Read the docs
TI-2021-22196 Aliases CVE-2021-47548

ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()

Priority MEDIUM 52CWE-129Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 19 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-129 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01358 71st percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.9.292, 4.14.257, 4.19.220 +4Red Hat: 7 advisoriesRed Hat: 19 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux4.7 and later4.9.292, 4.14.257, 4.19.220, 5.4.164, 5.10.84, 5.15.7, 5.16Patch availableCNA
  • Linux VendorLinux Affected 4.7 and later Fixed in 4.9.292, 4.14.257, 4.19.220, 5.4.164, 5.10.84, 5.15.7, 5.16 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 4.9.292; 4.10 to before 4.14.257; 4.15 to before 4.19.220; 4.20 to before 5.4.164; 5.5 to before 5.10.84; 5.11 to before 5.15.7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*5.16 rc1VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 4.9.292; 4.10 to before 4.14.257; 4.15 to before 4.19.220; 4.20 to before 5.4.164; 5.5 to before 5.10.84; 5.11 to before 5.15.7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:* Versions 5.16 rc1 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 4.9.292, 4.14.257, 4.19.220, 5.4.164, 5.10.84, 5.15.7, 5.16

Red Hat 7 advisories

  • RHSA-2024:5101 Released 2024-08-08 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.16.1.el8_10, kernel-4.18.0-553.16.1.el8_10, kernel-abi-stablelists-4.18.0-553.16.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.16.1.el8_10
  • RHSA-2024:5102 Released 2024-08-08 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-core-4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-debug-4.18.0-553.16.1.rt7.357.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-core-4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-debug-4.18.0-553.16.1.rt7.357.el8_10 +7
  • RHSA-2024:4902 Released 2024-07-29 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.113.1.el8_6, kernel-4.18.0-372.113.1.el8_6, kernel-abi-stablelists-4.18.0-372.113.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.113.1.el8_6, kernel-4.18.0-372.113.1.el8_6, kernel-abi-stablelists-4.18.0-372.113.1.el8_6 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.6) bpftool-4.18.0-372.113.1.el8_6, kernel-4.18.0-372.113.1.el8_6, kernel-abi-stablelists-4.18.0-372.113.1.el8_6 +14
Show 4 more Red Hat advisories
  • RHSA-2024:4740 Released 2024-07-23 · Red Hat rating Moderate
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-tools-libs-devel-4.18.0-477.64.1.el8_8
    • Red Hat Enterprise Linux BaseOS EUS (v.8.8) bpftool-4.18.0-477.64.1.el8_8, kernel-4.18.0-477.64.1.el8_8, kernel-abi-stablelists-4.18.0-477.64.1.el8_8 +19
  • RHSA-2024:4583 Released 2024-07-17 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-427.26.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.26.1.el9_4, kernel-64k-devel-5.14.0-427.26.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.3.0-427.26.1.el9_4, kernel-5.14.0-427.26.1.el9_4, kernel-64k-5.14.0-427.26.1.el9_4 +29
    • Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-427.26.1.el9_4, libperf-5.14.0-427.26.1.el9_4
    • Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-427.26.1.el9_4, kernel-rt-core-5.14.0-427.26.1.el9_4, kernel-rt-debug-5.14.0-427.26.1.el9_4 +11
    • Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-427.26.1.el9_4, kernel-rt-core-5.14.0-427.26.1.el9_4, kernel-rt-debug-5.14.0-427.26.1.el9_4 +9
  • RHSA-2024:4554 Released 2024-07-15 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt-5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-core-5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-debug-5.14.0-284.73.1.rt14.358.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt-5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-core-5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-debug-5.14.0-284.73.1.rt14.358.el9_2 +11
  • RHSA-2024:4533 Released 2024-07-15 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-tools-libs-devel-5.14.0-284.73.1.el9_2
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-64k-debug-devel-5.14.0-284.73.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.73.1.el9_2, kernel-64k-devel-5.14.0-284.73.1.el9_2 +9
    • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool-7.0.0-284.73.1.el9_2, kernel-5.14.0-284.73.1.el9_2, kernel-64k-5.14.0-284.73.1.el9_2 +29

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.8.8)Fixed RHSA-2024:4740
Red Hat CodeReady Linux Builder EUS (v.9.2)Fixed RHSA-2024:4533
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:4583
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2024:4533
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2024:5101
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2024:4583
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2024:4902
Red Hat Enterprise Linux BaseOS E4S (v.8.6)Fixed RHSA-2024:4902
Red Hat Enterprise Linux BaseOS EUS (v.8.8)Fixed RHSA-2024:4740
Red Hat Enterprise Linux BaseOS EUS (v.9.2)Fixed RHSA-2024:4533
Red Hat Enterprise Linux BaseOS TUS (v.8.6)Fixed RHSA-2024:4902
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2024:5101
Red Hat Enterprise Linux CRB (v. 9)Fixed RHSA-2024:4583
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2024:5102
Red Hat Enterprise Linux NFV (v. 9)Fixed RHSA-2024:4583
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2024:5102
Red Hat Enterprise Linux RT (v. 9)Fixed RHSA-2024:4583
Red Hat Enterprise Linux Real Time EUS (v.9.2)Fixed RHSA-2024:4554
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2)Fixed RHSA-2024:4554
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux AppStream EUS (v.9.2)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-47548

References

Patch 7

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences