net: fix information leakage in /proc/net/ptype
Priority LOW 31CWE-668Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Partial Red Hat: 6 fixed, 3 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00222 12th percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.4.302, 4.9.300, 4.14.265 +6Red Hat: 3 advisoriesRed Hat: 6 fixed, 3 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.26 and later | 4.4.302, 4.9.300, 4.14.265, 4.19.228, 5.4.176, 5.10.96, 5.15.19, 5.16.5, 5.17 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.26 and later Fixed in 4.4.302, 4.9.300, 4.14.265, 4.19.228, 5.4.176, 5.10.96, 5.15.19, 5.16.5, 5.17 Patch available CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 2.6.26 to before 4.4.302; 4.5 to before 4.9.300; 4.10 to before 4.14.265; 4.15 to before 4.19.228; 4.20 to before 5.4.176; 5.5 to before 5.10.96; 5.11 to before 5.15.19; 5.16 to before 5.16.5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.17:rc1:*:*:*:*:*:* | 5.17 rc1 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.26 to before 4.4.302; 4.5 to before 4.9.300; 4.10 to before 4.14.265; 4.15 to before 4.19.228; 4.20 to before 5.4.176; 5.5 to before 5.10.96; 5.11 to before 5.15.19; 5.16 to before 5.16.5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.17:rc1:*:*:*:*:*:* Versions 5.17 rc1 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.4.302, 4.9.300, 4.14.265, 4.19.228, 5.4.176, 5.10.96, 5.15.19, 5.16.5, 5.17
Red Hat 3 advisories
- RHSA-2024:6206 Released 2024-09-03 · Red Hat rating Importantkernel security update
- Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-tools-libs-devel-4.18.0-477.70.1.el8_8
- Red Hat Enterprise Linux BaseOS EUS (v.8.8) bpftool-4.18.0-477.70.1.el8_8, kernel-4.18.0-477.70.1.el8_8, kernel-abi-stablelists-4.18.0-477.70.1.el8_8 +19
- RHSA-2024:5101 Released 2024-08-08 · Red Hat rating Importantkernel 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
- RHSA-2024:5102 Released 2024-08-08 · Red Hat rating Importantkernel-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
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat CodeReady Linux Builder EUS (v.8.8) | Fixed | RHSA-2024:6206 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2024:5101 |
| Red Hat Enterprise Linux BaseOS EUS (v.8.8) | Fixed | RHSA-2024:6206 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2024:5101 |
| Red Hat Enterprise Linux NFV (v. 8) | Fixed | RHSA-2024:5102 |
| Red Hat Enterprise Linux RT (v. 8) | Fixed | RHSA-2024:5102 |
Timeline
- 2026-10-02 Threatist record created from CVE-2022-48757
- 2026-10-03 Alias added: GHSA-vvvp-c6hw-m8pj
References
Patch 9
- 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
More Linux Kernel vulnerabilities
- 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
Sources
- CVE-2022-48757 · CVE Program
- CVE-2022-48757 · NVD
- FIRST EPSS
- GHSA-vvvp-c6hw-m8pj · GitHub Advisory Database · CC BY 4.0
- CVE-2022-48757 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences