CVE-2024-40996 (GCVE-0-2024-40996)
Vulnerability from cvelistv5
Published
2024-07-12 12:37
Modified
2025-05-04 12:57
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8af60bb2b215f478b886f1d6d302fefa7f0b917d
Version: 1b2b26595bb09febf14c5444c873ac4ec90a5a77
Version: 219eee9c0d16f1b754a8b85275854ab17df0850a
Version: 219eee9c0d16f1b754a8b85275854ab17df0850a
Version: fff05b2b004d9a8a2416d08647f3dc9068e357c8
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