5.6

CVE-2022-26356: debian debian_linux Improper Locking

Modified
AliasesALPINE-CVE-2022-26356UBUNTU-CVE-2022-26356DEBIAN-CVE-2022-26356
Published 05-04-2022Last modified 03-08-2024

Vulnerability summary

CVE-2022-26356 is a medium (CVSS 5.6) Improper Locking vulnerability in debian debian_linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.6, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.6/10
010
Medium · v3.1 (NVD)
EPSS score
0.24%
0%100%
Low · 0.00 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 10 · Related 9
DSA-5117-1OPENSUSE-SU-2024:11979-1SUSE-SU-2022:1285-1SUSE-SU-2022:1300-1SUSE-SU-2022:1359-1SUSE-SU-2022:1375-1

Timeline

  1. 05-04-2022
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. A suitably timed call to XEN_DMOP_track_dirty_vram can enable log dirty while another CPU is still in the process of tearing down the structures related to a previously enabled log dirty mode (XEN_DOMCTL_SHADOW_OP_OFF). This is due to lack of mutually exclusive locking between both operations and can lead to entries being added in already freed slots, resulting in a memory leak.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.24% on 04-10-2026

04-10-202603-11-2026

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

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Debian2 products
Alpine1 product
  • xen≥ 4.0.0, < 4.13.4-r3 | ≥ 4.0.0, < 4.14.5-r0 | ≥ 4.0.0, < 4.15.2-r2 | ≥ 4.0.0, < 4.16.1-r0
Fedoraproject1 product
Ubuntu1 product
  • xenAll versions (No fix recorded)
Xen1 product
  • xen≥ 4.0.0, < 4.12.0 | ≥ 4.13.0, < 4.14.0 | ≥ 4.15.0, < 4.16.0

5 vendors · 6 products

References

12 links
Show all 12 references