CVE & CISA-KEV CatalogNVD
CVE-2021-47353
MEDIUM5.5
CVSS v3
Description
In the Linux kernel, the following vulnerability has been resolved: udf: Fix NULL pointer dereference in udf_symlink function In function udf_symlink, epos.bh is assigned with the value returned by udf_tgetblk. The function udf_tgetblk is defined in udf/misc.c and returns the value of sb_getblk function that could be NULL. Then, epos.bh is used without any check, causing a possible NULL pointer dereference when sb_getblk fails. This fix adds a check to validate the value of epos.bh.
How to fix
Remediation Available
linuxDebian
Fixed in:5.10.70-1CVE-2021-47353
Fixed in:5.14.6-1CVE-2021-47353
Fixed in:5.14.6-1CVE-2021-47353
Fixed in:5.14.6-1CVE-2021-47353
bpftoolRocky
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
bpftoolRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
bpftool-debuginfoRocky
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
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bpftool-debuginfoRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
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Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernelRocky
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernelRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
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kernel-abi-stablelistsRocky
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kernel-abi-stablelistsRed Hat / RHEL
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kernel-coreRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
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kernel-coreRocky
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kernel-cross-headersRed Hat / RHEL
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kernel-cross-headersRocky
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kernel-debugRed Hat / RHEL
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kernel-debugRocky
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kernel-debug-coreRocky
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kernel-debug-coreRed Hat / RHEL
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kernel-debug-debuginfoRed Hat / RHEL
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kernel-debug-debuginfoRocky
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kernel-debug-develRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
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kernel-debug-develRocky
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kernel-debug-modulesRocky
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
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kernel-debug-modulesRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
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kernel-debug-modules-extraRocky
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kernel-debug-modules-extraRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
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Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-debuginfoRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
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kernel-debuginfoRocky
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kernel-debuginfo-common-aarch64Rocky
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kernel-debuginfo-common-aarch64Red Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-debuginfo-common-ppc64leRocky
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kernel-debuginfo-common-ppc64leRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-debuginfo-common-s390xRocky
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kernel-debuginfo-common-s390xRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-debuginfo-common-x86_64Rocky
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kernel-debuginfo-common-x86_64Red Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-develRocky
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kernel-develRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
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kernel-docRocky
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kernel-docRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-headersRocky
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
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kernel-headersRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
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kernel-modulesRocky
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kernel-modulesRed Hat / RHEL
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Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
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kernel-modules-extraRocky
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kernel-modules-extraRed Hat / RHEL
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kernel-rtRocky
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rtRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-coreRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-coreRocky
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debugRocky
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debugRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debug-coreRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debug-coreRocky
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debug-debuginfoRocky
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debug-debuginfoRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debug-develRocky
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debug-develRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debug-kvmRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debug-kvmRocky
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debug-modulesRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debug-modulesRocky
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debug-modules-extraRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debug-modules-extraRocky
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kernel-rt-debuginfoRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debuginfoRocky
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-debuginfo-common-x86_64Rocky
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kernel-rt-debuginfo-common-x86_64Red Hat / RHEL
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-develRocky
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kernel-rt-develRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-kvmRocky
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-kvmRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-modulesRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-modulesRocky
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-modules-extraRocky
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-rt-modules-extraRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.rt7.349.el8_10RHSA-2024:4352
kernel-toolsRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
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kernel-toolsRocky
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kernel-tools-debuginfoRed Hat / RHEL
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kernel-tools-debuginfoRocky
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kernel-tools-libsRed Hat / RHEL
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kernel-tools-libsRocky
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kernel-tools-libs-develRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
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kernel-tools-libs-develRocky
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kernel-zfcpdumpRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-zfcpdumpRocky
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-zfcpdump-coreRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-zfcpdump-coreRocky
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-zfcpdump-debuginfoRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-zfcpdump-debuginfoRocky
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-zfcpdump-develRocky
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-zfcpdump-develRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-zfcpdump-modulesRocky
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-zfcpdump-modulesRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-zfcpdump-modules-extraRocky
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
kernel-zfcpdump-modules-extraRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
perfRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
perfRocky
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
perf-debuginfoRocky
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
perf-debuginfoRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
python3-perfRocky
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
python3-perfRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
python3-perf-debuginfoRed Hat / RHEL
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
python3-perf-debuginfoRocky
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
Fixed in:0:4.18.0-553.8.1.el8_10RHSA-2024:4211
linuxUbuntu
Fixed in:4.4.0-269.303USN-7554-1
linux-awsUbuntu
Fixed in:4.4.0-1144.150USN-7554-2
Fixed in:4.4.0-1182.197USN-7554-1
linux-fipsUbuntu
Fixed in:4.4.0-1114.121USN-7554-3
linux-image-4.4.0-1114-fipsUbuntu
Fixed in:4.4.0-1114.121USN-7554-3
linux-image-4.4.0-1144-awsUbuntu
Fixed in:4.4.0-1144.150USN-7554-2
linux-image-4.4.0-1145-kvmUbuntu
Fixed in:4.4.0-1145.156USN-7554-1
linux-image-4.4.0-1182-awsUbuntu
Fixed in:4.4.0-1182.197USN-7554-1
linux-image-4.4.0-269-genericUbuntu
Fixed in:4.4.0-269.303~14.04.1USN-7554-2
Fixed in:4.4.0-269.303USN-7554-1
linux-image-4.4.0-269-lowlatencyUbuntu
Fixed in:4.4.0-269.303~14.04.1USN-7554-2
Fixed in:4.4.0-269.303USN-7554-1
linux-image-awsUbuntu
Fixed in:4.4.0.1144.141USN-7554-2
Fixed in:4.4.0.1182.186USN-7554-1
linux-image-fipsUbuntu
Fixed in:4.4.0.1114.115USN-7554-3
linux-image-genericUbuntu
Fixed in:4.4.0.269.275USN-7554-1
linux-image-generic-lts-xenialUbuntu
Fixed in:4.4.0.269.275USN-7554-1
linux-image-kvmUbuntu
Fixed in:4.4.0.1145.142USN-7554-1
linux-image-lowlatencyUbuntu
Fixed in:4.4.0.269.275USN-7554-1
linux-image-lowlatency-lts-xenialUbuntu
Fixed in:4.4.0.269.275USN-7554-1
linux-image-virtualUbuntu
Fixed in:4.4.0.269.275USN-7554-1
linux-image-virtual-lts-xenialUbuntu
Fixed in:4.4.0.269.275USN-7554-1
linux-kvmUbuntu
Fixed in:4.4.0-1145.156USN-7554-1
linux-lts-xenialUbuntu
Fixed in:4.4.0-269.303~14.04.1USN-7554-2
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Exploit Intelligence
0.31%probability of exploitation in 30 days
23rdpercentile
Low risk: more likely to be exploited than 23% of all known CVEs.
References
Related Vulnerabilities
Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2023-21758 | High | 7.5 | 92% | - | Fix |
| CVE-2023-21547 | High | 7.5 | 88% | - | Fix |
| CVE-2014-3470 | Medium | 4.3 | 86% | - | Fix |
| CVE-2021-44224 | High | 8.2 | 82% | - | Fix |
| CVE-2016-0742 | High | 7.5 | 82% | - | Fix |
| CVE-2009-1386 | Medium | 5.0 | 80% | - | Fix |
Embed a live status badge for CVE-2021-47353
Markdown
[](https://tridentstack.com/cve/CVE-2021-47353)HTML
<a href="https://tridentstack.com/cve/CVE-2021-47353"><img src="https://tridentstack.com/cve/badge/CVE-2021-47353.svg" alt="CVE-2021-47353"></a>Find and fix vulnerabilities across your fleet
TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.
Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-12-24.