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CVE-2026-88841

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

3.3 LowFix available

This update for busybox fixes the following issues:

  • CVE-2026-88830: unit confusion in TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted ClientKeyExchange message (bsc#1282575).
  • CVE-2026-88831: httpd silently fails open when IP deny rules contain invalid CIDR prefix lengths (bsc#1282550).
  • CVE-2026-88832: romfs volume ID parsing uses unbounded strlen on attacker-controlled metadata and allows for a heap buffer overflow when crafted filesystem images are processed (bsc#1282576).
  • CVE-2026-88835: dpkg read_package_field() steps past NUL terminator, causing out-of-bounds read on malformed .deb packages (bsc#1282551).
  • CVE-2026-88837: httpd misidentifies yescrypt password hashes as plaintext (bsc#1282552).
  • CVE-2026-88839: passwd/group parser writes heap pointers out of bounds due to stale tokenize() endpoint (bsc#1282568).
  • CVE-2026-88841: OOB read and silent memory corruption of the status file due to write_status_file() failing to reset the field_start cursor between package stanzas (bsc#1282653).

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
None
Integrity
Low
Availability
None

What each source reports

OSV Score usedRHSA-2026:73514 3.3

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Record
RHSA-2026:73514
CVSS 3.1
3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated
2026-11-02
OSVopenSUSE-SU-2026:11954-1 No score

busybox-1.38.0-3.1 on GA media

These are all security issues fixed in the busybox-1.38.0-3.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:11954-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:22067-1 No score

Security update for busybox

This update for busybox fixes the following issues:

  • CVE-2026-88830: unit confusion in TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted ClientKeyExchange message (bsc#1282575).
  • CVE-2026-88831: httpd silently fails open when IP deny rules contain invalid CIDR prefix lengths (bsc#1282550).
  • CVE-2026-88832: romfs volume ID parsing uses unbounded strlen on attacker-controlled metadata and allows for a heap buffer overflow when crafted filesystem images are processed (bsc#1282576).
  • CVE-2026-88835: dpkg read_package_field() steps past NUL terminator, causing out-of-bounds read on malformed .deb packages (bsc#1282551).
  • CVE-2026-88837: httpd misidentifies yescrypt password hashes as plaintext (bsc#1282552).
  • CVE-2026-88839: passwd/group parser writes heap pointers out of bounds due to stale tokenize() endpoint (bsc#1282568).
  • CVE-2026-88841: OOB read and silent memory corruption of the status file due to write_status_file() failing to reset the field_start cursor between package stanzas (bsc#1282653).
Record
openSUSE-SU-2026:22067-1
Updated
2026-11-02
OSVSUSE-SU-2026:24137-1 No score

Security update for busybox

This update for busybox fixes the following issues:

  • CVE-2026-88830: unit confusion in TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted ClientKeyExchange message (bsc#1282575).
  • CVE-2026-88831: httpd silently fails open when IP deny rules contain invalid CIDR prefix lengths (bsc#1282550).
  • CVE-2026-88832: romfs volume ID parsing uses unbounded strlen on attacker-controlled metadata and allows for a heap buffer overflow when crafted filesystem images are processed (bsc#1282576).
  • CVE-2026-88835: dpkg read_package_field() steps past NUL terminator, causing out-of-bounds read on malformed .deb packages (bsc#1282551).
  • CVE-2026-88837: httpd misidentifies yescrypt password hashes as plaintext (bsc#1282552).
  • CVE-2026-88839: passwd/group parser writes heap pointers out of bounds due to stale tokenize() endpoint (bsc#1282568).
  • CVE-2026-88841: OOB read and silent memory corruption of the status file due to write_status_file() failing to reset the field_start cursor between package stanzas (bsc#1282653).
Record
SUSE-SU-2026:24137-1
Updated
2026-11-02
OSVSUSE-SU-2026:24215-1 No score

Security update for busybox

This update for busybox fixes the following issues:

  • CVE-2026-88830: unit confusion in TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted ClientKeyExchange message (bsc#1282575).
  • CVE-2026-88831: httpd silently fails open when IP deny rules contain invalid CIDR prefix lengths (bsc#1282550).
  • CVE-2026-88832: romfs volume ID parsing uses unbounded strlen on attacker-controlled metadata and allows for a heap buffer overflow when crafted filesystem images are processed (bsc#1282576).
  • CVE-2026-88835: dpkg read_package_field() steps past NUL terminator, causing out-of-bounds read on malformed .deb packages (bsc#1282551).
  • CVE-2026-88837: httpd misidentifies yescrypt password hashes as plaintext (bsc#1282552).
  • CVE-2026-88839: passwd/group parser writes heap pointers out of bounds due to stale tokenize() endpoint (bsc#1282568).
  • CVE-2026-88841: OOB read and silent memory corruption of the status file due to write_status_file() failing to reset the field_start cursor between package stanzas (bsc#1282653).
Record
SUSE-SU-2026:24215-1
Updated
2026-11-02
OSVSUSE-SU-2026:4760-1 No score

Security update for busybox

This update for busybox fixes the following issues:

  • CVE-2026-88830: unit confusion in TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted ClientKeyExchange message (bsc#1282575).
  • CVE-2026-88831: httpd silently fails open when IP deny rules contain invalid CIDR prefix lengths (bsc#1282550).
  • CVE-2026-88832: romfs volume ID parsing uses unbounded strlen on attacker-controlled metadata and allows for a heap buffer overflow when crafted filesystem images are processed (bsc#1282576).
  • CVE-2026-88835: dpkg read_package_field() steps past NUL terminator, causing out-of-bounds read on malformed .deb packages (bsc#1282551).
  • CVE-2026-88837: httpd misidentifies yescrypt password hashes as plaintext (bsc#1282552).
  • CVE-2026-88839: passwd/group parser writes heap pointers out of bounds due to stale tokenize() endpoint (bsc#1282568).
  • CVE-2026-88841: OOB read and silent memory corruption of the status file due to write_status_file() failing to reset the field_start cursor between package stanzas (bsc#1282653).
Record
SUSE-SU-2026:4760-1
Updated
2026-11-02
OSVSUSE-SU-2026:4773-1 No score

Security update for busybox

This update for busybox fixes the following issues:

  • CVE-2026-88830: unit confusion in TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted ClientKeyExchange message (bsc#1282575).
  • CVE-2026-88831: httpd silently fails open when IP deny rules contain invalid CIDR prefix lengths (bsc#1282550).
  • CVE-2026-88832: romfs volume ID parsing uses unbounded strlen on attacker-controlled metadata and allows for a heap buffer overflow when crafted filesystem images are processed (bsc#1282576).
  • CVE-2026-88835: dpkg read_package_field() steps past NUL terminator, causing out-of-bounds read on malformed .deb packages (bsc#1282551).
  • CVE-2026-88837: httpd misidentifies yescrypt password hashes as plaintext (bsc#1282552).
  • CVE-2026-88839: passwd/group parser writes heap pointers out of bounds due to stale tokenize() endpoint (bsc#1282568).
  • CVE-2026-88841: OOB read and silent memory corruption of the status file due to write_status_file() failing to reset the field_start cursor between package stanzas (bsc#1282653).
Record
SUSE-SU-2026:4773-1
Updated
2026-11-02
OSVSUSE-SU-2026:4798-1 No score

Security update for busybox

This update for busybox fixes the following issues:

  • CVE-2026-88830: unit confusion in TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted ClientKeyExchange message (bsc#1282575).
  • CVE-2026-88831: httpd silently fails open when IP deny rules contain invalid CIDR prefix lengths (bsc#1282550).
  • CVE-2026-88832: romfs volume ID parsing uses unbounded strlen on attacker-controlled metadata and allows for a heap buffer overflow when crafted filesystem images are processed (bsc#1282576).
  • CVE-2026-88835: dpkg read_package_field() steps past NUL terminator, causing out-of-bounds read on malformed .deb packages (bsc#1282551).
  • CVE-2026-88837: httpd misidentifies yescrypt password hashes as plaintext (bsc#1282552).
  • CVE-2026-88839: passwd/group parser writes heap pointers out of bounds due to stale tokenize() endpoint (bsc#1282568).
  • CVE-2026-88841: OOB read and silent memory corruption of the status file due to write_status_file() failing to reset the field_start cursor between package stanzas (bsc#1282653).
Record
SUSE-SU-2026:4798-1
Updated
2026-11-02
OSVUBUNTU-CVE-2026-88841 No score

[Unknown description]

Record
UBUNTU-CVE-2026-88841
Updated
2026-11-02

Affected packages

Affected packages
PackageAffectedFixed
busybox
Debian:12
 All versions, plus listed versions
1:1.35.0-41:1.35.0-4+deb12u11:1.36.0-1~exp11:1.36.1-11:1.36.1-2
Show 23 moreShow less
1:1.36.1-31:1.36.1-3.11:1.36.1-41:1.36.1-51:1.36.1-61:1.36.1-6~exp.11:1.36.1-71:1.36.1-81:1.36.1-91:1.37.0-11:1.37.0-101:1.37.0-10.11:1.37.0-21:1.37.0-31:1.37.0-41:1.37.0-51:1.37.0-61:1.37.0-71:1.37.0-81:1.37.0-91:1.38.0-11:1.38.0-21:1.38.0-3
 None known
busybox
Debian:13
 All versions, plus listed versions
1:1.37.0-101:1.37.0-10.11:1.37.0-61:1.37.0-71:1.37.0-8
Show 4 moreShow less
1:1.37.0-91:1.38.0-11:1.38.0-21:1.38.0-3
 None known
busybox
Debian:14
 All versions, plus listed versions
1:1.37.0-101:1.37.0-10.11:1.37.0-61:1.37.0-71:1.37.0-8
Show 4 moreShow less
1:1.37.0-91:1.38.0-11:1.38.0-21:1.38.0-3
 None known
busybox
Red Hat:hummingbird:1
 before 0:1.37.0-9.2.hum1
0:1.37.0-9.2.hum1
busybox-petitboot
Red Hat:hummingbird:1
 before 0:1.37.0-9.2.hum1
0:1.37.0-9.2.hum1
busybox-shared
Red Hat:hummingbird:1
 before 0:1.37.0-9.2.hum1
0:1.37.0-9.2.hum1
busybox
SUSE:Linux Micro 6.0
From an advisory covering 7 CVEs
 before 1.36.1-159998.1.1
1.36.1-159998.1.1
busybox
SUSE:Linux Enterprise Server 16.0
From an advisory covering 7 CVEs
 before 1.37.0-160000.8.1
1.37.0-160000.8.1
busybox
SUSE:Linux Enterprise Server for SAP applications 16.0
From an advisory covering 7 CVEs
 before 1.37.0-160000.8.1
1.37.0-160000.8.1
busybox
SUSE:Linux Enterprise Module for Basesystem 15 SP7
From an advisory covering 7 CVEs
 before 1.37.0-150700.18.24.1
1.37.0-150700.18.24.1
Show 16 moreShow less
Affected packages
PackageAffectedFixed
busybox
SUSE:Linux Enterprise Server 12 SP5-LTSS
From an advisory covering 7 CVEs
 before 1.35.0-10.12.1
1.35.0-10.12.1
busybox
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5
From an advisory covering 7 CVEs
 before 1.35.0-10.12.1
1.35.0-10.12.1
busybox
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS
From an advisory covering 7 CVEs
 before 1.35.0-150400.3.23.1
1.35.0-150400.3.23.1
busybox
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS
From an advisory covering 7 CVEs
 before 1.35.0-150400.3.23.1
1.35.0-150400.3.23.1
busybox
SUSE:Linux Enterprise Server 15 SP4-LTSS
From an advisory covering 7 CVEs
 before 1.35.0-150400.3.23.1
1.35.0-150400.3.23.1
busybox
SUSE:Linux Enterprise Server for SAP Applications 15 SP4
From an advisory covering 7 CVEs
 before 1.35.0-150400.3.23.1
1.35.0-150400.3.23.1
busybox
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
1:1.20.0-8.1ubuntu11:1.20.0-9ubuntu11:1.20.0-9ubuntu21:1.21.0-1ubuntu11:1.21.0-1ubuntu1.41:1.21.0-1ubuntu1.4+esm1
 None known
busybox
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
1:1.22.0-15ubuntu11:1.22.0-15ubuntu1.41:1.22.0-15ubuntu1.4+esm11:1.22.0-15ubuntu1.4+esm2
 None known
busybox
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
1:1.22.0-19ubuntu21:1.27.2-1ubuntu31:1.27.2-1ubuntu41:1.27.2-2ubuntu21:1.27.2-2ubuntu3
Show 5 moreShow less
1:1.27.2-2ubuntu3.11:1.27.2-2ubuntu3.21:1.27.2-2ubuntu3.31:1.27.2-2ubuntu3.41:1.27.2-2ubuntu3.4+esm1
 None known
busybox
Ubuntu:20.04:LTS
 All versions, plus listed versions
1:1.30.1-4ubuntu41:1.30.1-4ubuntu51:1.30.1-4ubuntu61:1.30.1-4ubuntu6.11:1.30.1-4ubuntu6.21:1.30.1-4ubuntu6.31:1.30.1-4ubuntu6.41:1.30.1-4ubuntu6.5
 None known
busybox
Ubuntu:22.04:LTS
 All versions, plus listed versions
1:1.30.1-6ubuntu31:1.30.1-7ubuntu11:1.30.1-7ubuntu21:1.30.1-7ubuntu31:1.30.1-7ubuntu3.1
 None known
busybox
Ubuntu:24.04:LTS
 All versions, plus listed versions
1:1.36.1-3ubuntu11:1.36.1-6ubuntu11:1.36.1-6ubuntu31:1.36.1-6ubuntu3.1
 None known
busybox
Ubuntu:26.10
 All versions, plus listed versions
1:1.37.0-7ubuntu11:1.37.0-10.1ubuntu21:1.37.0-10.1ubuntu31:1.38.0-3ubuntu11:1.38.0-3ubuntu31:1.38.0-3ubuntu4
 None known
busybox
Ubuntu:26.04:LTS
 All versions, plus listed versions
1:1.37.0-4ubuntu11:1.37.0-7ubuntu1
 None known
busybox
openSUSE:Tumbleweed
From an advisory covering 7 CVEs
 before 1.38.0-3.1
1.38.0-3.1
busybox
openSUSE:Leap 16.0
From an advisory covering 7 CVEs
 before 1.37.0-160000.8.1
1.37.0-160000.8.1

History

History
RecordedChangedSources
affected, facts
first indexedOSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-88841 is a low vulnerability (CVSS 3.3) in busybox, published September 28, 2026. No source lists public exploit code. Fixed in busybox 0:1.37.0-9.2.hum1.

References

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