CVE-2026-80689: tracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions

Received
AliasesUBUNTU-CVE-2026-80689DEBIAN-CVE-2026-80689
Published 28-08-2026Last modified 14-09-2026

Vulnerability summary

CVE-2026-80689 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.2% of scored vulnerabilities.

Priority
Insufficient evidence

No CVSS vector published; no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.18%
0%100%
Low · -0.04 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 4
USN-8959-1USN-8960-1USN-8961-1USN-8962-1USN-8963-1

Timeline

  1. 28-08-2026
    PublishedVulnerability first disclosed.
  2. 14-09-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: tracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions mmio_trace_rw() and mmio_trace_mapping() retrieve mmio_trace_array into tr and pass it to __trace_mmiotrace_rw() and __trace_mmiotrace_map(). If these functions are invoked while mmio_trace_array is NULL (e.g. before initialization or after disabled), accessing tr->array_buffer.buffer will result in a NULL pointer dereference crash. Fix this by adding an explicit NULL check for tr at the beginning of __trace_mmiotrace_rw() and __trace_mmiotrace_map().

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

Decrease -0.04 pp

From 0.22% on 06-10-2026

06-10-202605-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: not stated in public data.

Ubuntu169 products
  • linuxAll versions (No fix recorded) | < 5.15.0-202.212 | < 7.0.0-42.42
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1119.126 | < 7.0.0-1016.17
  • 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 | < 6.12.105-1 | < 7.1.8-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ f984b51e0779a6dd30feedc41404013ca54e5d05, < dc1b1a057b3bb901f83433700e604fe0ae67c5f2 | ≥ f984b51e0779a6dd30feedc41404013ca54e5d05, < 6aee2d478545c089dd5d055d3c9f0c7ea034fb80 | ≥ f984b51e0779a6dd30feedc41404013ca54e5d05, < 4e4ab09db7899d7f2d2293a18adf0fa200a27e73 | ≥ f984b51e0779a6dd30feedc41404013ca54e5d05, < 2df964d141270c40f07547b0c2e0a51e2573d46d | ≥ f984b51e0779a6dd30feedc41404013ca54e5d05, < 876014b4eeb927146430e7591cf959a7ceb8d64a | ≥ f984b51e0779a6dd30feedc41404013ca54e5d05, < a20a0010eb6485f60cd64e15ebc85a4bd388642e | ≥ f984b51e0779a6dd30feedc41404013ca54e5d05, < 60234845142fddb27db89ebc00a65178421fb3a4 | ≥ f984b51e0779a6dd30feedc41404013ca54e5d05, < 12b80cdbc54cf615b4717a4e8180063408091ea2 | 2.6.27

3 vendors · 172 products

References

17 links
Show all 17 references