U.S. flag   An official website of the United States government
Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Vulnerability Change Records for CVE-2024-40996

Change History

New CVE Received by NIST 7/12/2024 9:15:20 AM

Action Type Old Value New Value
Added Description

								
							
							
						
In the Linux kernel, the following vulnerability has been resolved:

bpf: Avoid splat in pskb_pull_reason

syzkaller builds (CONFIG_DEBUG_NET=y) frequently trigger a debug
hint in pskb_may_pull.

We'd like to retain this debug check because it might hint at integer
overflows and other issues (kernel code should pull headers, not huge
value).

In bpf case, this splat isn't interesting at all: such (nonsensical)
bpf programs are typically generated by a fuzzer anyway.

Do what Eric suggested and suppress such warning.

For CONFIG_DEBUG_NET=n we don't need the extra check because
pskb_may_pull will do the right thing: return an error without the
WARN() backtrace.
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/2bbe3e5a2f4ef69d13be54f1cf895b4658287080 [No types assigned]
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/5e90258303a358e88737afb5048bee9113beea3a [No types assigned]
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/7f9644782c559635bd676c12c59389a34ed7c866 [No types assigned]
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/dacc15e9cb248d19e5fc63c54bef0b9b55007761 [No types assigned]