CVE-2023-52633
um: time-travel: fix time corruption
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Timeline
ID reserved
By Linux
- 27 days later
· 27 days later
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.0 | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.23% · top 87% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Weakness
Affected products
- affected 065038706f77a56754e8f0c2556dab7e22dfe577 – < 0c7478a2da3f5fe106b4658338873d50c86ac7ab
- affected 065038706f77a56754e8f0c2556dab7e22dfe577 – < 4f7dad73df4cdb2b7042103d3922745d040ad025
- affected 065038706f77a56754e8f0c2556dab7e22dfe577 – < de3e9d8e8d1ae0a4d301109d1ec140796901306c
- affected 065038706f77a56754e8f0c2556dab7e22dfe577 – < b427f55e9d4185f6f17cc1e3296eb8d0c4425283
- affected 065038706f77a56754e8f0c2556dab7e22dfe577 – < abe4eaa8618bb36c2b33e9cdde0499296a23448c
- affected 5.3
- unaffected < 5.3
- unaffected 5.15.149 – ≤ 5.15.*
- unaffected 6.1.77 – ≤ 6.1.*
- unaffected 6.6.16 – ≤ 6.6.*
- unaffected 6.7.4 – ≤ 6.7.*
- unaffected 6.8 – ≤ *
References (5)
- https://git.kernel.org/stable/c/0c7478a2da3f5fe106b4658338873d50c86ac7ab (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/4f7dad73df4cdb2b7042103d3922745d040ad025 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/de3e9d8e8d1ae0a4d301109d1ec140796901306c (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/b427f55e9d4185f6f17cc1e3296eb8d0c4425283 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/abe4eaa8618bb36c2b33e9cdde0499296a23448c (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-52633)Record last updated .