CVE-2021-42739: debian debian_linux Out-of-bounds Write

Modified

AliasesSUSE-SU-2022:0242-1UBUNTU-CVE-2021-42739DEBIAN-CVE-2021-42739

Published 20-10-2021Last modified 04-08-2024

Vulnerability summary

CVE-2021-42739 is a medium (CVSS 6.7) Out-of-bounds Write vulnerability in debian debian_linux. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 40.9% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 6.7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

6.7/10

010

Medium · v3.1 (NVD)

EPSS score

0.47%

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

Advisory lineage

Upstream 0 · Downstream 55 · Duplicates 1 · Related 46

DLA-2843-1 DLA-2941-1 DSA-5096-1 MGASA-2021-0507 MGASA-2021-0508 OPENSUSE-SU-2021:1477-1+50 more

Timeline

20-10-2021
PublishedVulnerability first disclosed.
04-08-2024
Last modifiedVulnerability information updated.

Description

The firewire subsystem in the Linux kernel through 5.14.13 has a buffer overflow related to drivers/media/firewire/firedtv-avc.c and drivers/media/firewire/firedtv-ci.c, because avc_ca_pmt mishandles bounds checking.

CVSS metrics

4 scores · 3 sources · 2 versions

v3.16.7v2.04.6

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.47% 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-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.

Affected systems

Version check

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

Ubuntu68 products

linuxAll versions (No fix recorded) | < 4.4.0-223.256 | < 4.15.0-167.175 | < 5.4.0-97.110
linux-aws< 4.4.0-1103.108 | < 4.4.0-1139.153 | < 4.15.0-1119.127 | < 5.4.0-1064.67
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11< 5.11.0-1028.31~20.04.1
linux-aws-5.13< 5.13.0-1012.13~20.04.1

linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1064.67~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-fips< 4.15.0-2060.62 | All versions (No fix recorded) | < 5.4.0-1069.73+fips2
linux-aws-hwe< 4.15.0-1119.126~16.04.2
linux-azure< 4.15.0-1130.143~14.04.1 | < 4.15.0-1130.143~16.04.1 | All versions (No fix recorded) | < 5.4.0-1068.71
linux-azure-4.15< 4.15.0-1131.144
linux-azure-5.11< 5.11.0-1028.31~20.04.2
linux-azure-5.13< 5.13.0-1013.15~20.04.1
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1068.71~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fips< 4.15.0-2042.46 | All versions (No fix recorded) | < 5.4.0-1073.76+fips1
linux-bluefield< 5.4.0-1026.29
linux-dell300x< 4.15.0-1034.39
linux-fips< 4.4.0-1073.79 | All versions (No fix recorded) | < 4.15.0-1076.85 | < 5.4.0-1041.47
linux-gcp< 4.15.0-1115.129~16.04.1 | All versions (No fix recorded) | < 5.4.0-1063.67
linux-gcp-4.15< 4.15.0-1115.129
linux-gcp-5.11< 5.11.0-1029.33~20.04.3
linux-gcp-5.13< 5.13.0-1013.16~20.04.1
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1063.67~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-fips< 4.15.0-2025.27 | All versions (No fix recorded) | < 5.4.0-1067.71~20.04.1
linux-gke< 5.4.0-1061.64
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.4< 5.4.0-1061.64~18.04.1
linux-gkeop< 5.4.0-1032.33
linux-gkeop-5.4< 5.4.0-1032.33~18.04.1
linux-hwe< 4.15.0-167.175~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13< 5.13.0-28.31~20.04.1
linux-hwe-5.4< 5.4.0-97.110~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1013.14
linux-ibm-5.4< 5.4.0-1014.15~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtimeAll versions (No fix recorded)
linux-kvm< 4.4.0-1104.113 | < 4.15.0-1106.108 | < 5.4.0-1054.56
linux-lts-xenial< 4.4.0-223.256~14.04.1
linux-oemAll versions (No fix recorded)
linux-oem-5.10< 5.10.0-1053.55
linux-oem-5.13< 5.13.0-1029.36
linux-oem-5.14< 5.14.0-1008.8
linux-oem-5.6All versions (No fix recorded)
linux-oracle< 4.15.0-1086.94~16.04.1 | < 4.15.0-1086.94 | < 5.4.0-1062.66
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11< 5.11.0-1028.31~20.04.1
linux-oracle-5.13< 5.13.0-1016.20~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1062.66~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1052.58
linux-raspi-5.4< 5.4.0-1052.58~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2< 4.15.0-1102.109 | All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded)
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-snapdragon< 4.15.0-1119.128

Show all 68

Oracle3 products

Debian2 products

linux< 5.14.16-1
debian_linuxEOL9.0

Starwindsoftware2 products

starwind_san_\&_nasv8r12
starwind_virtual_sanv8r13:14338

Fedoraproject1 product

fedoraEOL33 | 34 | 35

Linux1 product

linux_kernel≤ 5.14.13

Suse1 product

kgraft-patch-SLE12-SP5_Update_24&distro=SUSE Linux Enterprise Live Patching 12 SP5< 4-2.2

7 vendors · 78 products

References

22 links

lore.kernel.org/linux-media/YHaulytonFcW+lyZ%40mwanda/
git.kernel.org/pub/…REPORT
seclists.org/oss-sec/2021/q2/46REPORT
bugzilla.redhat.com/show_bug.cgi?id=1951739Issue TrackingMitigationThird Party Advisory
www.oracle.com/security-alerts/cpujul2022.htmlPatchThird Party Advisory
www.starwindsoftware.com/security/sw-20220804-0001/Third Party Advisory
www.suse.com/support/update/announcement/2022/suse-su-20220242-1/Advisory
bugzilla.suse.com/1192036REPORT
www.suse.com/security/cve/CVE-2021-42739WEB
ubuntu.com/security/CVE-2021-42739REPORT

Show all 22 references

lore.kernel.org/linux-media/YHaulytonFcW+lyZ@mwanda/REPORT
ubuntu.com/security/notices/USN-5165-1Advisory
ubuntu.com/security/notices/USN-5207-1Advisory
ubuntu.com/security/notices/USN-5265-1Advisory
ubuntu.com/security/notices/USN-5266-1Advisory
ubuntu.com/security/notices/USN-5267-1Advisory
ubuntu.com/security/notices/USN-5268-1Advisory
ubuntu.com/security/notices/USN-5267-3Advisory
ubuntu.com/security/notices/USN-5361-1Advisory
www.cve.org/CVERecord?id=CVE-2021-42739REPORT
security-tracker.debian.org/tracker/CVE-2021-42739Advisory
nvd.nist.gov/vuln/detail/CVE-2021-42739OvalAdvisory