CVE-2024-40996 — bpf: Avoid splat in pskb_pull_reason

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Linux / Linux	affected 8af60bb2b215f478b886f1d6d302fefa7f0b917d before dacc15e9cb248d19e5fc63c54bef0b9b55007761; affected 1b2b26595bb09febf14c5444c873ac4ec90a5a77 before 7f9644782c559635bd676c12c59389a34ed7c866; affected 219eee9c0d16f1b754a8b85275854ab17df0850a before 5e90258303a358e88737afb5048bee9113beea3a; affected 219eee9c0d16f1b754a8b85275854ab17df0850a before 2bbe3e5a2f4ef69d13be54f1cf895b4658287080; affected fff05b2b004d9a8a2416d08647f3dc9068e357c8; affected 6.1.86 before 6.1.96; affected 6.6.27 before 6.6.36; affected 6.8.6 before 6.9
Linux / Linux	affected 6.9; unaffected 0 before 6.9; unaffected 6.1.96 through 6.1.; unaffected 6.6.36 through 6.6.; unaffected 6.9.7 through 6.9.; unaffected 6.10 through

Vendor / product

Versions

Linux / Linux

affected 8af60bb2b215f478b886f1d6d302fefa7f0b917d before dacc15e9cb248d19e5fc63c54bef0b9b55007761; affected 1b2b26595bb09febf14c5444c873ac4ec90a5a77 before 7f9644782c559635bd676c12c59389a34ed7c866; affected 219eee9c0d16f1b754a8b85275854ab17df0850a before 5e90258303a358e88737afb5048bee9113beea3a; affected 219eee9c0d16f1b754a8b85275854ab17df0850a before 2bbe3e5a2f4ef69d13be54f1cf895b4658287080; affected fff05b2b004d9a8a2416d08647f3dc9068e357c8; affected 6.1.86 before 6.1.96; affected 6.6.27 before 6.6.36; affected 6.8.6 before 6.9

Linux / Linux

affected 6.9; unaffected 0 before 6.9; unaffected 6.1.96 through 6.1.*; unaffected 6.6.36 through 6.6.*; unaffected 6.9.7 through 6.9.*; unaffected 6.10 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CVE

No English description supplied.

CISA-ADP

No English description supplied.

No references supplied.