CVE-2021-47124 (GCVE-0-2021-47124)

Vulnerability from cvelistv5 – Published: 2024-03-15 20:14 – Updated: 2026-05-11 13:48
VLAI?
Title
io_uring: fix link timeout refs
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1c20e9040f49687ba2ccc2ffd4411351a6c2ebff , < 0b2a990e5d2f76d020cb840c456e6ec5f0c27530 (git)
Affected: 1c20e9040f49687ba2ccc2ffd4411351a6c2ebff , < 6f5d7a45f58d3abe3a936de1441b8d6318f978ff (git)
Affected: 9ae1f8dd372e0e4c020b345cf9e09f519265e981 , < 876808dba2ff7509bdd7f230c4f374a0caf4f410 (git)
Affected: 9ae1f8dd372e0e4c020b345cf9e09f519265e981 , < ff4a96ba5c8f9b266706280ff8021d2ef3f17e86 (git)
Affected: 9ae1f8dd372e0e4c020b345cf9e09f519265e981 , < a298232ee6b9a1d5d732aa497ff8be0d45b5bd82 (git)
Affected: 567c81912cec641db75ac6cb64c63f8367c97d19 (git)
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Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.10.43 , ≤ 5.10.* (semver)
Unaffected: 5.10.55 , ≤ 5.10.* (semver)
Unaffected: 5.12.10 , ≤ 5.12.* (semver)
Unaffected: 5.12.19 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
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fs/io_uring.c:6660\\n __do_sys_io_uring_enter fs/io_uring.c:9240 [inline]\\n __se_sys_io_uring_enter+0x256/0x1d60 fs/io_uring.c:9182\\n\\nio_link_timeout_fn() should put only one reference of the linked timeout\\nrequest, however in case of racing with the master request\u0027s completion\\nfirst io_req_complete() puts one and then io_put_req_deferred() is\\ncalled.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: io_uring: corrige las referencias de tiempo de espera del enlace ADVERTENCIA: CPU: 0 PID: 10242 en lib/refcount.c:28 refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28 RIP: 0010: refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28 Seguimiento de llamadas: __refcount_sub_and_test include/linux/refcount.h:283 [en l\u00ednea] __refcount_dec_and_test include/linux/refcount.h:315 [en l\u00ednea] refcount_dec_and_test include/linux/refcount.h: 333 [en l\u00ednea] io_put_req fs/io_uring.c:2140 [en l\u00ednea] io_queue_linked_timeout fs/io_uring.c:6300 [en l\u00ednea] __io_queue_sqe+0xbef/0xec0 fs/io_uring.c:6354 io_submit_sqe fs/io_uring.c:6534 [en l\u00ednea] io_submit _sqes +0x2bbd/0x7c50 fs/io_uring.c:6660 __do_sys_io_uring_enter fs/io_uring.c:9240 [en l\u00ednea] __se_sys_io_uring_enter+0x256/0x1d60 fs/io_uring.c:9182 io_link_timeout_fn() debe poner solo una referencia de la solicitud de tiempo de espera vinculada, sin embargo en En el caso de competir con la finalizaci\u00f3n de la solicitud maestra, primero io_req_complete() coloca uno y luego se llama a io_put_req_deferred().\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.10.26\",\"versionEndExcluding\":\"5.10.43\",\"matchCriteriaId\":\"7AA99340-AE0B-4861-BD12-24D20E28B7BD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.10.44\",\"versionEndExcluding\":\"5.10.55\",\"matchCriteriaId\":\"6AF30DF1-E331-4DAC-B612-0FDA18281A08\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.12\",\"versionEndExcluding\":\"5.12.10\",\"matchCriteriaId\":\"C68A4290-9FFF-4037-9467-4FF878E3085F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.12.11\",\"versionEndExcluding\":\"5.12.19\",\"matchCriteriaId\":\"FFAD6692-628C-40D7-A83C-01022B6D6DBA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0b2a990e5d2f76d020cb840c456e6ec5f0c27530\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6f5d7a45f58d3abe3a936de1441b8d6318f978ff\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/876808dba2ff7509bdd7f230c4f374a0caf4f410\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a298232ee6b9a1d5d732aa497ff8be0d45b5bd82\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ff4a96ba5c8f9b266706280ff8021d2ef3f17e86\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/0b2a990e5d2f76d020cb840c456e6ec5f0c27530\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6f5d7a45f58d3abe3a936de1441b8d6318f978ff\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/876808dba2ff7509bdd7f230c4f374a0caf4f410\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a298232ee6b9a1d5d732aa497ff8be0d45b5bd82\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ff4a96ba5c8f9b266706280ff8021d2ef3f17e86\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
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      "dataType": "CVE_RECORD",
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.