CVE-2021-47124
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
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_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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 1c20e9040f49687ba2ccc2ffd4411351a6c2ebff | affected | git | 0b2a990e5d2f76d020cb840c456e6ec5f0c27530 | Unavailable | None listed |
| 1c20e9040f49687ba2ccc2ffd4411351a6c2ebff | affected | git | 6f5d7a45f58d3abe3a936de1441b8d6318f978ff | Unavailable | None listed |
| 9ae1f8dd372e0e4c020b345cf9e09f519265e981 | affected | git | 876808dba2ff7509bdd7f230c4f374a0caf4f410 | Unavailable | None listed |
| 9ae1f8dd372e0e4c020b345cf9e09f519265e981 | affected | git | ff4a96ba5c8f9b266706280ff8021d2ef3f17e86 | Unavailable | None listed |
| 9ae1f8dd372e0e4c020b345cf9e09f519265e981 | affected | git | a298232ee6b9a1d5d732aa497ff8be0d45b5bd82 | Unavailable | None listed |
| 567c81912cec641db75ac6cb64c63f8367c97d19 | affected | git | Unavailable | Unavailable | None listed |
| 5.10.26 | affected | semver | 5.10.43 | Unavailable | None listed |
| 5.10.26 | affected | semver | 5.10.55 | Unavailable | None listed |
| 5.11.6 | affected | semver | 5.12 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.12 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.12 | Unavailable | None listed |
| 5.10.43 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.10.55 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.12.10 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.12.19 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |