CVE-2021-47548ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()
- 9.8CriticalCVSS base score
- 1.4%Exploitation in 30 daysEPSS · top 28% 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: ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port() The if statement: if (port >= DSAF_GE_NUM) return; limits the value of port less than DSAF_GE_NUM (i.e., 8). However, if the value of port is 6 or 7, an array overflow could occur: port_rst_off = dsaf_dev->mac_cb[port]->port_rst_off; because the length of dsaf_dev->mac_cb is DSAF_MAX_PORT_NUM (i.e., 6). To fix this possible array overflow, we first check port and if it is greater than or equal to DSAF_MAX_PORT_NUM, the function returns.
Timeline
ID reserved
By Linux
Published
- 24 months later
· 24 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 |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 1.4% · top 28% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 850bfa3b78ea8849fef78ed74f5f2ccf947db0ca – < 948968f8747650447c8f21c9fdba0e1973be040b
- affected 850bfa3b78ea8849fef78ed74f5f2ccf947db0ca – < abbd5faa0748d0aa95d5191d56ff7a17a6275bd1
- affected 850bfa3b78ea8849fef78ed74f5f2ccf947db0ca – < dd07f8971b81ad98cc754b179b331b57f35aa1ff
- affected 850bfa3b78ea8849fef78ed74f5f2ccf947db0ca – < 99bb25cb6753beaf2c2bc37927c2ecc0ceff3f6d
- affected 850bfa3b78ea8849fef78ed74f5f2ccf947db0ca – < 22519eff7df2d88adcc2568d86046ce1e2b52803
- affected 850bfa3b78ea8849fef78ed74f5f2ccf947db0ca – < fc7ffa7f10b9454a86369405d9814bf141b30627
- affected 850bfa3b78ea8849fef78ed74f5f2ccf947db0ca – < a66998e0fbf213d47d02813b9679426129d0d114
- affected 4.7
- unaffected < 4.7
- unaffected 4.9.292 – ≤ 4.9.*
- unaffected 4.14.257 – ≤ 4.14.*
- unaffected 4.19.220 – ≤ 4.19.*
- unaffected 5.4.164 – ≤ 5.4.*
- unaffected 5.10.84 – ≤ 5.10.*
- unaffected 5.15.7 – ≤ 5.15.*
- unaffected 5.16 – ≤ *
References
References7
- https://git.kernel.org/stable/c/948968f8747650447c8f21c9fdba0e1973be040b (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/abbd5faa0748d0aa95d5191d56ff7a17a6275bd1 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/dd07f8971b81ad98cc754b179b331b57f35aa1ff (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/99bb25cb6753beaf2c2bc37927c2ecc0ceff3f6d (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/22519eff7df2d88adcc2568d86046ce1e2b52803 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/fc7ffa7f10b9454a86369405d9814bf141b30627 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/a66998e0fbf213d47d02813b9679426129d0d114 (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)
- EUVD EUVD-2021-34550 (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-2021-47548)Record last updated .