CVE-2026-102474— Dash: dash: heap out-of-bounds write in conv_escape via undersized unicode escape reservation
Quick assessment
Affected
Red Hat Red Hat Enterprise Linux 6
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
dash 中发现了一个漏洞。printf 内建命令在转换 Unicode \u 或 \U 转义序列之前，仅预留了 4 字节空间，但多字节字符可能需要 5 字节或 6 字节。本地用户若能向 dash 的 printf 或 echo %b 提供此类转义序列（包括通过 dash -c 及位置参数方式），即可导致写入操作超出预留空间 1 或 2 字节。
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-102474
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Dash: dash: heap out-of-bounds write in conv_escape via undersized unicode escape reservation
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in dash. The printf builtin reserves four bytes before converting a Unicode \u or \U escape, but the multi-byte token can need five or six bytes. A local user who can supply such an escape to dash printf or echo %b, including through dash -c and a positional argument, can write one or two bytes past that reservation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 6 | - |
cpe:/o:redhat:enterprise_linux:6
|
|
II. Public POCs for CVE-2026-102474
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-102474
请登录查看更多情报信息。
Vendor Advisories for CVE-2026-102474 (2)
Same Patch Batch · Red Hat · 2026-09-29 · 5 CVEs total
| CVE-2026-95520 | 7.1 HIGH | Rpm: rpm: integer overflow in iterreadarchivenext() leads to heap-based buffer overflow wh |
| CVE-2026-97024 | 7.1 HIGH | Flatpak: flatpak: arbitrary write in root context via path traversal in deploy directory f |
| CVE-2026-97029 | 5.7 MEDIUM | Flatpak: flatpak: sandboxed app can signal unsandboxed processes in the same process group |
| CVE-2026-102473 | 5.5 MEDIUM | Dash: dash: super-polynomial backtracking in pmatch when libc fnmatch is disabled |
IV. Related Vulnerabilities
Same product: Red Hat Enterprise Linux 6
-
CVE-2026-102473
Dash: dash: super-polynomial backtracking in pmatch when lib -
CVE-2026-90947
Gimp: gimp: out-of-bounds write in lighting effects plugin v -
CVE-2026-90949
Gimp: gimp: heap-based buffer overflow in psp loader due to -
CVE-2026-90948
Gimp: gimp: heap-based buffer overflow in ico loader via int -
CVE-2026-88859
Evolution: evolution: javascript execution via spoofed vcard
Same vendor: Red Hat
-
CVE-2026-95520
Rpm: rpm: integer overflow in iterreadarchivenext() leads to -
CVE-2026-102473
Dash: dash: super-polynomial backtracking in pmatch when lib -
CVE-2026-97029
Flatpak: flatpak: sandboxed app can signal unsandboxed proce -
CVE-2026-97024
Flatpak: flatpak: arbitrary write in root context via path t -
CVE-2026-97027
Flatpak: flatpak: denial of service via unsanitized keys in
Same weakness: CWE-787
-
CVE-2026-95520
Rpm: rpm: integer overflow in iterreadarchivenext() leads to -
CVE-2026-15390
Out-of-bounds write in Das U-Boot -
CVE-2026-101203
FastStone Image Viewer 1bpp RLE Decoder out-of-bounds write -
CVE-2026-101202
FastStone Image Viewer TGA Image out-of-bounds write -
CVE-2026-18415
Out-of-bounds write in the IEEE 802.15.4 L2 transmit path fo
V. Comments for CVE-2026-102474
No comments yet