CVE-2021-47538

Advisory lineage Upstream: 0 Downstream: 8
Analyzed
Published: 24 May 2024, 15:09
Last modified:23 May 2026, 15:20

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

24 May 2024, 15:09
Published
Vulnerability first disclosed
23 May 2026, 15:20
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer() Need to call rxrpc_put_local() for peer candidate before kfree() as it holds a ref to rxrpc_local. [DH: v2: Changed to abstract the peer freeing code out into a function]

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 5%

Techniques & Countermeasures

  • CWE-401•Missing Release of Memory after Effective Lifetime

    The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Affected Systems

  • linux•linux

    ≥ e8e51ce79c157188e209e5ea0afaf6b42dd76104, < 913c24af2d13a3fd304462916ee98e298d56bdce | ≥ 9ebeddef58c41bd700419cdcece24cf64ce32276, < 3e70e3a72d80b16094faccbe438cd53761c3503a | ≥ 9ebeddef58c41bd700419cdcece24cf64ce32276, < 60f0b9c42cb80833a03ca57c1c8b078d716e71d1 | ≥ 9ebeddef58c41bd700419cdcece24cf64ce32276, < 9469273e616ca8f1b6e3773c5019f21b4c8d828c | ≥ 9ebeddef58c41bd700419cdcece24cf64ce32276, < beacff50edbd6c9659a6f15fc7f6126909fade29 | 9b7fc03b4cdbfb668b6891967105258691c6d3b5 | ≥ 4.19.82, < 4.19.220 | ≥ 5.3.9, < 5.4 | 5.4

  • linux•linux_kernel

    ≥ 4.19.82, < 4.19.220 | ≥ 5.3.9, < 5.4 | ≥ 5.4.1, < 5.4.164 | ≥ 5.5, < 5.10.84 | ≥ 5.11, < 5.15.7 | 5.4 | 5.4:rc4 | 5.4:rc5 | 5.4:rc6 | 5.4:rc7 | 5.4:rc8 | 5.16:rc1 | 5.16:rc2 | 5.16:rc3

References (5)