CVE-2021-3326: debian debian_linux Reachable Assertion
Vulnerability summary
CVE-2021-3326 is a high (CVSS 7.5) Reachable Assertion vulnerability in debian debian_linux. EPSS estimates a 3.82% chance of exploitation in the next 30 days, higher than 90.1% of scored vulnerabilities.
Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 4% (FIRST, 04-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 11 · Related 8Timeline
- 27-01-2021PublishedVulnerability first disclosed.
- 14-10-2026Last modifiedVulnerability information updated.
Description
The iconv function in the GNU C Library (aka glibc or libc6) 2.32 and earlier, when processing invalid input sequences in the ISO-2022-JP-3 encoding, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
3.82%
Chance of exploitation in the next 30 days
Percentile
90%
Versus all other CVEs
30-day change
Increase +0.73 pp
From 3.09% on 05-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Fujitsu6 products
- m10-1_firmware< xcp2410 | < xcp3110
- m10-4_firmware< xcp2410 | < xcp3110
- m10-4s_firmware< xcp2410 | < xcp3110
- m12-1_firmware< xcp2410 | < xcp3110
- m12-2_firmware< xcp2410 | < xcp3110
Debian2 products
- glibc< 2.31-10
- debian_linuxEOL10.0
Netapp2 products
- e-series_santricity_os_controller≥ 11.0, ≤ 11.60.3
- ontap_select_deploy_administration_utilityna
Ubuntu2 products
- eglibcAll versions (No fix recorded)
- glibc< 2.23-0ubuntu11.3+esm2 | < 2.27-3ubuntu1.5 | < 2.31-0ubuntu9.7
Gnu1 product
- glibc≤ 2.32.0
Oracle1 product
6 vendors · 14 products
References
18 links- security.netapp.com/advisory/ntap-20210304-0007/Third Party Advisory
- www.oracle.com/security-alerts/cpuapr2022.htmlNot Applicable
