High severity7.8NVD Advisory· Published May 21, 2024· Updated Aug 4, 2026
CVE-2021-47248
CVE-2021-47248
Description
In the Linux kernel, the following vulnerability has been resolved:
udp: fix race between close() and udp_abort()
Kaustubh reported and diagnosed a panic in udp_lib_lookup(). The root cause is udp_abort() racing with close(). Both racing functions acquire the socket lock, but udp{v6}_destroy_sock() release it before performing destructive actions.
We can't easily extend the socket lock scope to avoid the race, instead use the SOCK_DEAD flag to prevent udp_abort from doing any action when the critical race happens.
Diagnosed-and-tested-by: Kaustubh Pandey <[email protected]>
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
74- osv-coords65 versionspkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_57&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%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-default&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/kernel-livepatch-SLE15-SP3_Update_56&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP3pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP3pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP3pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/kernel-64kb&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-default&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-default-base&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-docs&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-preempt&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-source&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-syms&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-syms-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-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-rt_debug&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%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-docs&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2012%20SP5
< 1-8.3.1+ 64 more
- (no CPE)range: < 1-8.3.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.205.1
- (no CPE)range: < 1-150300.7.3.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 4.12.14-10.188.1
- (no CPE)range: < 4.12.14-10.188.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1.150300.18.120.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.205.1
- (no CPE)range: < 5.3.18-150300.205.1
- (no CPE)range: < 5.3.18-150300.205.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1.150300.18.120.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1.150300.18.120.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1.150300.18.120.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1.150300.18.120.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1.150300.18.120.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 5.3.18-150300.59.201.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 4.12.14-10.188.1
- (no CPE)range: < 4.12.14-10.188.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 4.12.14-122.219.1
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 8 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=4.9,<4.9.274
- 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:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.13:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.13:rc6:*:*:*:*:*:*
- (no CPE)range: 4.9
- (no CPE)
Patches
Vulnerability mechanics
References
7- git.kernel.org/stable/c/2f73448041bd0682d4b552cfd314ace66107f1adnvdPatch
- git.kernel.org/stable/c/5a88477c1c85e4baa51e91f2d40f2166235daa56nvdPatch
- git.kernel.org/stable/c/65310b0aff86980a011c7c7bfa487a333d4ca241nvdPatch
- git.kernel.org/stable/c/8729ec8a2238152a4afc212a331a6cd2c61aeeacnvdPatch
- git.kernel.org/stable/c/a0882f68f54f7a8b6308261acee9bd4faab5a69envdPatch
- git.kernel.org/stable/c/a8b897c7bcd47f4147d066e22cc01d1026d7640envdPatch
- git.kernel.org/stable/c/e3c36c773aed0fef8b1d3d555b43393ec564400fnvdPatch
News mentions
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