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Huawei EulerOS: CVE-2021-47077: kernel security update

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Huawei EulerOS: CVE-2021-47077: kernel security update

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
03/01/2024
Created
07/23/2024
Added
07/23/2024
Modified
01/28/2025

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: qedf: Add pointer checks in qedf_update_link_speed() The following trace was observed: [ 14.042059] Call Trace: [ 14.042061]<IRQ> [ 14.042068]qedf_link_update+0x144/0x1f0 [qedf] [ 14.042117]qed_link_update+0x5c/0x80 [qed] [ 14.042135]qed_mcp_handle_link_change+0x2d2/0x410 [qed] [ 14.042155]? qed_set_ptt+0x70/0x80 [qed] [ 14.042170]? qed_set_ptt+0x70/0x80 [qed] [ 14.042186]? qed_rd+0x13/0x40 [qed] [ 14.042205]qed_mcp_handle_events+0x437/0x690 [qed] [ 14.042221]? qed_set_ptt+0x70/0x80 [qed] [ 14.042239]qed_int_sp_dpc+0x3a6/0x3e0 [qed] [ 14.042245]tasklet_action_common.isra.14+0x5a/0x100 [ 14.042250]__do_softirq+0xe4/0x2f8 [ 14.042253]irq_exit+0xf7/0x100 [ 14.042255]do_IRQ+0x7f/0xd0 [ 14.042257]common_interrupt+0xf/0xf [ 14.042259]</IRQ> API qedf_link_update() is getting called from QED but by that time shost_data is not initialised. This results in a NULL pointer dereference when we try to dereference shost_data while updating supported_speeds. Add a NULL pointer check before dereferencing shost_data.

Solution(s)

  • huawei-euleros-2_0_sp8-upgrade-bpftool
  • huawei-euleros-2_0_sp8-upgrade-kernel
  • huawei-euleros-2_0_sp8-upgrade-kernel-devel
  • huawei-euleros-2_0_sp8-upgrade-kernel-headers
  • huawei-euleros-2_0_sp8-upgrade-kernel-tools
  • huawei-euleros-2_0_sp8-upgrade-kernel-tools-libs
  • huawei-euleros-2_0_sp8-upgrade-perf
  • huawei-euleros-2_0_sp8-upgrade-python-perf
  • huawei-euleros-2_0_sp8-upgrade-python3-perf

References

  • https://attackerkb.com/topics/cve-2021-47077
  • CVE - 2021-47077
  • EulerOS-SA-2024-2476
  • 查看数 710
  • 已创建
  • 最后回复

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