CVE-2026-23056: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2026-23056DEBIAN-CVE-2026-23056
Published 04-02-2026Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2026-23056 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.1% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.21%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 44 · Related 38
DLA-4475-1DLA-4476-1DSA-6126-1DSA-6127-1MGASA-2026-0097MGASA-2026-0098

Timeline

  1. 04-02-2026
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: uacce: implement mremap in uacce_vm_ops to return -EPERM The current uacce_vm_ops does not support the mremap operation of vm_operations_struct. Implement .mremap to return -EPERM to remind users. The reason we need to explicitly disable mremap is that when the driver does not implement .mremap, it uses the default mremap method. This could lead to a risk scenario: An application might first mmap address p1, then mremap to p2, followed by munmap(p1), and finally munmap(p2). Since the default mremap copies the original vma's vm_private_data (i.e., q) to the new vma, both munmap operations would trigger vma_close, causing q->qfr to be freed twice(qfr will be set to null here, so repeated release is ok).

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

+0.02 pp

From 0.18% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.21%

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

Ubuntu144 products
  • linux< 5.15.0-176.186 | < 6.8.0-117.117 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1105.112 | < 6.8.0-1055.58 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.162-1 | < 6.12.69-1 | < 6.18.8-1
Linux1 product
  • linux≥ 015d239ac0142ad0e26567fd890ef8d171f13709, < 78d99f062d42e3af2ca46bde1a8e46e0dfd372e3 | ≥ 015d239ac0142ad0e26567fd890ef8d171f13709, < ebfa85658a39b49ec3901ceea7535b73aa0429e6 | ≥ 015d239ac0142ad0e26567fd890ef8d171f13709, < 75b29bdc935ff93b8e8bf6f6b4d8a4810b26e06f | ≥ 015d239ac0142ad0e26567fd890ef8d171f13709, < 4c042bc71474dbe417c268f4bfb8ec196f802f07 | ≥ 015d239ac0142ad0e26567fd890ef8d171f13709, < a407ddd61b3e6afc5ccfcd1478797171cf5686ee | ≥ 015d239ac0142ad0e26567fd890ef8d171f13709, < ba29b59d124e725e0377f09b2044909c91d657a1 | ≥ 015d239ac0142ad0e26567fd890ef8d171f13709, < 02695347be532b628f22488300d40c4eba48b9b7 | 5.7

3 vendors · 146 products

References

39 links
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