sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a \x00\x04\x00\x00\x00\x00\x00\x00\x00\x04 value to sprintf. NOTE: the issue does not affect glibc by default in 2016 or later (i.e., 2.23 or later) because of commits made in 2015 for inlining of C99 math functions through use of GCC built-ins. In other words, the reference to 2.23 is intentional despite the mention of "Fixed for glibc 2.33" in the 26649 reference.
総合評価: CVE-2020-29573 は中リスク(62.1/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 2.77%、84 パーセンタイル) 根拠: 直近 1 日で EPSS が +2.60% 上昇。悪用への関心が高まっている可能性があります。 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置(高いほど相対的に深刻)を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ(新 − 旧) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.16% | 2.77% | +2.60% |
| 2 | 2026-03-03 | 0.10% | 0.16% | +0.06% |
| 3 | 2025-11-21 | — | 0.10% | — |
EPSS の全履歴 (全 13 件)
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2020-29573 not yet assigned priority: Debian including 1 source packages (glibc), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2020-29573 |
gentoo
|
normal | CVE-2020-29573: 1 GLSA(s) (202101-20), 1 atom(s) (sys-libs/glibc); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2020-29573 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2020-29573 |
suse
|
high | CVE-2020-29573 severity important: SUSE including 504 source package names (0.1.0:glibc-2.26-13.56.1, 0.1.75:glibc-2.26-13.56.1, …), 945 product×package rows across 136 product lines (Container caasp/v4/389-ds, Container caasp/v4/busybox, … (136 product lines)): Fixed 799, Known Affected 130, Known Not Affected 16. | https://www.suse.com/security/cve/CVE-2020-29573/ |
ubuntu
|
low | CVE-2020-29573 low priority: Ubuntu including 2 source packages (eglibc, glibc), 32 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 15, not-affected 14, needs-triage 2, needed 1. | https://ubuntu.com/security/CVE-2020-29573 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| gnu | glibc | < 2.23 | cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:x86:* |
| redhat | enterprise_linux | 7.0 | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* |
| netapp | cloud_backup | — | cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* |
| netapp | solidfire_baseboard_management_controller | — | cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://security.gentoo.org/glsa/202101-20 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20210122-0004/ | Third Party Advisory |
| https://sourceware.org/bugzilla/show_bug.cgi?id=26649 | Issue Tracking Patch Third Party Advisory |
| https://sourceware.org/pipermail/libc-alpha/2020-September/117779.html | Patch Third Party Advisory |