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Fencer Vulns
high 7.5

CVE-2024-41066 json

ibmvnic: Add tx check to prevent skb leak

published 2024-07-29 2 y ago modified 2026-08-05 3 mo ago also EUVD-2024-38864

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

ibmvnic: Add tx check to prevent skb leak

Below is a summary of how the driver stores a reference to an skb during transmit: tx_buff[free_map[consumer_index]]->skb = new_skb; free_map[consumer_index] = IBMVNIC_INVALID_MAP; consumer_index ++; Where variable data looks like this: free_map == [4, IBMVNIC_INVALID_MAP, IBMVNIC_INVALID_MAP, 0, 3] consumer_index^ tx_buff == [skb=null, skb=<ptr>, skb=<ptr>, skb=null, skb=null]

The driver has checks to ensure that free_map[consumer_index] pointed to a valid index but there was no check to ensure that this index pointed to an unused/null skb address. So, if, by some chance, our free_map and tx_buff lists become out of sync then we were previously risking an skb memory leak. This could then cause tcp congestion control to stop sending packets, eventually leading to ETIMEDOUT.

Therefore, add a conditional to ensure that the skb address is null. If not then warn the user (because this is still a bug that should be patched) and free the old pointer to prevent memleak/tcp problems.

Patch / fix

  • Linux Linux 5.13, 5.14, 6.1.101, 6.6.42, 6.9.11, 6.10
  • linux Debian 12 6.1.106-1
  • linux Debian 14, Debian 13 6.9.11-1

debian advisories DEBIAN-CVE-2024-41066

  • linux Ubuntu 20.04 LTS 5.4.0-208.228
  • linux Ubuntu 22.04 LTS 5.15.0-133.144
  • linux Ubuntu 24.04 LTS 6.8.0-48.48
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1140.150
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1078.85
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1018.20
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1143.152
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1077.86

ubuntu advisories UBUNTU-CVE-2024-41066

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-rt RHEL 8 4.18.0-553.27.1.rt7.368.el8_10
  • kernel-rt-kvm RHEL 8 4.18.0-553.27.1.rt7.368.el8_10
  • kernel-rt-core RHEL 8 4.18.0-553.27.1.rt7.368.el8_10
  • kernel-rt-modules RHEL 8 4.18.0-553.27.1.rt7.368.el8_10
  • kernel-rt-debug-kvm RHEL 8 4.18.0-553.27.1.rt7.368.el8_10
  • kernel-rt-debug-core RHEL 8 4.18.0-553.27.1.rt7.368.el8_10
  • kernel-rt-debug-modules RHEL 8 4.18.0-553.27.1.rt7.368.el8_10
  • kernel-rt-modules-extra RHEL 8 4.18.0-553.27.1.rt7.368.el8_10

red hat advisories RHSA-2024:9546RHSA-2024:8870RHSA-2024:8856RHSA-2024:8158RHSA-2024:8157

  • kernel-rt Linux Micro 6.0 6.4.0-10.1
  • kernel-source-rt Linux Micro 6.0 6.4.0-10.1
  • kernel-livepatch-MICRO-6-0-RT_Update_2 Linux Micro 6.0 1-1.1
  • kernel-source Linux Micro 6.0 6.4.0-19.1
  • kernel-default Linux Micro 6.0 6.4.0-19.1
  • kernel-kvmsmall Linux Micro 6.0 6.4.0-19.1
  • kernel-default-base Linux Micro 6.0 6.4.0-17.1.1.51
  • kernel-livepatch-MICRO-6-0_Update_2 Linux Micro 6.0 1-1.1

suse advisories SUSE-SU-2025:20047-1SUSE-SU-2025:20044-1SUSE-SU-2024:3383-1SUSE-SU-2024:3195-1SUSE-SU-2024:3194-1SUSE-SU-2024:2947-1

  • kernel AlmaLinux 8 4.18.0-553.27.1.el8_10
  • perf AlmaLinux 8 4.18.0-553.27.1.el8_10
  • bpftool AlmaLinux 8 4.18.0-553.27.1.el8_10
  • kernel-core AlmaLinux 8 4.18.0-553.27.1.el8_10
  • kernel-tools AlmaLinux 8 4.18.0-553.27.1.el8_10
  • python3-perf AlmaLinux 8 4.18.0-553.27.1.el8_10
  • kernel-modules AlmaLinux 8 4.18.0-553.27.1.el8_10
  • kernel-zfcpdump AlmaLinux 8 4.18.0-553.27.1.el8_10

almalinux advisories ALSA-2024:8856ALSA-2024:8870

  • kernel-rt Rocky Linux 8 4.18.0-553.27.1.rt7.368.el8_10
  • kernel Rocky Linux 8 4.18.0-553.27.1.el8_10

rocky linux advisories RLSA-2024:8870RLSA-2024:8856

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-41066 updated cvss 4.4

kernel: ibmvnic: Add tx check to prevent skb leak

  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    affected: workaround, no fix planned “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.”
  • Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more
    affected: workaround, no fix available “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.”
  • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-debuginfo-common-s390x 5.14.0-284.88.1.el9_2, kernel-debuginfo-common-x86_64 5.14.0-284.88.1.el9_2, kernel-debuginfo-common-aarch64 5.14.0-284.88.1.el9_2, kernel-debuginfo-common-ppc64le 5.14.0-284.88.1.el9_2
    fixed: vendor fix “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2024:8157
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.44.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.44.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.44.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.44.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.44.1.el9_4
    fixed: vendor fix “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2024:9546
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) perf 5.14.0-284.88.1.el9_2, rtla 5.14.0-284.88.1.el9_2, kernel-devel-matched 5.14.0-284.88.1.el9_2, kernel-64k-devel-matched 5.14.0-284.88.1.el9_2, kernel-debug-devel-matched 5.14.0-284.88.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.88.1.el9_2, +5 more
    fixed: vendor fix “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2024:8157
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.44.1.el9_4, perf 5.14.0-427.44.1.el9_4, rtla 5.14.0-427.44.1.el9_4, kernel-devel-matched 5.14.0-427.44.1.el9_4, kernel-64k-devel-matched 5.14.0-427.44.1.el9_4, kernel-debug-devel-matched 5.14.0-427.44.1.el9_4, +6 more
    fixed: vendor fix “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2024:9546
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.27.1.el8_10, kernel 4.18.0-553.27.1.el8_10, bpftool 4.18.0-553.27.1.el8_10, kernel-core 4.18.0-553.27.1.el8_10, kernel-tools 4.18.0-553.27.1.el8_10, python3-perf 4.18.0-553.27.1.el8_10, +15 more
    fixed: vendor fix “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2024:8856
  • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool 7.0.0-284.88.1.el9_2, kernel 5.14.0-284.88.1.el9_2, kernel-64k 5.14.0-284.88.1.el9_2, kernel-core 5.14.0-284.88.1.el9_2, kernel-tools 5.14.0-284.88.1.el9_2, python3-perf 5.14.0-284.88.1.el9_2, +28 more
    fixed: vendor fix “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2024:8157
show 9 more
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.44.1.el9_4, kernel 5.14.0-427.44.1.el9_4, kernel-64k 5.14.0-427.44.1.el9_4, kernel-core 5.14.0-427.44.1.el9_4, kernel-tools 5.14.0-427.44.1.el9_4, python3-perf 5.14.0-427.44.1.el9_4, +28 more
    fixed: vendor fix “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2024:9546
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.27.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.27.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.27.1.el8_10
    fixed: vendor fix “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2024:8856
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-kvm 4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-core 4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-modules 4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-debug-kvm 4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-debug-core 4.18.0-553.27.1.rt7.368.el8_10, +4 more
    fixed: vendor fix “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2024:8870
  • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt 5.14.0-284.88.1.rt14.373.el9_2, kernel-rt-core 5.14.0-284.88.1.rt14.373.el9_2, kernel-rt-modules 5.14.0-284.88.1.rt14.373.el9_2, kernel-rt-debug-core 5.14.0-284.88.1.rt14.373.el9_2, kernel-rt-modules-core 5.14.0-284.88.1.rt14.373.el9_2, kernel-rt-debug-modules 5.14.0-284.88.1.rt14.373.el9_2, +4 more
    fixed: vendor fix “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2024:8158
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.44.1.el9_4, kernel-rt-core 5.14.0-427.44.1.el9_4, kernel-rt-modules 5.14.0-427.44.1.el9_4, kernel-rt-debug-core 5.14.0-427.44.1.el9_4, kernel-rt-modules-core 5.14.0-427.44.1.el9_4, kernel-rt-debug-modules 5.14.0-427.44.1.el9_4, +4 more
    fixed: vendor fix “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2024:9546
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt 5.14.0-284.88.1.rt14.373.el9_2, kernel-rt-kvm 5.14.0-284.88.1.rt14.373.el9_2, kernel-rt-core 5.14.0-284.88.1.rt14.373.el9_2, kernel-rt-modules 5.14.0-284.88.1.rt14.373.el9_2, kernel-rt-debug-kvm 5.14.0-284.88.1.rt14.373.el9_2, kernel-rt-debug-core 5.14.0-284.88.1.rt14.373.el9_2, +6 more
    fixed: vendor fix “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2024:8158
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt 5.14.0-427.44.1.el9_4, kernel-rt-kvm 5.14.0-427.44.1.el9_4, kernel-rt-core 5.14.0-427.44.1.el9_4, kernel-rt-modules 5.14.0-427.44.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.44.1.el9_4, kernel-rt-debug-core 5.14.0-427.44.1.el9_4, +6 more
    fixed: vendor fix “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2024:9546
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-core 4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-modules 4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-debug-core 4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-debug-modules 4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-modules-extra 4.18.0-553.27.1.rt7.368.el8_10, +2 more
    fixed: vendor fix “To mitigate this issue, prevent module ibmvnic from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2024:8870
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-doc 5.14.0-284.88.1.el9_2
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.53% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.