Bug 2531291 - CVE-2026-79516 stb: nothings stb: Local Denial of Service via out-of-bounds read [fedora-all]
Summary: CVE-2026-79516 stb: nothings stb: Local Denial of Service via out-of-bounds r...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: stb
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Ben Beasley
QA Contact:
URL:
Whiteboard: {"flaws": ["bd4e8155-1cee-4df5-8805-8...
Depends On:
Blocks: CVE-2026-79516
TreeView+ depends on / blocked
 
Reported: 2026-09-10 06:27 UTC by Vladimir Vasilev
Modified: 2026-09-19 01:14 UTC (History)
2 users (show)

Fixed In Version: stb-0^20260802.2c980bb-2.fc46 stb-0^20260802.2c980bb-2.fc45 stb-0^20260802.2c980bb-2.el9 stb-0^20260802.2c980bb-2.el10_3 stb-0^20260802.2c980bb-2.el10_4 stb-0^20260802.2c980bb-2.fc43 stb-0-0.61.20260802.2c980bb.el8 stb-0^20260802.2c980bb-2.fc44
Clone Of:
Environment:
Last Closed: 2026-09-10 09:25:39 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github nothings stb issues 1963 0 None open [SECURITY] stbsp_snprintf with count=0 writes null terminator before buffer 2026-09-10 09:02:44 UTC

Description Vladimir Vasilev 2026-09-10 06:27:24 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.

An out-of-bounds read in the stbsp_vsnprintf function (stb_sprintf.h) of nothings stb commit 31c1ad3 allows attackers to cause a Denial of Service (DoS) via sending a crafted input.

Comment 1 Ben Beasley 2026-09-10 09:02:45 UTC
There’s a suggested patch for this in https://github.com/nothings/stb/pull/1995, but it was rejected without comment, presumably because it was drafted with AI/LLM assistance. The patch is straightforward enough and appears sensible enough to consider applying it downstream. Nothing in Fedora currently depends on the stb_sprintf library subpackage.

Comment 2 Fedora Update System 2026-09-10 09:20:58 UTC
FEDORA-2026-ee846faf9d (stb-0^20260802.2c980bb-2.fc46) has been submitted as an update to Fedora 46.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-ee846faf9d

Comment 3 Fedora Update System 2026-09-10 09:25:24 UTC
FEDORA-2026-63e7be05c3 (stb-0^20260802.2c980bb-2.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-63e7be05c3

Comment 4 Fedora Update System 2026-09-10 09:25:39 UTC
FEDORA-2026-ee846faf9d (stb-0^20260802.2c980bb-2.fc46) has been pushed to the Fedora 46 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 5 Fedora Update System 2026-09-10 09:38:47 UTC
FEDORA-2026-2a592f622a (stb-0^20260802.2c980bb-2.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-2a592f622a

Comment 6 Fedora Update System 2026-09-10 09:49:02 UTC
FEDORA-2026-0cae436fa5 (stb-0^20260802.2c980bb-2.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-0cae436fa5

Comment 7 Fedora Update System 2026-09-10 10:29:32 UTC
FEDORA-EPEL-2026-50f70dc75c (stb-0^20260802.2c980bb-2.el10_4) has been submitted as an update to Fedora EPEL 10.4.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-50f70dc75c

Comment 8 Fedora Update System 2026-09-10 18:04:35 UTC
FEDORA-EPEL-2026-30f5385d0c (stb-0^20260802.2c980bb-2.el10_3) has been submitted as an update to Fedora EPEL 10.3.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-30f5385d0c

Comment 9 Fedora Update System 2026-09-10 21:21:44 UTC
FEDORA-EPEL-2026-cdddb2a578 (stb-0^20260802.2c980bb-2.el9) has been submitted as an update to Fedora EPEL 9.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-cdddb2a578

Comment 10 Fedora Update System 2026-09-10 21:48:53 UTC
FEDORA-EPEL-2026-44dc853e3c (stb-0-0.61.20260802.2c980bb.el8) has been submitted as an update to Fedora EPEL 8.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-44dc853e3c

Comment 11 Fedora Update System 2026-09-11 01:09:30 UTC
FEDORA-EPEL-2026-cdddb2a578 has been pushed to the Fedora EPEL 9 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-cdddb2a578

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 12 Fedora Update System 2026-09-11 01:35:20 UTC
FEDORA-2026-63e7be05c3 has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-63e7be05c3`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-63e7be05c3

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 13 Fedora Update System 2026-09-11 01:40:51 UTC
FEDORA-EPEL-2026-30f5385d0c has been pushed to the Fedora EPEL 10.3 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-30f5385d0c

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 14 Fedora Update System 2026-09-11 01:45:19 UTC
FEDORA-EPEL-2026-50f70dc75c has been pushed to the Fedora EPEL 10.4 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-50f70dc75c

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 15 Fedora Update System 2026-09-11 01:51:05 UTC
FEDORA-EPEL-2026-44dc853e3c has been pushed to the Fedora EPEL 8 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-44dc853e3c

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 16 Fedora Update System 2026-09-11 02:08:03 UTC
FEDORA-2026-0cae436fa5 has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-0cae436fa5`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-0cae436fa5

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 17 Fedora Update System 2026-09-11 02:28:02 UTC
FEDORA-2026-2a592f622a has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-2a592f622a`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-2a592f622a

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 18 Fedora Update System 2026-09-19 00:16:44 UTC
FEDORA-2026-63e7be05c3 (stb-0^20260802.2c980bb-2.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 19 Fedora Update System 2026-09-19 00:28:12 UTC
FEDORA-EPEL-2026-cdddb2a578 (stb-0^20260802.2c980bb-2.el9) has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 20 Fedora Update System 2026-09-19 00:31:12 UTC
FEDORA-EPEL-2026-30f5385d0c (stb-0^20260802.2c980bb-2.el10_3) has been pushed to the Fedora EPEL 10.3 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 21 Fedora Update System 2026-09-19 00:42:59 UTC
FEDORA-EPEL-2026-50f70dc75c (stb-0^20260802.2c980bb-2.el10_4) has been pushed to the Fedora EPEL 10.4 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 22 Fedora Update System 2026-09-19 00:57:48 UTC
FEDORA-2026-0cae436fa5 (stb-0^20260802.2c980bb-2.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 23 Fedora Update System 2026-09-19 01:09:12 UTC
FEDORA-EPEL-2026-44dc853e3c (stb-0-0.61.20260802.2c980bb.el8) has been pushed to the Fedora EPEL 8 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 24 Fedora Update System 2026-09-19 01:14:01 UTC
FEDORA-2026-2a592f622a (stb-0^20260802.2c980bb-2.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.


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