Medium severity5.5NVD Advisory· Published Jan 31, 2025· Updated Jun 17, 2026
CVE-2025-21666
CVE-2025-21666
Description
In the Linux kernel, the following vulnerability has been resolved:
vsock: prevent null-ptr-deref in vsock_*[has_data|has_space]
Recent reports have shown how we sometimes call vsock_*_has_data() when a vsock socket has been de-assigned from a transport (see attached links), but we shouldn't.
Previous commits should have solved the real problems, but we may have more in the future, so to avoid null-ptr-deref, we can return 0 (no space, no data available) but with a warning.
This way the code should continue to run in a nearly consistent state and have a warning that allows us to debug future problems.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
71cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 9 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=5.5,<5.15.177
- cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.13:rc7:*:*:*:*:*:*
- (no CPE)
- (no CPE)range: 5.5
- osv-coords61 versionspkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-debug&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-rt_debug&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-source-azure&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-source-rt&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-syms-azure&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-syms-rt&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2015.6pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6pkg:rpm/suse/kernel-coco_debug&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-coco&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-livepatch-MICRO-6-0-RT_Update_6&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-livepatch-MICRO-6-0-RT_Update_6&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-livepatch-MICRO-6-0_Update_6&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-livepatch-MICRO-6-0_Update_6&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-livepatch-SLE15-SP6-RT_Update_8&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/suse/kernel-livepatch-SLE15-SP6_Update_8&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-rt_debug&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6pkg:rpm/suse/kernel-source-coco&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6pkg:rpm/suse/kernel-syms-coco&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6
< 6.4.0-150600.23.38.1+ 60 more
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.8.31.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.23.38.1.150600.12.16.2
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.10.26.1
- (no CPE)range: < 6.4.0-150600.10.26.1
- (no CPE)range: < 6.4.0-150600.8.31.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.10.26.1
- (no CPE)range: < 6.4.0-150600.8.31.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.10.26.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.8.31.1
- (no CPE)range: < 6.4.0-15061.15.coco15sp6.1
- (no CPE)range: < 6.4.0-15061.15.coco15sp6.1
- (no CPE)range: < 6.4.0-150600.23.38.1.150600.12.16.2
- (no CPE)range: < 6.4.0-28.1.21.6
- (no CPE)range: < 6.4.0-28.1.21.6
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 1-3.1
- (no CPE)range: < 1-3.1
- (no CPE)range: < 1-3.1
- (no CPE)range: < 1-3.1
- (no CPE)range: < 1-150600.1.3.1
- (no CPE)range: < 1-150600.13.3.2
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.10.26.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-150600.10.26.1
- (no CPE)range: < 6.4.0-150600.8.31.1
- (no CPE)range: < 6.4.0-15061.15.coco15sp6.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-150600.10.26.1
- (no CPE)range: < 6.4.0-150600.8.31.1
- (no CPE)range: < 6.4.0-15061.15.coco15sp6.1
- (no CPE)range: < 6.4.0-150600.23.38.1
- (no CPE)range: < 6.4.0-150600.10.26.1
- (no CPE)range: < 6.4.0-150600.23.38.1
Patches
Vulnerability mechanics
References
9- git.kernel.org/stable/c/91751e248256efc111e52e15115840c35d85abafnvdPatch
- git.kernel.org/stable/c/9e5fed46ccd2c34c5fa5a9c8825ce4823fdc853envdPatch
- git.kernel.org/stable/c/b52e50dd4fabd12944172bd486a4f4853b7f74ddnvdPatch
- git.kernel.org/stable/c/bc9c49341f9728c31fe248c5fbba32d2e81a092bnvdPatch
- git.kernel.org/stable/c/c23d1d4f8efefb72258e9cedce29de10d057f8canvdPatch
- git.kernel.org/stable/c/daeac89cdb03d30028186f5ff7dc26ec8fa843e7nvdPatch
- cert-portal.siemens.com/productcert/html/ssa-265688.htmlnvd
- lists.debian.org/debian-lts-announce/2025/03/msg00001.htmlnvd
- lists.debian.org/debian-lts-announce/2025/03/msg00002.htmlnvd
News mentions
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