In the Linux kernel, the following vulnerability has been resolved:
net: xfrm: unexport __init-annotated xfrm4_protocol_init()
EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization. Hence, modules cannot use symbols annotated __init. The access to a freed symbol may end up with kernel panic.
modpost used to detect it, but it has been broken for a decade.
Recently, I fixed modpost so it started to warn it again, then this showed up in linux-next builds.
There are two ways to fix it:
- Remove __init - Remove EXPORT_SYMBOL
I chose the latter for this case because the only in-tree call-site, net/ipv4/xfrm4_policy.c is never compiled as modular. (CONFIG_XFRM is boolean)
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-livepatch-4.14.285-215.501Upgrade bpftool-debuginfoUpgrade kernel-tools-debuginfoUpgrade bpftoolUpgrade kernel-livepatch-5.15.50-23.125Upgrade kernelUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-5.10.126-117.518Upgrade kernel-debuginfoUpgrade kernel-develUpgrade kernel-debuginfo-common-x86_64Upgrade perfUpgrade perf-debuginfoUpgrade kernel-tools-develUpgrade python-perf-debuginfoUpgrade kernel-toolsUpgrade kernel-headersUpgrade python-perf | Mar 14, 2025 | Feb 26, 2025 |
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Huawei Euleros 2_0_sp10 | — | Upgrade python3-perfUpgrade kernel-tools-libsUpgrade kernel-toolsUpgrade kernelUpgrade kernel-abi-stablelists | Nov 12, 2025 | Jun 30, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-tools-libsUpgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade python3-perfUpgrade kernel | Jul 1, 2025 | Feb 26, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-gcp-5.15Upgrade linux-aws-fipsUpgrade linux-fipsUpgrade linux-ibmUpgrade linux-kvmUpgrade linux-azure-fipsUpgrade linux-gcp-fipsUpgrade linux-azure-5.15Upgrade linux-oracleUpgrade linux-aws-5.4Upgrade linux-hwe-5.15Upgrade linux-riscv-5.15Upgrade linux-raspiUpgrade linux-nvidiaUpgrade linux-azure-5.4Upgrade linux-lowlatencyUpgrade linux-azureUpgrade linux-intel-iotgUpgrade linux-aws-hweUpgrade linux-gcpUpgrade linux-hwe-5.4Upgrade linux-oracle-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-realtimeUpgrade linux-gkeopUpgrade linux-gkeUpgrade linux-raspi-5.4Upgrade linux-hweUpgrade linux-gcp-5.4Upgrade linux-awsUpgrade linux-azure-4.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-bluefieldUpgrade linuxUpgrade linux-gcp-4.15Upgrade linux-oracle-5.4Upgrade linux-aws-5.15Upgrade linux-ibm-5.4Upgrade linux-iot | Mar 3, 2025 | Feb 26, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Feb 26, 2025 |
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