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TI-2024-23878 Aliases CVE-2024-36020

i40e: fix vf may be used uninitialized in this function warning

Priority LOW 34CWE-908Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 19 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00257 17th percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.19.312, 5.4.274, 5.10.215 +6Red Hat: 7 advisoriesRed Hat: 19 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux4.19.264 to before 4.19.312; 5.4.223 to before 5.4.274; 5.10.153 to before 5.10.215; 5.15.77 to before 5.15.154; 6.0.7 to before 6.14.19.312, 5.4.274, 5.10.215, 5.15.154, 6.1Patch availableCNA
LinuxLinux6.1 and later4.19.312, 5.4.274, 5.10.215, 5.15.154, 6.1.85, 6.6.26, 6.8.5, 6.9Patch availableCNA
  • Linux VendorLinux Affected 4.19.264 to before 4.19.312; 5.4.223 to before 5.4.274; 5.10.153 to before 5.10.215; 5.15.77 to before 5.15.154; 6.0.7 to before 6.1 Fixed in 4.19.312, 5.4.274, 5.10.215, 5.15.154, 6.1 Patch available CNA
  • Linux VendorLinux Affected 6.1 and later Fixed in 4.19.312, 5.4.274, 5.10.215, 5.15.154, 6.1.85, 6.6.26, 6.8.5, 6.9 Patch available CNA

CPE configurations NVD · 11

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.19.264 to before 4.19.312; 5.4.223 to before 5.4.274; 5.10.153 to before 5.10.215; 5.15.77 to before 5.15.154; 6.0.7 to before 6.1; 6.1.1 to before 6.1.85; 6.2 to before 6.6.26; 6.7 to before 6.8.5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.1:-:*:*:*:*:*:*6.1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*6.1 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*6.1 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*6.1 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.1:rc6:*:*:*:*:*:*6.1 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.1:rc7:*:*:*:*:*:*6.1 rc7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.1:rc8:*:*:*:*:*:*6.1 rc8VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*6.9 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*6.9 rc2VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.19.264 to before 4.19.312; 5.4.223 to before 5.4.274; 5.10.153 to before 5.10.215; 5.15.77 to before 5.15.154; 6.0.7 to before 6.1; 6.1.1 to before 6.1.85; 6.2 to before 6.6.26; 6.7 to before 6.8.5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.1:-:*:*:*:*:*:* Versions 6.1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:* Versions 6.1 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:* Versions 6.1 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:* Versions 6.1 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.1:rc6:*:*:*:*:*:* Versions 6.1 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.1:rc7:*:*:*:*:*:* Versions 6.1 rc7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.1:rc8:*:*:*:*:*:* Versions 6.1 rc8 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:* Versions 6.9 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:* Versions 6.9 rc2 Vulnerable ·Linux
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Linux (Linux) Fixed in 4.19.312, 5.4.274, 5.10.215, 5.15.154, 6.1
  • Fix · CNA Linux (Linux) Fixed in 4.19.312, 5.4.274, 5.10.215, 5.15.154, 6.1.85, 6.6.26, 6.8.5, 6.9

Red Hat 7 advisories

  • RHSA-2024:5363 Released 2024-08-15 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-427.31.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.31.1.el9_4, kernel-64k-devel-5.14.0-427.31.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.3.0-427.31.1.el9_4, kernel-5.14.0-427.31.1.el9_4, kernel-64k-5.14.0-427.31.1.el9_4 +29
    • Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-427.31.1.el9_4, libperf-5.14.0-427.31.1.el9_4
    • Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-427.31.1.el9_4, kernel-rt-core-5.14.0-427.31.1.el9_4, kernel-rt-debug-5.14.0-427.31.1.el9_4 +11
    • Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-427.31.1.el9_4, kernel-rt-core-5.14.0-427.31.1.el9_4, kernel-rt-debug-5.14.0-427.31.1.el9_4 +9
  • RHSA-2024:5255 Released 2024-08-13 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-tools-libs-devel-4.18.0-477.67.1.el8_8
    • Red Hat Enterprise Linux BaseOS EUS (v.8.8) bpftool-4.18.0-477.67.1.el8_8, kernel-4.18.0-477.67.1.el8_8, kernel-abi-stablelists-4.18.0-477.67.1.el8_8 +19
  • RHSA-2024:5101 Released 2024-08-08 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.16.1.el8_10, kernel-4.18.0-553.16.1.el8_10, kernel-abi-stablelists-4.18.0-553.16.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.16.1.el8_10
Show 4 more Red Hat advisories
  • RHSA-2024:5102 Released 2024-08-08 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-core-4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-debug-4.18.0-553.16.1.rt7.357.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-core-4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-debug-4.18.0-553.16.1.rt7.357.el8_10 +7
  • RHSA-2024:5066 Released 2024-08-07 · Red Hat rating Moderate
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-tools-libs-devel-5.14.0-284.77.1.el9_2
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-64k-debug-devel-5.14.0-284.77.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.77.1.el9_2, kernel-64k-devel-5.14.0-284.77.1.el9_2 +9
    • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool-7.0.0-284.77.1.el9_2, kernel-5.14.0-284.77.1.el9_2, kernel-64k-5.14.0-284.77.1.el9_2 +29
  • RHSA-2024:5067 Released 2024-08-07 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt-5.14.0-284.77.1.rt14.362.el9_2, kernel-rt-core-5.14.0-284.77.1.rt14.362.el9_2, kernel-rt-debug-5.14.0-284.77.1.rt14.362.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt-5.14.0-284.77.1.rt14.362.el9_2, kernel-rt-core-5.14.0-284.77.1.rt14.362.el9_2, kernel-rt-debug-5.14.0-284.77.1.rt14.362.el9_2 +11
  • RHSA-2024:4902 Released 2024-07-29 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.113.1.el8_6, kernel-4.18.0-372.113.1.el8_6, kernel-abi-stablelists-4.18.0-372.113.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.113.1.el8_6, kernel-4.18.0-372.113.1.el8_6, kernel-abi-stablelists-4.18.0-372.113.1.el8_6 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.6) bpftool-4.18.0-372.113.1.el8_6, kernel-4.18.0-372.113.1.el8_6, kernel-abi-stablelists-4.18.0-372.113.1.el8_6 +14

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.8.8)Fixed RHSA-2024:5255
Red Hat CodeReady Linux Builder EUS (v.9.2)Fixed RHSA-2024:5066
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:5363
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2024:5066
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2024:5101
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2024:5363
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2024:4902
Red Hat Enterprise Linux BaseOS E4S (v.8.6)Fixed RHSA-2024:4902
Red Hat Enterprise Linux BaseOS EUS (v.8.8)Fixed RHSA-2024:5255
Red Hat Enterprise Linux BaseOS EUS (v.9.2)Fixed RHSA-2024:5066
Red Hat Enterprise Linux BaseOS TUS (v.8.6)Fixed RHSA-2024:4902
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2024:5101
Red Hat Enterprise Linux CRB (v. 9)Fixed RHSA-2024:5363
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2024:5102
Red Hat Enterprise Linux NFV (v. 9)Fixed RHSA-2024:5363
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2024:5102
Red Hat Enterprise Linux RT (v. 9)Fixed RHSA-2024:5363
Red Hat Enterprise Linux Real Time EUS (v.9.2)Fixed RHSA-2024:5067
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2)Fixed RHSA-2024:5067
Not affected: 5 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux AppStream (v. 9)
  • Red Hat Enterprise Linux AppStream EUS (v.9.2)
  • Red Hat Enterprise Linux BaseOS EUS (v.8.8)
  • Red Hat Enterprise Linux CRB (v. 9)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-36020

References

Patch 8

Advisory 2

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences