CVE-2021-3826: fedoraproject fedora
CVSS: 6.5v3.1MediumModified
AliasesRHSA-2023:6372UBUNTU-CVE-2021-3826DEBIAN-CVE-2021-3826
Published 01-09-2022Last modified 14-10-2026
Vulnerability summary
CVE-2021-3826 is a medium (CVSS 6.5) vulnerability in fedoraproject fedora. EPSS estimates a 1.41% chance of exploitation in the next 30 days, higher than 72.1% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
1.41%
0%100%
Low · +0.03 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 5 · Related 3Timeline
- 01-09-2022PublishedVulnerability first disclosed.
- 14-10-2026Last modifiedVulnerability information updated.
Description
Heap/stack buffer overflow in the dlang_lname function in d-demangle.c in libiberty allows attackers to potentially cause a denial of service (segmentation fault and crash) via a crafted mangled symbol.
CVSS metrics
4 scores · 4 sources · 1 versionMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · Red hatEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.41%
Chance of exploitation in the next 30 days
Percentile
72%
Versus all other CVEs
30-day change
+0.03 pp
From 1.38% on 18-09-2026
18-09-202618-10-2026
EPSS score1.41%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Redhat7 products
- gdb< 0:10.2-11.el9
- gdb-debuginfo< 0:10.2-11.el9
- gdb-debugsource< 0:10.2-11.el9
- gdb-doc< 0:10.2-11.el9
- gdb-gdbserver< 0:10.2-11.el9
Ubuntu3 products
- gcc-11All versions (No fix recorded)
- gdbAll versions (No fix recorded)
- libibertyAll versions (No fix recorded)
Debian2 products
- binutils< 2.37.50.20220121-1
- libiberty< 20220713-1
Fedoraproject1 product
- fedoraEOL35 | 36 | 37
Gnu1 product
- gcc11.2
5 vendors · 14 products
