Description
In the Linux kernel, the following vulnerability has been resolved:
net: fix information leakage in /proc/net/ptype
In one net namespace, after creating a packet socket without binding
it to a device, users in other net namespaces can observe the new
`packet_type` added by this packet socket by reading `/proc/net/ptype`
file. This is minor information leakage as packet socket is
namespace aware.
Add a net pointer in `packet_type` to keep the net namespace of
of corresponding packet socket. In `ptype_seq_show`, this net pointer
must be checked when it is not NULL.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 2.6.26 | 4.4.302 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 5.16.7-1 | — |
| Debian 13 | linux | 5.16.7-1 | — |
| Debian 12 | linux | 5.16.7-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +22 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-109.123 | — |
| Ubuntu 20.04 LTS | linux-aws +1 | 5.4.0-1072.77 | — |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1077.80 | — |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1035.38 | — |
| Ubuntu 20.04 LTS | linux-gke +26 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1039.40 | — |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1020.22 | — |
| Ubuntu 20.04 LTS | linux-iot | 5.4.0-1004.6 | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1062.65 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1070.76 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1059.67 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-176.185 | — |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1127.136 | — |
| Ubuntu 18.04 LTS | linux-aws-5.4 +1 | 5.4.0-1072.77~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1137.150 | — |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1077.80~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1121.135 | — |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-109.123~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-ibm-5.4 | 5.4.0-1020.22~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1113.116 | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1092.101 | — |
| Ubuntu 18.04 LTS | linux-oracle-5.4 | 5.4.0-1070.76~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1059.66~18.04.1 | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1072.77+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1076.79+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1048.54 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1071.75+fips1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2066.69 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2048.52 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1084.93 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-gcp-fips | 4.15.0-2031.34 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro 16.04 LTS | linux +2 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1127.136~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1137.150~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1121.135~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-176.185~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1092.101~16.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux +2 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1137.150~14.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-553.16.1.rt7.357.el8_10 | RHSA-2024:5102 |
| RHEL 8 | perf +26 | 4.18.0-553.16.1.el8_10 | RHSA-2024:5101 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.8 EUS | perf +26 | 4.18.0-477.70.1.el8_8 | RHSA-2024:6206 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | kernel-rt +11 | 4.18.0-553.16.1.rt7.357.el8_10 | ALSA-2024:5102 |
| AlmaLinux 8 | perf +24 | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | kernel | 4.18.0-553.16.1.el8_10 | RXSA-2024:5101, RLSA-2024:5101 |
| Rocky Linux 8 | kernel-rt | 4.18.0-553.16.1.rt7.357.el8_10 | RLSA-2024:5102 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.268-205.500 | 1.0-0.amzn2 | ALAS2-2022-1761 |
| Amazon Linux 2 | perf +8 | 4.14.268-205.500.amzn2 | ALAS2-2022-1761 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-553.16.1.el8_10 | ELSA-2024-5101 |
Advisories 12
- WID-SEC-2024-1422 Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Oct 29, 2026
- ALSA-2024:5102 Important: kernel-rt security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:5101 Important: kernel security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:5102 Red Hat Security Advisory: kernel-rt security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2024:5101 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2024:6206 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Aug 19, 2026
- WID-SEC-2024-1913 Red Hat OpenShift Container Platform: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 3, 2026
- RXSA-2024:5101 Important: kernel security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:5102 Important: kernel-rt security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:5101 Important: kernel security update Rocky Linux Security Advisories · Feb 5, 2026
- ALAS2-2022-1761 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 2, 2025
- ELSA-2024-5101 Important: kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 8, 2024
References
- https://git.kernel.org/stable/c/8f88c78d24f6f346919007cd459fd7e51a8c7779
- https://git.kernel.org/stable/c/be1ca30331c7923c6f376610c1bd6059be9b1908
- https://git.kernel.org/stable/c/c38023032a598ec6263e008d62c7f02def72d5c7
- https://git.kernel.org/stable/c/b67ad6170c0ea87391bb253f35d1f78857736e54
- https://git.kernel.org/stable/c/e372ecd455b6ebc7720f52bf4b5f5d44d02f2092
- https://git.kernel.org/stable/c/db044d97460ea792110eb8b971e82569ded536c6
- https://git.kernel.org/stable/c/e43669c77cb3a742b7d84ecdc7c68c4167a7709b
- https://git.kernel.org/stable/c/839ec7039513a4f84bfbaff953a9393471176bee
- https://git.kernel.org/stable/c/47934e06b65637c88a762d9c98329ae6e3238888