CVE-2022-2881 | Buffer overread in statistics channel code

The underlying bug might cause read past end of the buffer and either read memory it should not read, or crash the process.

Published: 2022-09-21 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-2881 is rated Moderate Risk (43/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.03%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-2881

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.69% 1.03% +0.34%
2 2026-05-18 3.08% 0.69% -2.40%
3 2026-05-14 — 3.08% —

Full EPSS history (48 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-2881

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.2 4.2 [email protected]
8.2 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 4.2 [email protected]

Weakness enumeration for CVE-2022-2881

OS Trackers for CVE-2022-2881

vendor priority summary link
alpine — CVE-2022-2881: 1 source package rows (bind); 13 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 6. https://security.alpinelinux.org/vuln/CVE-2022-2881
debian not yet assigned CVE-2022-2881 not yet assigned priority: Debian including 1 source packages (bind9), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. https://security-tracker.debian.org/tracker/CVE-2022-2881
gentoo low CVE-2022-2881: 1 GLSA(s) (202210-25), 2 atom(s) (net-dns/bind, net-dns/bind-tools); latest impact low. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2022-2881
redhat medium — https://access.redhat.com/security/cve/CVE-2022-2881
suse medium CVE-2022-2881 severity moderate: SUSE including 43 source package names (bind, bind-9.18.7-1.1, …), 311 product×package rows across 39 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (39 product lines)): Known Not Affected 294, Fixed 17. https://www.suse.com/security/cve/CVE-2022-2881/
ubuntu medium CVE-2022-2881 medium priority: Ubuntu including 2 source packages (bind9, isc-dhcp), 16 status rows across 8 suites (bionic, focal, jammy, kinetic, lunar, trusty, upstream, xenial): not-affected 11, released 3, needs-triage 2. https://ubuntu.com/security/CVE-2022-2881

Affected software / configurations for CVE-2022-2881

Vendor Product Version Raw CPE
isc bind >= 9.18.0, < 9.18.7 cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*
isc bind >= 9.19.0, < 9.19.5 cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*

References for CVE-2022-2881

URL Tags
http://www.openwall.com/lists/oss-security/2022/09/21/3 Mailing List Patch Third Party Advisory
https://kb.isc.org/docs/cve-2022-2881 Patch Vendor Advisory
https://security.gentoo.org/glsa/202210-25 Third Party Advisory
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