5.7

CVE-2026-100071: linux

CVSS: 5.7v4.0MediumUndergoing analysis
AliasesUBUNTU-CVE-2026-100071DEBIAN-CVE-2026-100071
Published 25-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-100071 is a medium (CVSS 5.7) vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 4.8% of scored vulnerabilities.

Overall risk
23/100
0100
Low · default modelHow is this calculated?
CVSS score
5.7/10
010
Medium · v4.0 (OSV · Ubuntu), selected by version preference
EPSS score
0.16%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 1
MGASA-2026-0506OPENSUSE-SU-2026:12074-1

Timeline

  1. 25-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: hsr: free learned nodes on device setup failure hsr_dev_finalize() can fail after a lower-device RX handler has already been registered (slave A is added before the failable slave B and interlink adds). RX handlers run in softirq regardless of the master's state, so frames received in that window can learn dynamic nodes into node_db, and the error unwind never releases them. Free both owned dynamic databases in the unwind, mirroring hsr_dellink(). proxy_node_db is provably empty on every current error exit (only interlink RX feeds it, and the interlink add is the last failable step) and is freed for symmetry. The order is safe: hsr_del_port() unregisters each RX handler with synchronize_net() before hsr_del_nodes() runs, which removes remaining entries with list_del_rcu() and defers their release with call_rcu() for readers already under RCU.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

26-09-202619-10-2026
EPSS score
0.16%

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)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.111-1 | < 7.2.6-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8, < e691eee886871b933d772ffc76d66c80b4c0a25e | ≥ 81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8, < 0a340ffd96943a49a78e367efac9517ca767d99b | ≥ 81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8, < f7289e3492f2694dccd3d79287e0e31879b58650 | ≥ 81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8, < 65702339b3e9fd792f65d4b740928798194d86ce | ≥ 81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8, < 49b01f2939abc676a6f9a118f07a10110ee5f683 | ≥ 81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8, < 7f16289b91eb316f170a6bd22d32e6c632f6a5b6 | 3.17

3 vendors · 172 products

References

10 links