CVE-2023-52996ipv4: prevent potential spectre v1 gadget in fib_metrics_match()
- 5.5MediumCVSS base score
- 0.27%Exploitation in 30 daysEPSS · top 81% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: ipv4: prevent potential spectre v1 gadget in fib_metrics_match() if (!type) continue; if (type > RTAX_MAX) return false; ... fi_val = fi->fib_metrics->metrics[type - 1]; @type being used as an array index, we need to prevent cpu speculation or risk leaking kernel memory content.
Timeline
ID reserved
By Linux
Published
- 14 months later
· 14 months 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 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.27% · top 81% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8 – < 8f0eb24f1a7a60ce635f0d757a46f1a37a4d467d
- affected 5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8 – < 7f9828fb1f688210e681268490576f0ca65c322a
- affected 5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8 – < ca3cf947760de050d558293002ad3e7f4b8745d2
- affected 5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8 – < f9753ebd61be2d957b5504cbd3fd719674f05b7a
- affected 5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8 – < 5e9398a26a92fc402d82ce1f97cc67d832527da0
- affected 4.14
- unaffected < 4.14
- unaffected 5.4.231 – ≤ 5.4.*
- unaffected 5.10.166 – ≤ 5.10.*
- unaffected 5.15.91 – ≤ 5.15.*
- unaffected 6.1.9 – ≤ 6.1.*
- unaffected 6.2 – ≤ *
References
References5
- https://git.kernel.org/stable/c/8f0eb24f1a7a60ce635f0d757a46f1a37a4d467d (opens in a new tab)
- https://git.kernel.org/stable/c/7f9828fb1f688210e681268490576f0ca65c322a (opens in a new tab)
- https://git.kernel.org/stable/c/ca3cf947760de050d558293002ad3e7f4b8745d2 (opens in a new tab)
- https://git.kernel.org/stable/c/f9753ebd61be2d957b5504cbd3fd719674f05b7a (opens in a new tab)
- https://git.kernel.org/stable/c/5e9398a26a92fc402d82ce1f97cc67d832527da0 (opens in a new tab)
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)
- EUVD EUVD-2023-59724 (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://cveledger.app/cve/CVE-2023-52996)Record last updated .