Bug 1974456 (CVE-2021-33624) - CVE-2021-33624 kernel: Linux kernel BPF protection against speculative execution attacks can be bypassed to read arbitrary kernel memory
Summary: CVE-2021-33624 kernel: Linux kernel BPF protection against speculative execut...
Keywords:
Status: NEW
Alias: CVE-2021-33624
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: 1978299 1978300 1978301 1978302 1974457 1976848 1976849
Blocks: 1974458
TreeView+ depends on / blocked
 
Reported: 2021-06-21 18:14 UTC by Pedro Sampaio
Modified: 2022-07-16 03:22 UTC (History)
41 users (show)

Fixed In Version: kernel 5.13
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Linux kernel's BPF subsystem, where protection against speculative execution attacks (Spectre mitigation) can be bypassed. The highest threat from this vulnerability is to confidentiality.
Clone Of:
Environment:
Last Closed:


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Description Pedro Sampaio 2021-06-21 18:14:42 UTC
A flaw was found in the Linux kernel's BPF subsystem in sanitize_ptr_alu in kernel/bpf/verifier.c, where protection against speculative execution attacks (Spectre mitigation) can be bypassed. The highest threat from this vulnerability is to confidentiality.

References:

https://www.openwall.com/lists/oss-security/2021/06/21/1

Comment 1 Pedro Sampaio 2021-06-21 18:15:20 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1974457]


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