Unrated severityNVD Advisory· Published May 7, 2025· Updated May 7, 2025
net_sched: keep alloc_hash updated after hash allocation
CVE-2020-36791
Description
In the Linux kernel, the following vulnerability has been resolved:
net_sched: keep alloc_hash updated after hash allocation
In commit 599be01ee567 ("net_sched: fix an OOB access in cls_tcindex") I moved cp->hash calculation before the first tcindex_alloc_perfect_hash(), but cp->alloc_hash is left untouched. This difference could lead to another out of bound access.
cp->alloc_hash should always be the size allocated, we should update it after this tcindex_alloc_perfect_hash().
Affected products
53- osv-coords51 versionspkg:rpm/suse/kernel-64kb&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-64kb&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%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-default&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP3pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP3pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/kernel-default&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&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/kernel-docs&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-livepatch-SLE15-SP3_Update_58&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP3pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-preempt&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/kernel-source&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/kernel-syms&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_69&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5
< 5.3.18-150300.59.207.1+ 50 more
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1.150300.18.124.1
- (no CPE)range: < 5.3.18-150300.59.207.1.150300.18.124.1
- (no CPE)range: < 5.3.18-150300.59.207.1.150300.18.124.1
- (no CPE)range: < 5.3.18-150300.59.207.1.150300.18.124.1
- (no CPE)range: < 5.3.18-150300.59.207.1.150300.18.124.1
- (no CPE)range: < 5.3.18-150300.59.207.1.150300.18.124.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 4.12.14-122.261.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 4.12.14-122.261.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 4.12.14-122.261.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 1-150300.7.3.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.211.1
- (no CPE)range: < 5.3.18-150300.211.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 4.12.14-122.261.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 4.12.14-122.261.1
- (no CPE)range: < 5.3.18-150300.211.1
- (no CPE)range: < 5.3.18-150300.211.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 4.12.14-122.261.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 4.12.14-122.261.1
- (no CPE)range: < 5.3.18-150300.59.207.1
- (no CPE)range: < 1-8.3.1
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
9- blog.cdthoughts.ch/2021/03/16/syzbot-bug.htmlmitre
- git.kernel.org/stable/c/0d1c3530e1bd38382edef72591b78e877e0edcd3mitre
- git.kernel.org/stable/c/557d015ffb27b672e24e6ad141fd887783871dc2mitre
- git.kernel.org/stable/c/9f8b6c44be178c2498a00b270872a6e30e7c8266mitre
- git.kernel.org/stable/c/bd3ee8fb6371b45c71c9345cc359b94da2ddefa9mitre
- git.kernel.org/stable/c/c4453d2833671e3a9f6bd52f0f581056c3736386mitre
- git.kernel.org/stable/c/d23faf32e577922b6da20bf3740625c1105381bfmitre
- git.kernel.org/stable/c/d6cdc5bb19b595486fb2e6661e5138d73a57f454mitre
- syzkaller.appspot.com/bugmitre
News mentions
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