Bug 2523260 - CVE-2026-19499 zig: Buffer Overflow in strfmon right-justification padding [epel-all]
Summary: CVE-2026-19499 zig: Buffer Overflow in strfmon right-justification padding [e...
Keywords:
Status: NEW
Alias: None
Product: Fedora EPEL
Classification: Fedora
Component: zig
Version: epel10
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Jan Drögehoff
QA Contact:
URL:
Whiteboard: {"flaws": ["11a1e9f6-bd1a-4251-bbfa-f...
Depends On:
Blocks: CVE-2026-19499
TreeView+ depends on / blocked
 
Reported: 2026-08-25 07:39 UTC by Srikanth Balasubramanian
Modified: 2026-08-25 07:39 UTC (History)
8 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Srikanth Balasubramanian 2026-08-25 07:39:09 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Summary: Buffer Overflow in strfmon right-justification padding:  <br/>
out-of-bounds write in the caller-supplied output buffer caused by using  <br/>
the post-padding length for the in-place `memmove`.<br/>
Requirements to exploit: A reachable application code path must invoke  <br/>
`strfmon` or `strfmon_l` with right-justified width padding and a  <br/>
destination buffer that is large enough for `__printf_buffer_pad` to  <br/>
succeed but not large enough for the subsequent overlong `memmove`. This  <br/>
may arise through attacker-influenced formatting input or through a fixed  <br/>
susceptible formatting pattern in the calling application.<br/>


Note You need to log in before you can comment on or make changes to this bug.