/linux/refcount.h:315 [inline] refcount_dec_and_test include/linux/refcount.h:333 [inline] io_put_req fs/io_uring.c:2140 [inline] io_queue_linked_timeout fs/io_uring.c:6300 [inline] __io_queue_sqe+0xbef/0xec0 fs/io_uring.c:6354 io_submit_sqe fs/io_uring.c:6534 [inline] io_submit_sqes+0x2bbd/0x7c50 fs/io_uring.c:6660 __do_sys_io_uring_enter fs/io_uring.c:9240 [inline] __se_sys_io_uring_enter+0x256/0x1d60 fs/io_uring.c:9182 io_li
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/0b2a990e5d2f76d020cb840c456e6ec5f0c27530https://git.kernel.org/stable/c/6f5d7a45f58d3abe3a936de1441b8d6318f978ffhttps://git.kernel.org/stable/c/876808dba2ff7509bdd7f230c4f374a0caf4f410https://git.kernel.org/stable/c/a298232ee6b9a1d5d732aa497ff8be0d45b5bd82https://git.kernel.org/stable/c/ff4a96ba5c8f9b266706280ff8021d2ef3f17e86https://git.kernel.org/stable/c/0b2a990e5d2f76d020cb840c456e6ec5f0c27530https://git.kernel.org/stable/c/6f5d7a45f58d3abe3a936de1441b8d6318f978ffhttps://git.kernel.org/stable/c/876808dba2ff7509bdd7f230c4f374a0caf4f410https://git.kernel.org/stable/c/a298232ee6b9a1d5d732aa497ff8be0d45b5bd82https://git.kernel.org/stable/c/ff4a96ba5c8f9b266706280ff8021d2ef3f17e86
2024-03-15
Published