Upstream information

CVE-2026-25541 at MITRE

Description

Bytes is a utility library for working with bytes. From version 1.2.1 to before 1.11.1, Bytes is vulnerable to integer overflow in BytesMut::reserve. In the unique reclaim path of BytesMut::reserve, if the condition "v_capacity >= new_cap + offset" uses an unchecked addition. When new_cap + offset overflows usize in release builds, this condition may incorrectly pass, causing self.cap to be set to a value that exceeds the actual allocated capacity. Subsequent APIs such as spare_capacity_mut() then trust this corrupted cap value and may create out-of-bounds slices, leading to UB. This behavior is observable in release builds (integer overflow wraps), whereas debug builds panic due to overflow checks. This issue has been patched in version 1.11.1.

SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail National Vulnerability Database SUSE
Base Score 7.5 7.5
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network Network
Attack Complexity Low Low
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact None None
Availability Impact High High
CVSSv3 Version 3.1 3.1
CVSS v4 Scores
CVSS detail CNA (GitHub)
Base Score 5.5
Vector CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity Low
Attack Requirements None
Privileges Required None
User Interaction None
Vulnerable System Confidentiality Impact None
Vulnerable System Integrity Impact None
Vulnerable System Availability Impact High
Subsequent System Confidentiality Impact None
Subsequent System Integrity Impact None
Subsequent System Availability Impact None
CVSSv4 Version 4.0
SUSE Bugzilla entry: 1271347 [NEW]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Linux Enterprise Micro 5.3
  • afterburn >= 5.10.0.git73.b97f772-150400.3.6.1
  • afterburn-dracut >= 5.10.0.git73.b97f772-150400.3.6.1
 Patchnames:
SUSE-SLE-Micro-5.3-2026-2976
SUSE Linux Enterprise Micro 5.4
  • afterburn >= 5.10.0.git73.b97f772-150400.3.6.1
  • afterburn-dracut >= 5.10.0.git73.b97f772-150400.3.6.1
 Patchnames:
SUSE-SLE-Micro-5.4-2026-2977
SUSE Linux Enterprise Micro 5.5
  • afterburn >= 5.10.0.git73.b97f772-150500.3.6.1
  • afterburn-dracut >= 5.10.0.git73.b97f772-150500.3.6.1
 Patchnames:
SUSE-SLE-Micro-5.5-2026-2975
SUSE Package Hub 15 SP7
  • afterburn >= 5.10.0.git73.b97f772-bp157.2.9.1
  • afterburn-dracut >= 5.10.0.git73.b97f772-bp157.2.9.1
 Patchnames:
openSUSE-2026-243
openSUSE Tumbleweed
  • afterburn >= 5.10.0.git73.b97f772-1.1
  • afterburn-dracut >= 5.10.0.git73.b97f772-1.1
 Patchnames:
openSUSE-Tumbleweed-2026-11255

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Micro 5.3 afterburn Released
SUSE Linux Enterprise Micro 5.4 afterburn Released
SUSE Linux Enterprise Micro 5.5 afterburn Released
SUSE Linux Enterprise Micro for Rancher 5.3 afterburn Released
SUSE Linux Enterprise Micro for Rancher 5.4 afterburn Released
SUSE Linux Enterprise Server 16.0 afterburn In progress
SUSE Linux Enterprise Server 16.1 afterburn Released
SUSE Linux Enterprise Server for SAP applications 16.0 afterburn In progress
SUSE Linux Enterprise Server for SAP applications 16.1 afterburn Released
SUSE Linux Micro 6.0 afterburn Affected
SUSE Linux Micro 6.1 afterburn Affected
SUSE Linux Micro 6.2 afterburn In progress
SUSE Package Hub 15 SP7 afterburn Released
openSUSE Leap 16.0 afterburn Affected
Products past their end of life and not receiving proactive updates anymore.
openSUSE Leap Micro 5.3 afterburn Affected
openSUSE Leap Micro 5.4 afterburn Affected
openSUSE Leap Micro 5.5 afterburn Affected

SUSE Timeline for this CVE

CVE page created: Mon Jul 13 11:26:18 2026
CVE page last modified: Wed Jul 15 17:25:14 2026