7.8

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

Modified
AliasesUBUNTU-CVE-2024-40996DEBIAN-CVE-2024-40996
Published 12-07-2024Last modified 23-05-2026

Vulnerability summary

CVE-2024-40996 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 20.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.28%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 9 · Related 7
DLA-4008-1DSA-5731-1USN-6999-1USN-6999-2USN-7004-1USN-7005-1

Timeline

  1. 12-07-2024
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.28% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu84 products
  • linux< 6.8.0-44.44
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1015.16
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 8af60bb2b215f478b886f1d6d302fefa7f0b917d, < dacc15e9cb248d19e5fc63c54bef0b9b55007761 | ≥ 1b2b26595bb09febf14c5444c873ac4ec90a5a77, < 7f9644782c559635bd676c12c59389a34ed7c866 | ≥ 219eee9c0d16f1b754a8b85275854ab17df0850a, < 5e90258303a358e88737afb5048bee9113beea3a | ≥ 219eee9c0d16f1b754a8b85275854ab17df0850a, < 2bbe3e5a2f4ef69d13be54f1cf895b4658287080 | fff05b2b004d9a8a2416d08647f3dc9068e357c8 | ≥ 6.1.86, < 6.1.96 | ≥ 6.6.27, < 6.6.36 | ≥ 6.8.6, < 6.9 | 6.9
  • linux_kernel≥ 6.1.86, < 6.1.96 | ≥ 6.6.27, < 6.6.36 | ≥ 6.9, < 6.9.7 | 6.10:rc1 | 6.10:rc2 | 6.10:rc3 | 6.10:rc4
Debian1 product
  • linux< 6.1.99-1 | < 6.9.7-1

3 vendors · 87 products

References

17 links
Show all 17 references