CVE-2020-36791
Linux Kernel net_sched Out-of-Bounds Access Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: net_sched: keep alloc_hash updated after hash allocation In commit 599be01ee567 ("net_sched: fix an OOB access in cls_tcindex") I moved cp->hash calculation before the first tcindex_alloc_perfect_hash(), but cp->alloc_hash is left untouched. This difference could lead to another out of bound access. cp->alloc_hash should always be the size allocated, we should update it after this tcindex_alloc_perfect_hash().
INFO
Published Date :
May 7, 2025, 2:15 p.m.
Last Modified :
May 8, 2025, 2:39 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
Exploitability Score :
References to Advisories, Solutions, and Tools
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CVE-2020-36791.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2020-36791 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-36791 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 07, 2025
Action Type Old Value New Value Added Reference https://blog.cdthoughts.ch/2021/03/16/syzbot-bug.html Added Reference https://syzkaller.appspot.com/bug?id=ea260693da894e7b078d18fca2c9c0a19b457534 -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 07, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: net_sched: keep alloc_hash updated after hash allocation In commit 599be01ee567 ("net_sched: fix an OOB access in cls_tcindex") I moved cp->hash calculation before the first tcindex_alloc_perfect_hash(), but cp->alloc_hash is left untouched. This difference could lead to another out of bound access. cp->alloc_hash should always be the size allocated, we should update it after this tcindex_alloc_perfect_hash(). Added Reference https://git.kernel.org/stable/c/0d1c3530e1bd38382edef72591b78e877e0edcd3 Added Reference https://git.kernel.org/stable/c/557d015ffb27b672e24e6ad141fd887783871dc2 Added Reference https://git.kernel.org/stable/c/9f8b6c44be178c2498a00b270872a6e30e7c8266 Added Reference https://git.kernel.org/stable/c/bd3ee8fb6371b45c71c9345cc359b94da2ddefa9 Added Reference https://git.kernel.org/stable/c/c4453d2833671e3a9f6bd52f0f581056c3736386 Added Reference https://git.kernel.org/stable/c/d23faf32e577922b6da20bf3740625c1105381bf Added Reference https://git.kernel.org/stable/c/d6cdc5bb19b595486fb2e6661e5138d73a57f454
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-36791 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-36791
weaknesses.