Description
Xenstore: guests can let run xenstored out of memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Malicious guests can cause xenstored to allocate vast amounts of memory, eventually resulting in a Denial of Service (DoS) of xenstored. There are multiple ways how guests can cause large memory allocations in xenstored: - - by issuing new requests to xenstored without reading the responses, causing the responses to be buffered in memory - - by causing large number of watch events to be generated via setting up multiple xenstore watches and then e.g. deleting many xenstore nodes below the watched path - - by creating as many nodes as allowed with the maximum allowed size and path length in as many transactions as possible - - by accessing many nodes inside a transaction
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Xen | xen | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | xen | 4.16.2+90-g0d39a6d1ae-1 | — |
| Debian 13 | xen | 4.16.2+90-g0d39a6d1ae-1 | — |
| Debian 12 | xen | 4.16.2+90-g0d39a6d1ae-1 | — |
| Debian 11 | xen | 4.14.5+86-g1c354767d5-1 | DSA-5272-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | xen | No fix yet | — |
| Ubuntu 26.04 LTS | xen | No fix yet | — |
| Ubuntu 25.10 | xen | No fix yet | — |
| Ubuntu 24.04 LTS | xen | No fix yet | — |
| Ubuntu 22.04 LTS | xen | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | xen | No fix yet | — |
| Ubuntu 18.04 LTS | xen | No fix yet | — |
| Ubuntu 16.04 LTS | xen | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | xen | 4.16.2_08-150400.4.16.1 | SUSE-SU-2022:4007-1 |
| SLES 15 SP3 | xen | 4.14.5_08-150300.3.40.1 | SUSE-SU-2022:3947-1 |
| SLES 15 SP2 | xen | 4.13.4_16-150200.3.65.1 | SUSE-SU-2022:3971-1 |
| SLES 15 SP1 | xen | 4.12.4_30-150100.3.80.1 | SUSE-SU-2022:3928-1 |
| SLES 12 SP5 | xen | 4.12.4_30-3.82.1 | SUSE-SU-2022:4332-1 |
Show 21 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | xen | 4.11.4_34-2.83.1 | SUSE-SU-2022:4241-1 |
| SLES 12 SP3 | xen | 4.9.4_34-3.114.1 | SUSE-SU-2022:3960-1 |
| SLES 12 SP2 | xen | 4.7.6_28-43.98.1 | SUSE-SU-2022:4051-1 |
| SLES for SAP 15 SP2 | xen | 4.13.4_16-150200.3.65.1 | SUSE-SU-2022:3971-1 |
| SLES for SAP 15 SP1 | xen | 4.12.4_30-150100.3.80.1 | SUSE-SU-2022:3928-1 |
| SLES for SAP 15 | xen | 4.10.4_40-150000.3.84.1 | SUSE-SU-2022:3925-1 |
| SLES for SAP 12 SP5 | xen | 4.12.4_30-3.82.1 | SUSE-SU-2022:4332-1 |
| SLES for SAP 12 SP4 | xen | 4.11.4_34-2.83.1 | SUSE-SU-2022:4241-1 |
| SLE Micro 5.3 | xen | 4.16.2_08-150400.4.16.1 | SUSE-SU-2022:4007-1 |
| SLE Micro 5.2 | xen | 4.14.5_08-150300.3.40.1 | SUSE-SU-2022:3947-1 |
| SLE Micro 5.1 | xen | 4.14.5_08-150300.3.40.1 | SUSE-SU-2022:3947-1 |
| SLE HPC 15 SP2 | xen | 4.13.4_16-150200.3.65.1 | SUSE-SU-2022:3971-1 |
| SLE HPC 15 SP1 | xen | 4.12.4_30-150100.3.80.1 | SUSE-SU-2022:3928-1 |
| SLE HPC 15 | xen | 4.10.4_40-150000.3.84.1 | SUSE-SU-2022:3925-1 |
| SUSE OpenStack Cloud Crowbar 9 | xen | 4.11.4_34-2.83.1 | SUSE-SU-2022:4241-1 |
| SUSE OpenStack Cloud 9 | xen | 4.11.4_34-2.83.1 | SUSE-SU-2022:4241-1 |
| SUSE Manager Server 4.1 | xen | 4.13.4_16-150200.3.65.1 | SUSE-SU-2022:3971-1 |
| SUSE Manager Retail Branch Server 4.1 | xen | 4.13.4_16-150200.3.65.1 | SUSE-SU-2022:3971-1 |
| SUSE Manager Proxy 4.1 | xen | 4.13.4_16-150200.3.65.1 | SUSE-SU-2022:3971-1 |
| SUSE Enterprise Storage 7 | xen | 4.13.4_16-150200.3.65.1 | SUSE-SU-2022:3971-1 |
| SUSE Enterprise Storage 6 | xen | 4.12.4_30-150100.3.80.1 | SUSE-SU-2022:3928-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | xen | 4.16.2_08-150400.4.16.1 | SUSE-SU-2022:4007-1 |
| openSUSE Leap 15.3 | xen | 4.14.5_08-150300.3.40.1 | SUSE-SU-2022:3947-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.2 | xen | 4.14.5_08-150300.3.40.1 | SUSE-SU-2022:3947-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.17.0-r0 | — |
| Alpine v3.23 | xen | 4.17.0-r0 | — |
| Alpine v3.22 | xen | 4.17.0-r0 | — |
| Alpine v3.21 | xen | 4.17.0-r0 | — |
| Alpine v3.20 | xen | 4.17.0-r0 | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.17.0-r0 | — |
| Alpine v3.18 | xen | 4.17.0-r0 | — |
| Alpine v3.17 | xen | 4.16.3-r0 | — |
| Alpine v3.16 | xen | 4.16.3-r0 | — |
| Alpine v3.15 | xen | 4.15.4-r0 | — |
| Alpine v3.14 | xen | 4.15.4-r0 | — |
Advisories 11
- DSA-5272-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2022:3947-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3925-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4332-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3928-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4007-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3960-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4051-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4241-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3971-1 Security update for xen SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2022-1939 Xen: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 4, 2024
References
- https://xenbits.xenproject.org/xsa/advisory-326.txt
- http://xenbits.xen.org/xsa/advisory-326.html
- DSA-5272 vendor-advisory
- FEDORA-2022-07438e12df vendor-advisory
- FEDORA-2022-99af00f60e vendor-advisory
- FEDORA-2022-9f51d13fa3 vendor-advisory