Unrated severityNVD Advisory· Published May 21, 2024· Updated Dec 6, 2025
net: sched: fix memory leak in tcindex_partial_destroy_work
CVE-2021-47295
Description
In the Linux kernel, the following vulnerability has been resolved:
net: sched: fix memory leak in tcindex_partial_destroy_work
Syzbot reported memory leak in tcindex_set_parms(). The problem was in non-freed perfect hash in tcindex_partial_destroy_work().
In tcindex_set_parms() new tcindex_data is allocated and some fields from old one are copied to new one, but not the perfect hash. Since tcindex_partial_destroy_work() is the destroy function for old tcindex_data, we need to free perfect hash to avoid memory leak.
Affected products
24- 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_debug&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%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&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-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%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&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-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_59&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5
< 4.12.14-16.194.1+ 21 more
- (no CPE)range: < 4.12.14-16.194.1
- (no CPE)range: < 4.12.14-16.194.1
- (no CPE)range: < 4.12.14-122.225.1
- (no CPE)range: < 4.12.14-122.225.1
- (no CPE)range: < 4.12.14-122.225.1
- (no CPE)range: < 4.12.14-122.225.1
- (no CPE)range: < 4.12.14-122.225.1
- (no CPE)range: < 4.12.14-122.225.2
- (no CPE)range: < 4.12.14-122.225.1
- (no CPE)range: < 4.12.14-10.197.1
- (no CPE)range: < 4.12.14-10.197.1
- (no CPE)range: < 4.12.14-16.194.1
- (no CPE)range: < 4.12.14-16.194.1
- (no CPE)range: < 4.12.14-122.225.1
- (no CPE)range: < 4.12.14-122.225.1
- (no CPE)range: < 4.12.14-10.197.1
- (no CPE)range: < 4.12.14-16.194.1
- (no CPE)range: < 4.12.14-16.194.1
- (no CPE)range: < 4.12.14-122.225.1
- (no CPE)range: < 4.12.14-122.225.1
- (no CPE)range: < 4.12.14-10.197.1
- (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
11- git.kernel.org/stable/c/01d0d2b8b4e3cf2110baba9371c0c3d04ad5c77bmitre
- git.kernel.org/stable/c/18c3fa7a7fdbb4d21dafc8a7710ae2c1680930f6mitre
- git.kernel.org/stable/c/372ae77cf11d11fb118cbe2d37def9dd5f826abdmitre
- git.kernel.org/stable/c/3abebc503a5148072052c229c6b04b329a420ecdmitre
- git.kernel.org/stable/c/53af9c793f644d5841d84d8e0ad83bd7ab47f3e0mitre
- git.kernel.org/stable/c/7a6fb69bbcb21e9ce13bdf18c008c268874f0480mitre
- git.kernel.org/stable/c/7c183dc0af472dec33d2c0786a5e356baa8cad19mitre
- git.kernel.org/stable/c/8d7924ce85bae64e7a67c366c7c50840f49f3a62mitre
- git.kernel.org/stable/c/8e9662fde6d63c78eb1350f6167f64c9d71a865bmitre
- git.kernel.org/stable/c/cac71d27745f92ee13f0ecc668ffe151a4a9c9b1mitre
- git.kernel.org/stable/c/f5051bcece50140abd1a11a2d36dc3ec5484fc32mitre
News mentions
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