Bug 2026786 (CVE-2021-4135) - CVE-2021-4135 kernel: Heap information leak in map_lookup_elem function
Summary: CVE-2021-4135 kernel: Heap information leak in map_lookup_elem function
Keywords:
Status: NEW
Alias: CVE-2021-4135
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: Red Hat2027105 Red Hat2027106 Red Hat2027107
Blocks: Embargoed2026788 Red Hat2033830
TreeView+ depends on / blocked
 
Reported: 2021-11-25 19:53 UTC by Pedro Sampaio
Modified: 2023-05-12 19:43 UTC (History)
45 users (show)

Fixed In Version: Linux kernel 5.16-rc6
Doc Type: If docs needed, set a value
Doc Text:
A flaw memory leak in the Linux kernel's eBPF for the Simulated networking device driver in the way user uses BPF for the device such that function nsim_map_alloc_elem being called. A local user could use this flaw to get unauthorized access to some data.
Clone Of:
Environment:
Last Closed:

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Description Pedro Sampaio 2021-11-25 19:53:38 UTC 
A kernel information leak was found in the map_lookup_elem function.

Upstream commit:

https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=481221775d53
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