CVE-2026-39824

Invoking integer overflow in NewNTUnicodeString in golang.org/x/sys/windows

3.3 LowFix available

NewNTUnicodeString does not check for string length overflow. When provided with a string that overflows the maximum size of a NTUnicodeString (a 16-bit number of bytes), it returns a truncated string rather than an error.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: None

Exploit likelihood

0.11%Up 0.1 points since May 23, 2026

What each source reports

CVE List Score used 3.3

Invoking integer overflow in NewNTUnicodeString in golang.org/x/sys/windows

Record: CVE-2026-39824
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-190
Updated: 2026-11-02

EUVDEUVD-2026-31498 3.3

Record: EUVD-2026-31498
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-4vpj-hr3r-4gpg 3.3

NewNTUnicodeString does not check for string length overflow. When provided with a string that...

Record: GHSA-4vpj-hr3r-4gpg
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-190
Updated: 2026-11-02

NVD 3.3

Record: CVE-2026-39824
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-190
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-39824 3.3

Record: UBUNTU-CVE-2026-39824
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVAZL-111581 No score

CVE-2026-39824 affecting package kubevirt-openvmm 1.9.0-1

Record: AZL-111581
Updated: 2026-11-05

Show 13 moreShow less

OSVAZL-87161 No score

CVE-2026-39824 affecting package azl-otel-collector 0.127.0-1

Record: AZL-87161
Updated: 2026-11-05

OSVAZL-87164 No score

CVE-2026-39824 affecting package buildah 1.43.1-3

Record: AZL-87164
Updated: 2026-11-05

OSVAZL-87215 No score

CVE-2026-39824 affecting package cri-o 1.30.1-1

Record: AZL-87215
Updated: 2026-11-05

OSVAZL-87269 No score

CVE-2026-39824 affecting package kata-containers-preview 3.27.0~preview2-2

Record: AZL-87269
Updated: 2026-11-05

OSVAZL-87299 No score

CVE-2026-39824 affecting package podman 5.6.1-10

Record: AZL-87299
Updated: 2026-11-05

OSVAZL-98697 No score

CVE-2026-39824 affecting package golang 1.27.1-1

Record: AZL-98697
Updated: 2026-11-02

OSVGO-2026-5024 No score

Invoking integer overflow in NewNTUnicodeString in golang.org/x/sys/windows

Record: GO-2026-5024
Updated: 2026-11-02

OSVopenSUSE-SU-2026:10856-1 No score

rclone-1.74.2-1.1 on GA media

These are all security issues fixed in the rclone-1.74.2-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2026:10856-1
Updated: 2026-11-02

OSVopenSUSE-SU-2026:11306-1 No score

kbfs-6.6.3-3.1 on GA media

These are all security issues fixed in the kbfs-6.6.3-3.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2026:11306-1
Updated: 2026-11-02

OSVopenSUSE-SU-2026:21436-1 No score

Security update for rclone

This update for rclone fixes the following issues:

Changes in rclone:

Update to version 1.74.4 (boo#1267192):
- Version v1.74.4
- gui: update embedded release to 1.1.10
- local: stop --links symlinks escaping the destination directory CVE-2026-54572
- local: don't restore setuid/setgid/sticky bits from metadata by default GHSA-945v-v9p3-v5xw
- s3: strip STS security token on same-host HTTPS->HTTP redirect GHSA-cf44-9pgv-m4xc
- serve restic: fix --private-repos isolation bypass CVE-2026-59733
- archive extract: fix path traversal letting archives escape the destination CVE-2026-59732
- serve s3: fix path traversal letting clients see files in the root GHSA-8v25-v8p6-qf7v
- build: fix multiple CVEs by upgrading to go1.26.5
- s3: fix mounting a prefix failing with 403 when HEAD is not permitted
- drive, googlephotos: warn when using rclone's shared client_id #9580
- drive: fix stray %!(EXTRA) in unexportable google document log message
- serve/http: fix --disable-zip so it works over rc
- serve webdav: fix MOVE overwrite failing without Overwrite header
- fs: fix negative offset when a suffix Range request exceeds object size
- accounting: fix goroutine leak in NewStatsGroup for zero-transfer rc jobs
- cmd/mount2: fix NFS directory listings by supporting non-zero Seekdir offsets
- cmd/mount2: fix ESTALE over NFS by reporting stable inode numbers
- cmd/mount2: fix NFS file creation by implementing Mknod
- smb: fix for IBM iSeries and signature verification
- mega: fix hard deleted files reappearing in listings - fixes #9554
- mega: wait for server events after upload, delete and move
- vfs: fix hang reopening a file during the handle-caching grace period
- s3: correct documented copy_cutoff minimum to 1 byte - Fixes #7391
- fs: fix command line flag being ignored when set to its default value
- docs: fix copy to clipboard functionality for code blocks
- fs/operations: correct DeleteFile --backup-dir documentation
- build: update golang.org/x/image to v0.43.0 to fix image decoding vulnerabilities
- docs: clarify copyto command description - Fixes #9527
- docs: fix typo in remote setup docs
- serve s3: fix spurious 404 on HEAD/GET during VFS writeback - fixes #8188
- - s3: fix error mapping in GetObject to match HeadObject
- filter: fix --files-from copy stopping at the first unreadable file
- docs: Fix RELEASE.md
- ncdu: fix duplicated keystrokes on Windows by pinning tcell to v2.9.0
- completion: fix powershell completion corrupting non-ASCII names - fixes #9412
- docs/crypt: fix encrypted size example - Fixes #9202
- docs: drive: note Google verification exemption for personal use apps
- rc: document that rc API access is equivalent to shell access
- docs: drive: update documentation about "Computers" folder
- accounting: fix goroutine leak in ResetCounters
- docs: fix --windows-event-log-level help
- backend/filelu: fix recursive listing path handling and file filtering
- docs: bisync - clarify flag interaction and minor changes
- docs: Update RELEASE.md to use cherry-pick -x
- webdav: fix mixed property statuses in multi-status responses
- s3: remove session token on cross-host redirects
- drive: warn when non-exportable Google documents are skipped - #9475
- Start v1.74.4-DEV development
update x/image to 0.43 (bsc#1271056)
Update to version 1.74.3: (boo#1267869)
- Bug Fixes
  - rc
    - Fix unauthenticated command execution via --rc-serve inline remotes CVE-2026-49980 (Nick Craig-Wood)
    - Stop global.* connection string options changing config CVE-2026-49980 (Nick Craig-Wood)
  - build: Fix multiple CVEs by upgrading to go1.26.4 (Nick Craig-Wood)
    - CVE-2026-42504: mime: quadratic complexity in WordDecoder.DecodeHeader
    - CVE-2026-42507: net/textproto: arbitrary input are included in errors without any escaping
    - CVE-2026-27145: crypto/x509: split…

Record: openSUSE-SU-2026:21436-1
Updated: 2026-11-02

OSVopenSUSE-SU-2026:21471-1 No score

Security update for keybase-client

This update for keybase-client fixes the following issues:

Changes in keybase-client:

CVE-2026-39824: failure to reject ASCII-only Punycode-encoded labels

Record: openSUSE-SU-2026:21471-1
Updated: 2026-11-02

OSVopenSUSE-SU-2026:21483-1 No score

Security update for govulncheck-vulndb

This update for govulncheck-vulndb fixes the following issues:

Update to version 0.0.20260723T184607 2026-07-23T18:46:07Z (jsc#PED-11136).

Go CVE Numbering Authority IDs added or updated with aliases:

GO-2026-4730 CVE-2026-33022 GHSA-cv4x-93xx-wgfj
GO-2026-4761 CVE-2026-33211 GHSA-j5q5-j9gm-2w5c
GO-2026-5102 CVE-2026-45021 GHSA-3vcp-chfh-f6r2
GO-2026-5272 CVE-2026-40938 GHSA-94jr-7pqp-xhcq
GO-2026-5486 CVE-2026-40924 GHSA-m2cx-gpqf-qf74
GO-2026-5542 CVE-2026-40090 GHSA-pj97-4p9w-gx3q
GO-2026-5630 CVE-2026-25542 GHSA-rmx9-2pp3-xhcr
GO-2026-5643 CVE-2026-40923 GHSA-rx35-6rhx-7858
GO-2026-5675 CVE-2026-41492 GHSA-vvf7-6rmr-m29q
GO-2026-5711 CVE-2026-40161 GHSA-wjxp-xrpv-xpff
GO-2026-5746 CVE-2026-41567 GHSA-x86f-5xw2-fm2r
GO-2026-5749 CVE-2026-41328 GHSA-x92x-px7w-4gx4
GO-2026-5837 CVE-2026-44840 GHSA-q2m9-6jp9-c6mc
GO-2026-5929 CVE-2026-44342 GHSA-26v7-h57m-gh9m
GO-2026-5930 CVE-2026-33655 GHSA-6qcr-qxgr-m7fv
GO-2026-5933 GHSA-3g4q-2f67-2gvh
GO-2026-5934 GHSA-59qp-cfj3-rp64
GO-2026-5935 GHSA-7856-g3gv-9wq8
GO-2026-5936 CVE-2026-53552 GHSA-26rh-24rg-j3vv
GO-2026-5937 CVE-2026-53508 GHSA-2jcc-mxv7-p3f9
GO-2026-5938 CVE-2026-53553 GHSA-4g5x-hcwm-82jw
GO-2026-5939 CVE-2026-10517 GHSA-698x-9w2p-7vvp
GO-2026-5940 CVE-2026-53572 GHSA-6w3m-4hhp-775q
GO-2026-5941 CVE-2026-53487 GHSA-gvhc-wv3v-7pf8
GO-2026-5942 CVE-2026-46600
GO-2026-5944 CVE-2026-50197 GHSA-659f-rgp5-w4wf
GO-2026-5945 CVE-2026-6815 GHSA-rmxx-v9rj-vpvg
GO-2026-5946 CVE-2026-52831 GHSA-v5px-423j-pf7p
GO-2026-5947 CVE-2026-53649 GHSA-xqhv-chqm-fhcc
GO-2026-5948 CVE-2026-50554 GHSA-588f-fvcv-xhvf
GO-2026-5949 CVE-2026-50553 GHSA-rqrh-8wpv-x7hh
GO-2026-5950 CVE-2026-53602 GHSA-339v-266x-79xr
GO-2026-5951 CVE-2026-10219 GHSA-6jm8-4fhr-5w64
GO-2026-5952 CVE-2026-49834 GHSA-9vcr-p3rj-q5q6
GO-2026-5953 CVE-2026-9094 GHSA-c9w5-qp6m-m395
GO-2026-5956 CVE-2026-55252 GHSA-h5g6-xmh4-hc37
GO-2026-5957 CVE-2026-54158 GHSA-5xfx-xj4h-5p7r
GO-2026-5958 CVE-2026-54068 GHSA-gcm7-57gf-953c
GO-2026-5959 CVE-2026-54072 GHSA-h29v-hj44-q8cv
GO-2026-5961 CVE-2026-54069 GHSA-hvr9-72v2-fff3
GO-2026-5962 CVE-2026-54088 GHSA-m93h-4hw7-5qcm
GO-2026-5963 CVE-2026-54067 GHSA-mvjr-vv3c-w4qv
GO-2026-5964 CVE-2026-54066 GHSA-p4m3-mgmm-c664
GO-2026-5965 CVE-2026-54070 GHSA-w7cg-whh7-xp28
GO-2026-5966 CVE-2026-54089 GHSA-xqp3-jq6g-x3qm
GO-2026-5967 CVE-2026-50551 GHSA-56mp-4f3v-fgj2
GO-2026-5968 CVE-2026-54174 GHSA-fpg8-7664-jc5q
GO-2026-5969 GHSA-g936-7jqj-mwv8
GO-2026-5970 CVE-2026-56852
GO-2026-5973 CVE-2026-54250 GHSA-jxr7-mqhw-9p98
GO-2026-5974 CVE-2026-44300 GHSA-wmj8-9953-vff5
GO-2026-5975 CVE-2026-50018 GHSA-42j2-w334-qxw7
GO-2026-5976 CVE-2026-50141 GHSA-g7mm-9vx7-jm7h
GO-2026-5977 CVE-2026-50013 GHSA-qrh4-p6v4-mrfg
GO-2026-5978 CVE-2026-50125 GHSA-qw5r-ppcg-f8rj
GO-2026-5979 CVE-2026-50006 GHSA-xrcf-6jh3-ggvx
GO-2026-5980 CVE-2026-50158 GHSA-2c7f-fxww-6w6c
GO-2026-5981 GHSA-mqxv-9rm6-w8qc
GO-2026-5982 GHSA-pqg7-v6wh-3pfp
GO-2026-5984 CVE-2026-53604 GHSA-2p2f-px33-4vv5
GO-2026-5985 GHSA-7rx3-5wx3-5v76
GO-2026-5986 CVE-2026-61699 GHSA-cm26-5974-52h8
GO-2026-5987 CVE-2026-55513 GHSA-g4x6-jcvr-9m3g
GO-2026-5988 CVE-2026-54628 GHSA-hwrq-8wxh-q4xv
GO-2026-5989 CVE-2026-55512 GHSA-m3cx-mwpg-32jg
GO-2026-5990 CVE-2026-54629 GHSA-mf78-3rpf-r784
GO-2026-5991 CVE-2026-53603 GHSA-q4vm-pq3q-8wgq
GO-2026-5992 CVE-2026-61549 GHSA-qf34-295c-26v8
GO-2026-5996 CVE-2026-54450 GHSA-pph6-vfjv-vpjw
GO-2026-5997 CVE-2026-54452 GHSA-xgch-x3mx-cm3c
GO-2026-5998 CVE-2026-54495 GHSA-398h-7f66-3h4p
GO-2026-5999 CVE-2026-10814 GHSA-jh6h-v6mp-h22v
GO-2026-6002 CVE-2026-58196 GHSA-pr64-jmmf-jp54
GO-2026-6003 CVE-2026-53714 GHSA-22xc-xg2r-9j7v
GO-2026-6004 CVE-2026-52833 GHSA-3v79-m2cg-89ww
GO-2026-6005 CVE-2026-53715 GHSA-8fv2-88gg-hm7q
GO-2026-6006 CVE-2026-53716 GHSA-cxpq-8v7q-cg56 *…

Record: openSUSE-SU-2026:21483-1
Updated: 2026-11-02

OSVopenSUSE-SU-2026:21492-1 No score

Security update for keybase-client

This update for keybase-client fixes the following issues:

Changes in keybase-client:

CVE-2026-39824: failure to reject ASCII-only Punycode-encoded labels

Record: openSUSE-SU-2026:21492-1
Updated: 2026-11-02

Affected products

golang.org/x/sys golang.org/x/sys/windows

Affected packages

Affected packages
Package	Affected	Fixed
`kubevirt-openvmm` Azure Linux:3	through 1.9.0-1	None known
`azl-otel-collector` Azure Linux:3	through 0.127.0-1	None known
`buildah` Azure Linux:3	through 1.43.1-3	None known
`cri-o` Azure Linux:3	through 1.30.1-1	None known
`kata-containers-preview` Azure Linux:3	through 3.27.0~preview2-2	None known
`podman` Azure Linux:3	through 5.6.1-10	None known
`golang` Azure Linux:3	1.27.0 to 1.27.1-1	None known
`golang.org/x/sys` Go	before 0.44.0	0.44.0
`golang-golang-x-sys` Ubuntu:16.04:LTS	All versions, plus listed versions 0.0~git20150612-1	None known
`google-guest-agent` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 20201217.02-0ubuntu1~16.04.020230426.00-0ubuntu2~16.04.320231004.02-0ubuntu1~16.04.120231004.02-0ubuntu1~16.04.220240716.00-0ubuntu1~16.04.020240716.00-0ubuntu1~16.04.0+esm120240716.00-0ubuntu1~16.04.0+esm220240716.00-0ubuntu1~16.04.0+esm3	None known

Show 19 moreShow less

Affected packages
Package	Affected	Fixed
`golang-golang-x-sys` Ubuntu:18.04:LTS	All versions, plus listed versions 0.0~git20170727.0.35ef448-10.0~git20170727.0.35ef448-20.0~git20180308.349b81f-1	None known
`google-guest-agent` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 20201217.02-0ubuntu1~18.04.020210414.00-0ubuntu1~18.04.020210629.00-0ubuntu1~18.04.120220622.00-0ubuntu2~18.04.020220622.00-0ubuntu2~18.04.1 Show 8 moreShow less 20230426.00-0ubuntu2~18.04.020231004.02-0ubuntu1~18.04.220231004.02-0ubuntu1~18.04.320240716.00-0ubuntu1~18.04.020241011.01-0ubuntu1~18.04.020241011.01-0ubuntu1~18.04.0+esm120241011.01-0ubuntu1~18.04.0+esm220241011.01-0ubuntu1~18.04.0+esm3	None known
`google-guest-agent` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 20201217.02-0ubuntu1~20.04.020210414.00-0ubuntu1~20.04.020210629.00-0ubuntu1~20.04.020220622.00-0ubuntu2~20.04.020220622.00-0ubuntu2~20.04.2 Show 11 moreShow less 20230426.00-0ubuntu2~20.04.020231004.02-0ubuntu1~20.04.120231004.02-0ubuntu1~20.04.220231004.02-0ubuntu1~20.04.320231004.02-0ubuntu1~20.04.420240716.00-0ubuntu1~20.04.020241011.01-0ubuntu1~20.04.120250116.00-0ubuntu1~20.04.020250116.00-0ubuntu1~20.04.0+esm120250116.00-0ubuntu1~20.04.0+esm220250116.00-0ubuntu1~20.04.0+esm3	None known
`golang-golang-x-sys` Ubuntu:20.04:LTS	All versions, plus listed versions 0.0~git20190726.fc99dfb-1ubuntu10.0~git20190726.fc99dfb-1ubuntu2	None known
`golang-golang-x-sys` Ubuntu:22.04:LTS	All versions, plus listed versions 0.0~git20210124.22da62e-10.0~git20210806.e5e7981-10.0~git20211117.dee7805-10.0~git20211216.1d35b9e-1	None known
`google-guest-agent` Ubuntu:22.04:LTS	All versions, plus listed versions 20210629.00-0ubuntu120210629.00-0ubuntu220220104.00-0ubuntu120220104.00-0ubuntu220220622.00-0ubuntu2~22.04.0 Show 14 moreShow less 20220622.00-0ubuntu2~22.04.120230426.00-0ubuntu2~22.04.020231004.02-0ubuntu1~22.04.120231004.02-0ubuntu1~22.04.220231004.02-0ubuntu1~22.04.320231004.02-0ubuntu1~22.04.420231004.02-0ubuntu1~22.04.520240716.00-0ubuntu1~22.04.020241011.01-0ubuntu1~22.04.020250116.00-0ubuntu1~22.04.020250116.00-0ubuntu1~22.04.120250116.00-0ubuntu1~22.04.220250116.00-0ubuntu1~22.04.320250116.00-0ubuntu1~22.04.4	None known
`golang-golang-x-sys` Ubuntu:24.04:LTS	All versions, plus listed versions 0.8.0-10.13.0-10.15.0-10.16.0-10.17.0-1	None known
`google-guest-agent` Ubuntu:24.04:LTS	All versions, plus listed versions 20230426.00-0ubuntu320231004.02-0ubuntu120231004.02-0ubuntu320240213.00-0ubuntu120240213.00-0ubuntu2 Show 11 moreShow less 20240213.00-0ubuntu320240213.00-0ubuntu3.120240213.00-0ubuntu3.220240716.00-0ubuntu1~24.04.020240716.00-0ubuntu1~24.04.120241011.01-0ubuntu1~24.04.020250116.00-0ubuntu1~24.04.020250116.00-0ubuntu1~24.04.120250116.00-0ubuntu1~24.04.220250116.00-0ubuntu1~24.04.320250116.00-0ubuntu1~24.04.4	None known
`golang-golang-x-sys` Ubuntu:25.10	All versions, plus listed versions 0.22.0-1	None known
`google-guest-agent` Ubuntu:25.10	All versions, plus listed versions 20250116.00-0ubuntu220250506.01-0ubuntu120250506.01-0ubuntu1.120250506.01-0ubuntu1.2	None known
`golang-golang-x-sys` Ubuntu:26.10	All versions, plus listed versions 0.38.0-10.45.0+dfsg-10.47.0+dfsg-1	None known
`google-guest-agent` Ubuntu:26.10	All versions, plus listed versions 20250506.01-0ubuntu220250506.01-0ubuntu320260819.00+~20260819.00-0ubuntu1	None known
`golang-golang-x-sys` Ubuntu:26.04:LTS	All versions, plus listed versions 0.22.0-10.38.0-1	None known
`google-guest-agent` Ubuntu:26.04:LTS	All versions, plus listed versions 20250506.01-0ubuntu120250506.01-0ubuntu220250506.01-0ubuntu2.1	None known
`rclone` openSUSE:Tumbleweed From an advisory covering 23 CVEs	before 1.74.2-1.1	1.74.2-1.1
`keybase-client` openSUSE:Tumbleweed	before 6.6.3-3.1	6.6.3-3.1
`rclone` openSUSE:Leap 16.0 From an advisory covering 37 CVEs	before 1.74.4-bp160.1.1	1.74.4-bp160.1.1
`govulncheck-vulndb` openSUSE:Leap 16.0 From an advisory covering 1734 CVEs	before 0.0.20260723T184607-160000.1.1	0.0.20260723T184607-160000.1.1
`keybase-client` openSUSE:Leap 16.0	before 6.6.3-bp160.2.1	6.6.3-bp160.2.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected
Nov 5, 2026	facts	OSV
Nov 3, 2026	affected
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2026-39824 is a low vulnerability (CVSS 3.3) in Golang.org/x/sys Golang.org/x/sys/windows, published May 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.11%, the 1st percentile. Fixed in golang.org/x/sys 0.44.0.

References

Show 194 moreShow less

This page doesn't list everything

Left out here: 1,556 references and the rest of 2 source descriptions. The JSON record has them.