CVE-2020-36385: linux linux_kernel Use After Free

Modified

AliasesRHSA-2021:4597RHSA-2021:4770RHSA-2021:4773+8 more

Published 07-06-2021Last modified 04-08-2024

Vulnerability summary

CVE-2020-36385 is a high (CVSS 7.8) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 1.48% chance of exploitation in the next 30 days, higher than 73.8% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

7.8/10

010

High · v3.1 (NVD)

EPSS score

1.48%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Timeline

07-06-2021
PublishedVulnerability first disclosed.
04-08-2024
Last modifiedVulnerability information updated.

Description

An issue was discovered in the Linux kernel before 5.10. drivers/infiniband/core/ucma.c has a use-after-free because the ctx is reached via the ctx_list in some ucma_migrate_id situations where ucma_close is called, aka CID-f5449e74802c.

CVSS metrics

5 scores · 4 sources · 2 versions

v3.17.8v2.06.8

EPSS trend

Probability

1.48%

Chance of exploitation in the next 30 days

Percentile

74%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.48% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected systems

Version check

Known conditions: local access, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Redhat137 products

bpftool< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-1160.49.1.el7
bpftool-debuginfo< 0:3.10.0-1160.49.1.el7
kernel< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-327.102.1.el7 | < 0:3.10.0-1160.49.1.el7
kernel-abi-whitelists< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-327.102.1.el7 | < 0:3.10.0-1160.49.1.el7
kernel-bootwrapper< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-1160.49.1.el7

kernel-debug< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-327.102.1.el7 | < 0:3.10.0-1160.49.1.el7
kernel-debug-debuginfo< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-327.102.1.el7 | < 0:3.10.0-1160.49.1.el7
kernel-debug-devel< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-327.102.1.el7 | < 0:3.10.0-1160.49.1.el7
kernel-debuginfo< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-327.102.1.el7 | < 0:3.10.0-1160.49.1.el7
kernel-debuginfo-common-ppc64< 0:3.10.0-1160.49.1.el7
kernel-debuginfo-common-ppc64le< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-1160.49.1.el7
kernel-debuginfo-common-s390x< 0:3.10.0-1160.49.1.el7
kernel-debuginfo-common-x86_64< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-327.102.1.el7 | < 0:3.10.0-1160.49.1.el7
kernel-devel< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-327.102.1.el7 | < 0:3.10.0-1160.49.1.el7
kernel-doc< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-327.102.1.el7 | < 0:3.10.0-1160.49.1.el7
kernel-kdump< 0:3.10.0-1160.49.1.el7
kernel-kdump-debuginfo< 0:3.10.0-1160.49.1.el7
kernel-kdump-devel< 0:3.10.0-1160.49.1.el7
kernel-rt< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-debug< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-debug-debuginfo< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-debug-devel< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-debug-kvm< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-debug-kvm-debuginfo< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-debuginfo< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-debuginfo-common-x86_64< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-devel< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-doc< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-kvm< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-kvm-debuginfo< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-trace< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-trace-debuginfo< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-trace-devel< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-trace-kvm< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-rt-trace-kvm-debuginfo< 0:3.10.0-1160.49.1.rt56.1189.el7
kernel-tools< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-327.102.1.el7 | < 0:3.10.0-1160.49.1.el7
kernel-tools-debuginfo< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-327.102.1.el7 | < 0:3.10.0-1160.49.1.el7
kernel-tools-libs< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-327.102.1.el7 | < 0:3.10.0-1160.49.1.el7
kernel-tools-libs-devel< 0:3.10.0-957.86.1.el7 | < 0:3.10.0-327.102.1.el7 | < 0:3.10.0-1160.49.1.el7
kpatch-patch-3_10_0-1062_43_1< 0:1-7.el7
kpatch-patch-3_10_0-1062_43_1-debuginfo< 0:1-7.el7
kpatch-patch-3_10_0-1062_45_1< 0:1-7.el7
kpatch-patch-3_10_0-1062_45_1-debuginfo< 0:1-7.el7
kpatch-patch-3_10_0-1062_46_1< 0:1-6.el7
kpatch-patch-3_10_0-1062_46_1-debuginfo< 0:1-6.el7
kpatch-patch-3_10_0-1062_49_1< 0:1-4.el7
kpatch-patch-3_10_0-1062_49_1-debuginfo< 0:1-4.el7
kpatch-patch-3_10_0-1062_51_1< 0:1-4.el7
kpatch-patch-3_10_0-1062_51_1-debuginfo< 0:1-4.el7
kpatch-patch-3_10_0-1062_52_2< 0:1-3.el7
kpatch-patch-3_10_0-1062_52_2-debuginfo< 0:1-3.el7
kpatch-patch-3_10_0-1062_56_1< 0:1-2.el7
kpatch-patch-3_10_0-1062_56_1-debuginfo< 0:1-2.el7
kpatch-patch-3_10_0-1160_11_1< 0:1-10.el7
kpatch-patch-3_10_0-1160_11_1-debuginfo< 0:1-10.el7
kpatch-patch-3_10_0-1160_15_2< 0:1-10.el7
kpatch-patch-3_10_0-1160_15_2-debuginfo< 0:1-10.el7
kpatch-patch-3_10_0-1160_21_1< 0:1-8.el7
kpatch-patch-3_10_0-1160_21_1-debuginfo< 0:1-8.el7
kpatch-patch-3_10_0-1160_24_1< 0:1-6.el7
kpatch-patch-3_10_0-1160_24_1-debuginfo< 0:1-6.el7
kpatch-patch-3_10_0-1160_25_1< 0:1-6.el7
kpatch-patch-3_10_0-1160_25_1-debuginfo< 0:1-6.el7
kpatch-patch-3_10_0-1160_31_1< 0:1-5.el7
kpatch-patch-3_10_0-1160_31_1-debuginfo< 0:1-5.el7
kpatch-patch-3_10_0-1160_36_2< 0:1-4.el7
kpatch-patch-3_10_0-1160_36_2-debuginfo< 0:1-4.el7
kpatch-patch-3_10_0-1160_41_1< 0:1-3.el7
kpatch-patch-3_10_0-1160_41_1-debuginfo< 0:1-3.el7
kpatch-patch-3_10_0-1160_42_2< 0:1-2.el7
kpatch-patch-3_10_0-1160_42_2-debuginfo< 0:1-2.el7
kpatch-patch-3_10_0-1160_45_1< 0:1-1.el7
kpatch-patch-3_10_0-1160_45_1-debuginfo< 0:1-1.el7
kpatch-patch-3_10_0-957_65_1< 0:1-7.el7
kpatch-patch-3_10_0-957_65_1-debuginfo< 0:1-7.el7
kpatch-patch-3_10_0-957_66_1< 0:1-7.el7
kpatch-patch-3_10_0-957_66_1-debuginfo< 0:1-7.el7
kpatch-patch-3_10_0-957_70_1< 0:1-6.el7
kpatch-patch-3_10_0-957_70_1-debuginfo< 0:1-6.el7
kpatch-patch-3_10_0-957_72_1< 0:1-4.el7
kpatch-patch-3_10_0-957_72_1-debuginfo< 0:1-4.el7
kpatch-patch-3_10_0-957_76_1< 0:1-4.el7
kpatch-patch-3_10_0-957_76_1-debuginfo< 0:1-4.el7
kpatch-patch-3_10_0-957_78_2< 0:1-3.el7
kpatch-patch-3_10_0-957_78_2-debuginfo< 0:1-3.el7
kpatch-patch-3_10_0-957_80_1< 0:1-2.el7
kpatch-patch-3_10_0-957_80_1-debuginfo< 0:1-2.el7
kpatch-patch-3_10_0-957_84_1< 0:1-1.el7
kpatch-patch-3_10_0-957_84_1-debuginfo< 0:1-1.el7
kpatch-patch-4_18_0-147_34_1< 0:1-12.el8_1
kpatch-patch-4_18_0-147_34_1-debuginfo< 0:1-12.el8_1
kpatch-patch-4_18_0-147_34_1-debugsource< 0:1-12.el8_1
kpatch-patch-4_18_0-147_38_1< 0:1-11.el8_1
kpatch-patch-4_18_0-147_38_1-debuginfo< 0:1-11.el8_1
kpatch-patch-4_18_0-147_38_1-debugsource< 0:1-11.el8_1
kpatch-patch-4_18_0-147_43_1< 0:1-9.el8_1
kpatch-patch-4_18_0-147_43_1-debuginfo< 0:1-9.el8_1
kpatch-patch-4_18_0-147_43_1-debugsource< 0:1-9.el8_1
kpatch-patch-4_18_0-147_44_1< 0:1-8.el8_1
kpatch-patch-4_18_0-147_44_1-debuginfo< 0:1-8.el8_1
kpatch-patch-4_18_0-147_44_1-debugsource< 0:1-8.el8_1
kpatch-patch-4_18_0-147_48_1< 0:1-5.el8_1
kpatch-patch-4_18_0-147_48_1-debuginfo< 0:1-5.el8_1
kpatch-patch-4_18_0-147_48_1-debugsource< 0:1-5.el8_1
kpatch-patch-4_18_0-147_51_1< 0:1-4.el8_1
kpatch-patch-4_18_0-147_51_1-debuginfo< 0:1-4.el8_1
kpatch-patch-4_18_0-147_51_1-debugsource< 0:1-4.el8_1
kpatch-patch-4_18_0-147_51_2< 0:1-3.el8_1
kpatch-patch-4_18_0-147_51_2-debuginfo< 0:1-3.el8_1
kpatch-patch-4_18_0-147_51_2-debugsource< 0:1-3.el8_1
kpatch-patch-4_18_0-147_52_1< 0:1-2.el8_1
kpatch-patch-4_18_0-147_52_1-debuginfo< 0:1-2.el8_1
kpatch-patch-4_18_0-147_52_1-debugsource< 0:1-2.el8_1
kpatch-patch-4_18_0-147_54_2< 0:1-1.el8_1
kpatch-patch-4_18_0-147_54_2-debuginfo< 0:1-1.el8_1
kpatch-patch-4_18_0-147_54_2-debugsource< 0:1-1.el8_1
kpatch-patch-4_18_0-147_56_1< 0:1-1.el8_1
kpatch-patch-4_18_0-147_56_1-debuginfo< 0:1-1.el8_1
kpatch-patch-4_18_0-147_56_1-debugsource< 0:1-1.el8_1
kpatch-patch-4_18_0-193_37_1< 0:1-11.el8_2
kpatch-patch-4_18_0-193_37_1-debuginfo< 0:1-11.el8_2
kpatch-patch-4_18_0-193_37_1-debugsource< 0:1-11.el8_2
kpatch-patch-4_18_0-193_40_1< 0:1-11.el8_2
kpatch-patch-4_18_0-193_40_1-debuginfo< 0:1-11.el8_2
kpatch-patch-4_18_0-193_40_1-debugsource< 0:1-11.el8_2
kpatch-patch-4_18_0-193_41_1< 0:1-11.el8_2
kpatch-patch-4_18_0-193_41_1-debuginfo< 0:1-11.el8_2
kpatch-patch-4_18_0-193_41_1-debugsource< 0:1-11.el8_2
kpatch-patch-4_18_0-193_46_1< 0:1-8.el8_2
kpatch-patch-4_18_0-193_46_1-debuginfo< 0:1-8.el8_2
kpatch-patch-4_18_0-193_46_1-debugsource< 0:1-8.el8_2
kpatch-patch-4_18_0-193_47_1< 0:1-8.el8_2
kpatch-patch-4_18_0-193_47_1-debuginfo< 0:1-8.el8_2
kpatch-patch-4_18_0-193_47_1-debugsource< 0:1-8.el8_2
kpatch-patch-4_18_0-193_51_1< 0:1-5.el8_2
kpatch-patch-4_18_0-193_51_1-debuginfo< 0:1-5.el8_2
kpatch-patch-4_18_0-193_51_1-debugsource< 0:1-5.el8_2

Show all 137

Ubuntu53 products

linuxAll versions (No fix recorded) | < 4.4.0-222.255 | < 4.15.0-162.170 | < 5.4.0-90.101
linux-aws< 4.4.0-1102.107 | < 4.4.0-1138.152 | < 4.15.0-1115.122 | < 5.4.0-1059.62
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1059.62~18.04.1

linux-aws-5.8All versions (No fix recorded)
linux-aws-fips< 4.15.0-2056.58 | All versions (No fix recorded) | < 5.4.0-1069.73+fips2
linux-aws-hwe< 4.15.0-1115.122~16.04.1
linux-azure< 4.15.0-1126.139~14.04.1 | < 4.15.0-1126.139~16.04.1 | All versions (No fix recorded) | < 5.4.0-1063.66
linux-azure-4.15< 4.15.0-1126.139
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1063.66~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fips< 4.15.0-2038.42 | All versions (No fix recorded) | < 5.4.0-1073.76+fips1
linux-bluefield< 5.4.0-1021.24
linux-dell300x< 4.15.0-1030.35
linux-fips< 4.4.0-1072.78 | All versions (No fix recorded) | < 4.15.0-1072.81 | < 5.4.0-1036.42
linux-gcp< 4.15.0-1111.125~16.04.1 | All versions (No fix recorded) | < 5.4.0-1057.61
linux-gcp-4.15< 4.15.0-1111.125
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1057.61~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-edgeAll versions (No fix recorded)
linux-gcp-fips< 4.15.0-2021.23 | All versions (No fix recorded) | < 5.4.0-1067.71~20.04.1
linux-gke< 5.4.0-1055.58
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.4< 5.4.0-1055.58~18.04.1
linux-gkeop< 5.4.0-1026.27
linux-gkeop-5.4< 5.4.0-1026.27~18.04.1
linux-hwe< 4.15.0-162.170~16.04.1 | All versions (No fix recorded)
linux-hwe-5.4< 5.4.0-90.101~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1007.8
linux-intel-iot-realtimeAll versions (No fix recorded)
linux-kvm< 4.4.0-1103.112 | < 4.15.0-1102.104 | < 5.4.0-1049.51
linux-lts-xenial< 4.4.0-222.255~14.04.1
linux-oemAll versions (No fix recorded)
linux-oem-5.6All versions (No fix recorded)
linux-oracle< 4.15.0-1083.91~16.04.1 | < 4.15.0-1083.91 | < 5.4.0-1057.61
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1057.61~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1046.50
linux-raspi-5.4< 5.4.0-1046.50~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2< 4.15.0-1098.104 | All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded)
linux-riscvAll versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-snapdragon< 4.15.0-1115.124

Show all 53

Netapp8 products

Show all 8

Debian1 product

linux< 5.10.4-1

Linux1 product

linux_kernel< 5.10

5 vendors · 200 products · Showing 200 of 221

References

37 links

syzkaller.appspot.com/bug?id=457491c4672d7b52c1007db213d93e47c711fae6REPORTPatchThird Party Advisory
sites.google.com/view/syzscope/kasan-use-after-free-read-in-ucma_close-2REPORTPatchThird Party Advisory
git.kernel.org/pub/…REPORTPatchVendor Advisory
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10REPORTRelease NotesVendor Advisory
security.netapp.com/advisory/ntap-20210720-0004/Third Party Advisory
www.starwindsoftware.com/security/sw-20220802-0002/Third Party Advisory
access.redhat.com/errata/RHSA-2021:4597Advisory
access.redhat.com/security/updates/classification/ARTICLE
bugzilla.redhat.com/show_bug.cgi?id=1974319REPORT
security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_4597.jsonAdvisory

Show all 37 references