High severity7.8NVD Advisory· Published May 21, 2024· Updated Jun 17, 2026

CVE-2021-47301

Description

In the Linux kernel, the following vulnerability has been resolved:

igb: Fix use-after-free error during reset

Cleans the next descriptor to watch (next_to_watch) when cleaning the TX ring.

Failure to do so can cause invalid memory accesses. If igb_poll() runs while the controller is reset this can lead to the driver try to free a skb that was already freed.

(The crash is harder to reproduce with the igb driver, but the same potential problem exists as the code is identical to igc)

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Linux/Kernel4 versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 3 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=4.12,<4.14.241
- cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*
- (no CPE)
- (no CPE)range: 4.12
osv-coords89 versions
pkg:rpm/suse/kernel-64kb&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP2 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP3 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP2 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP3 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Micro%205.1 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Micro%205.2 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2012%20SP5 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Micro%205.1 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Micro%205.2 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3 pkg:rpm/suse/kernel-docs&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5 pkg:rpm/suse/kernel-livepatch-SLE15-SP2_Update_49&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP2 pkg:rpm/suse/kernel-livepatch-SLE15-SP3_Update_45&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP3 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5 pkg:rpm/suse/kernel-preempt&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3 pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.1 pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.2 pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5 pkg:rpm/suse/kernel-rt_debug&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5 pkg:rpm/suse/kernel-source&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3 pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.1 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.2 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5 pkg:rpm/suse/kernel-syms&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_57&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5
< 5.3.18-150300.59.164.1+ 88 more
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150300.59.164.1.150300.18.96.1
- (no CPE)range: < 5.3.18-150200.24.194.1.150200.9.99.1
- (no CPE)range: < 5.3.18-150300.59.164.1.150300.18.96.1
- (no CPE)range: < 5.3.18-150300.59.164.1.150300.18.96.1
- (no CPE)range: < 5.3.18-150300.59.164.1.150300.18.96.1
- (no CPE)range: < 5.3.18-150200.24.194.1.150200.9.99.1
- (no CPE)range: < 5.3.18-150300.59.164.1.150300.18.96.1
- (no CPE)range: < 5.3.18-150200.24.194.1.150200.9.99.1
- (no CPE)range: < 5.3.18-150300.59.164.1.150300.18.96.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 1-150200.5.3.1
- (no CPE)range: < 1-150300.7.3.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150300.172.1
- (no CPE)range: < 5.3.18-150300.172.1
- (no CPE)range: < 4.12.14-10.188.1
- (no CPE)range: < 4.12.14-10.188.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 5.3.18-150300.172.1
- (no CPE)range: < 5.3.18-150300.172.1
- (no CPE)range: < 4.12.14-10.188.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 4.12.14-10.188.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 1-8.3.1

cvss	0.507
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

CVE-2021-47301

Description

AI Insight

Affected products

Patches

Vulnerability mechanics

References

News mentions