7.8

CVE-2026-74283: linux

CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-74283DEBIAN-CVE-2026-74283
Published 15-08-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-74283 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.8% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 30 · Related 30
OPENSUSE-SU-2026:22091-1SUSE-SU-2026:24179-1SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1SUSE-SU-2026:24184-1SUSE-SU-2026:24197-1

Timeline

  1. 15-08-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: tipc: require net admin for TIPCv2 netlink mutators TIPCv2 registers mutating generic-netlink operations without admin permission flags. Generic netlink only checks CAP_NET_ADMIN when an operation sets GENL_ADMIN_PERM or GENL_UNS_ADMIN_PERM, so a local unprivileged process can currently change TIPC state through commands such as TIPC_NL_NET_SET, TIPC_NL_KEY_SET, TIPC_NL_KEY_FLUSH, and bearer enable/disable. The legacy TIPC netlink API already checks netlink_net_capable(..., CAP_NET_ADMIN) for administrative commands. Give the TIPCv2 mutators the equivalent generic-netlink gate. Use GENL_UNS_ADMIN_PERM, which maps to the same namespace-aware CAP_NET_ADMIN check that netlink_net_capable() performs, so the behaviour matches the legacy path and keeps working for CAP_NET_ADMIN holders in a non-initial user namespace (containers). A QEMU/KASAN repro run as uid/gid 65534 with zero effective capabilities previously succeeded in changing the network id and node identity, setting and flushing key material, and enabling/disabling a UDP bearer. With this patch applied the same operations fail with -EPERM.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

+0.01 pp

From 0.16% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.17%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu169 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-147.147 | < 7.0.0-38.38
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1067.70 | < 7.0.0-1014.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.180-1 | < 6.12.100-1 | < 7.1.5-1
Linux1 product
  • linux≥ 0655f6a8635b1b66f2434d5556b1044c14b1ccaf, < b06fb5f78a9af0929aaa47c92d0b7bca0617fb25 | ≥ 0655f6a8635b1b66f2434d5556b1044c14b1ccaf, < 52864c6c13dcc292481eabfeb3c31a86c3ec06f2 | ≥ 0655f6a8635b1b66f2434d5556b1044c14b1ccaf, < e87dcc1a644d087de0bb6c94c6dd28c29b89597f | ≥ 0655f6a8635b1b66f2434d5556b1044c14b1ccaf, < 9b937de4b3ded62a24da6e8d9d623cdb2748fa74 | ≥ 0655f6a8635b1b66f2434d5556b1044c14b1ccaf, < c9668a4adb2264625daeeabc7466b783badd4614 | ≥ 0655f6a8635b1b66f2434d5556b1044c14b1ccaf, < cebaefe1aceb650d5c99a4c0e1a4dde09e211818 | ≥ 0655f6a8635b1b66f2434d5556b1044c14b1ccaf, < 56f0a2e0a1d004e025cd031c3a801ab73959269f | ≥ 0655f6a8635b1b66f2434d5556b1044c14b1ccaf, < 86b0c540e2ea397cde021eecd24145f7c16a3d4e | 3.19

3 vendors · 171 products

References

27 links
Show all 27 references