Vulnerability Details : CVE-2021-47105
In the Linux kernel, the following vulnerability has been resolved:
ice: xsk: return xsk buffers back to pool when cleaning the ring
Currently we only NULL the xdp_buff pointer in the internal SW ring but
we never give it back to the xsk buffer pool. This means that buffers
can be leaked out of the buff pool and never be used again.
Add missing xsk_buff_free() call to the routine that is supposed to
clean the entries that are left in the ring so that these buffers in the
umem can be used by other sockets.
Also, only go through the space that is actually left to be cleaned
instead of a whole ring.
Products affected by CVE-2021-47105
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-47105
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 13 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-47105
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST | 2025-02-14 |
CWE ids for CVE-2021-47105
-
The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-47105
-
https://git.kernel.org/stable/c/ad6d20da2cfbe14b7b1200d15f39e65988b0b9e8
ice: xsk: return xsk buffers back to pool when cleaning the ring - kernel/git/stable/linux.git - Linux kernel stable treeExploit;Mailing List;Patch
-
https://git.kernel.org/stable/c/afe8a3ba85ec2a6b6849367e25c06a2f8e0ddd05
ice: xsk: return xsk buffers back to pool when cleaning the ring - kernel/git/stable/linux.git - Linux kernel stable treeExploit;Mailing List;Patch
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