7.8

CVE-2024-36020: i40e: fix vf may be used uninitialized in this function warning

Modified
AliasesUBUNTU-CVE-2024-36020DEBIAN-CVE-2024-36020
Published 30-05-2024Last modified 15-10-2026

Vulnerability summary

CVE-2024-36020 is a high (CVSS 7.8) Use of Uninitialized Resource vulnerability in debian debian_linux. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 17.4% 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 (CVE.org)
EPSS score
0.26%
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 39 · Related 30
DLA-3840-1DLA-3842-1RHSA-2024:4902RHSA-2024:5066RHSA-2024:5067RHSA-2024:5101

Timeline

  1. 30-05-2024
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: i40e: fix vf may be used uninitialized in this function warning To fix the regression introduced by commit 52424f974bc5, which causes servers hang in very hard to reproduce conditions with resets races. Using two sources for the information is the root cause. In this function before the fix bumping v didn't mean bumping vf pointer. But the code used this variables interchangeably, so stale vf could point to different/not intended vf. Remove redundant "v" variable and iterate via single VF pointer across whole function instead to guarantee VF pointer validity.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.26% 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

Affected systems

Version check

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

Ubuntu121 products
  • linux< 4.15.0-231.243 | < 5.4.0-189.209 | < 5.15.0-116.126 | < 6.8.0-38.38
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.15.0-1175.188 | < 5.4.0-1128.138 | < 5.15.0-1065.71 | < 6.8.0-1011.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
Linux2 products
  • linux≥ 76ed715836c6994bac29d9638e9314e6e3b08651, < cc9cd02dd9e8b7764ea9effb24f4f1dd73d1b23d | ≥ e88c2a1e28c5475065563d66c07ca879a9afbd07, < 9dcf0fcb80f6aeb01469e3c957f8d4c97365450a | ≥ 9abae363af5ced6adbf04c14366289540281fb26, < b8e82128b44fa40bf99a50b919488ef361e1683c | ≥ c39de3ae5075ea5f78e097cb5720d4e52d5caed9, < 951d2748a2a8242853abc3d0c153ce4bf8faad31 | ≥ 52424f974bc53c26ba3f00300a00e9de9afcd972, < 3e89846283f3cf7c7a8e28b342576fd7c561d2ba | ≥ 52424f974bc53c26ba3f00300a00e9de9afcd972, < 0dcf573f997732702917af1563aa2493dc772fc0 | ≥ 52424f974bc53c26ba3f00300a00e9de9afcd972, < 06df7618f591b2dc43c59967e294d7b9fc8675b6 | ≥ 52424f974bc53c26ba3f00300a00e9de9afcd972, < f37c4eac99c258111d414d31b740437e1925b8e8 | 02f949747e6fb767b29f7931d4bbf40911684e7a | ≥ 4.19.264, < 4.19.312 | ≥ 5.4.223, < 5.4.274 | ≥ 5.10.153, < 5.10.215 | ≥ 5.15.77, < 5.15.154 | ≥ 6.0.7, < 6.1 | 6.1
  • linux_kernel≥ 4.19.264, < 4.19.312 | ≥ 5.4.223, < 5.4.274 | ≥ 5.10.153, < 5.10.215 | ≥ 5.15.77, < 5.15.154 | ≥ 6.0.7, < 6.1 | ≥ 6.1.1, < 6.1.85 | ≥ 6.2, < 6.6.26 | ≥ 6.7, < 6.8.5 | 6.1 | 6.1:rc3 | 6.1:rc4 | 6.1:rc5 | 6.1:rc6 | 6.1:rc7 | 6.1:rc8 | 6.9:rc1 | 6.9:rc2

3 vendors · 125 products

References

35 links
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