5

CVE-2023-52633: linux Out-of-bounds Write

CVSS: 5.0v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2023-52633DEBIAN-CVE-2023-52633
Published 02-04-2024Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2023-52633 is a medium (CVSS 5.0) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 12.4% of scored vulnerabilities.

Overall risk
20/100
0100
Low · default modelHow is this calculated?
CVSS score
5.0/10
010
Medium · v3.1 (NVD)
EPSS score
0.23%
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 11 · Related 14
USN-6766-1USN-6766-2USN-6766-3USN-6795-1USN-6818-1USN-6818-3

Timeline

  1. 02-04-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: um: time-travel: fix time corruption In 'basic' time-travel mode (without =inf-cpu or =ext), we still get timer interrupts. These can happen at arbitrary points in time, i.e. while in timer_read(), which pushes time forward just a little bit. Then, if we happen to get the interrupt after calculating the new time to push to, but before actually finishing that, the interrupt will set the time to a value that's incompatible with the forward, and we'll crash because time goes backwards when we do the forwarding. Fix this by reading the time_travel_time, calculating the adjustment, and doing the adjustment all with interrupts disabled.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

0.00 pp

From 0.23% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.23%

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

Affected systems

Ubuntu46 products
  • linux< 5.15.0-106.116
  • linux-aws< 5.15.0-1061.67
  • linux-aws-5.15< 5.15.0-1061.67~20.04.1
  • linux-aws-fips< 5.15.0-1061.67+fips1
  • linux-azure< 5.15.0-1063.72
Linux2 products
  • linux≥ 065038706f77a56754e8f0c2556dab7e22dfe577, < 0c7478a2da3f5fe106b4658338873d50c86ac7ab | ≥ 065038706f77a56754e8f0c2556dab7e22dfe577, < 4f7dad73df4cdb2b7042103d3922745d040ad025 | ≥ 065038706f77a56754e8f0c2556dab7e22dfe577, < de3e9d8e8d1ae0a4d301109d1ec140796901306c | ≥ 065038706f77a56754e8f0c2556dab7e22dfe577, < b427f55e9d4185f6f17cc1e3296eb8d0c4425283 | ≥ 065038706f77a56754e8f0c2556dab7e22dfe577, < abe4eaa8618bb36c2b33e9cdde0499296a23448c | 5.3
  • linux_kernel< 5.15.149 | ≥ 5.16, < 6.1.77 | ≥ 6.2, < 6.6.16 | ≥ 6.7, < 6.7.4
Debian1 product
  • linux< 6.1.82-1 | < 6.7.7-1

3 vendors · 49 products

References

22 links
Show all 22 references