High severity7.8NVD Advisory· Published Mar 25, 2024· Updated Aug 4, 2026
CVE-2021-47159
CVE-2021-47159
Description
In the Linux kernel, the following vulnerability has been resolved:
net: dsa: fix a crash if ->get_sset_count() fails
If ds->ops->get_sset_count() fails then it "count" is a negative error code such as -EOPNOTSUPP. Because "i" is an unsigned int, the negative error code is type promoted to a very high value and the loop will corrupt memory until the system crashes.
Fix this by checking for error codes and changing the type of "i" to just int.
Affected products
28cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 5 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=4.7,<4.19.193
- cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*
- (no CPE)
- (no CPE)range: 4.7
- osv-coords22 versionspkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2012%20SP5pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5pkg:rpm/suse/kernel-rt_debug&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_56&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5
< 4.12.14-16.182.1+ 21 more
- (no CPE)range: < 4.12.14-16.182.1
- (no CPE)range: < 4.12.14-16.182.1
- (no CPE)range: < 4.12.14-122.216.1
- (no CPE)range: < 4.12.14-122.216.1
- (no CPE)range: < 4.12.14-122.216.1
- (no CPE)range: < 4.12.14-122.216.1
- (no CPE)range: < 4.12.14-122.216.1
- (no CPE)range: < 4.12.14-122.216.1
- (no CPE)range: < 4.12.14-122.216.1
- (no CPE)range: < 4.12.14-10.182.1
- (no CPE)range: < 4.12.14-10.182.1
- (no CPE)range: < 4.12.14-122.216.1
- (no CPE)range: < 4.12.14-122.216.1
- (no CPE)range: < 4.12.14-16.182.1
- (no CPE)range: < 4.12.14-16.182.1
- (no CPE)range: < 4.12.14-10.182.1
- (no CPE)range: < 4.12.14-122.216.1
- (no CPE)range: < 4.12.14-122.216.1
- (no CPE)range: < 4.12.14-16.182.1
- (no CPE)range: < 4.12.14-16.182.1
- (no CPE)range: < 4.12.14-10.182.1
- (no CPE)range: < 1-8.3.1
Patches
Vulnerability mechanics
References
5- git.kernel.org/stable/c/0f2cb08c57edefb0e7b5045e0e3e9980a3d3aa37nvdPatch
- git.kernel.org/stable/c/7b22466648a4f8e3e94f57ca428d1531866d1373nvdPatch
- git.kernel.org/stable/c/a269333fa5c0c8e53c92b5a28a6076a28cde3e83nvdPatch
- git.kernel.org/stable/c/caff86f85512b8e0d9830e8b8b0dfe13c68ce5b6nvdPatch
- git.kernel.org/stable/c/ce5355f140a7987011388c7e30c4f8fbe180d3e8nvdPatch
News mentions
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