7.8

CVE-2026-72389: linux

CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-72389DEBIAN-CVE-2026-72389
Published 15-08-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-72389 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.3% 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
0.16%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 33 · Related 33
OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23477-1SUSE-SU-2026:23481-1SUSE-SU-2026:23528-1SUSE-SU-2026:23529-1SUSE-SU-2026:23881-1

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: bridge: stp: Fix a potential use-after-free when deleting a bridge The three STP timers are not supposed to be armed while the bridge is administratively down. They are synchronously deactivated when the bridge is put administratively down and the various call sites check for 'IFF_UP' before arming them. This check is missing from br_topology_change_detection() and it is possible to engineer a situation in which the topology change timer is armed while the bridge is administratively down, resulting in a use-after-free [1] when the bridge is deleted. Fix by adding the missing check and for good measures synchronously shutdown the three timers when the bridge is deleted. [1] ODEBUG: free active (active state 0) object: ffff88811662b9b0 object type: timer_list hint: br_topology_change_timer_expired (net/bridge/br_stp_timer.c:120) WARNING: lib/debugobjects.c:629 at debug_print_object+0x1bc/0x450, CPU#9: ip/359

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

0.00 pp

From 0.16% on 21-09-2026

21-09-202621-10-2026
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) | < 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≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < c86579b0a2d201792bcb59316629f4ba4758cfc8 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 297a747f59bff6573196d7236178144d66524e68 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 4c40eec06eeac37c58e47a6058eb32901218d5d4 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 39283907a25e5caf0f2bd2947f6e56644b01e2b7 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b4b3458ef88df4798632619f018791d4344bcd92 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 40cbfa3a28e0919469d1b086629bb3ce38a83593 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2a00517db8de4be7df3d483b215c5544fb30a191 | 2.6.12

3 vendors · 171 products

References

26 links
Show all 26 references