CVE-2025-39926
published 2025-10-01CVE-2025-39926: In the Linux kernel, the following vulnerability has been resolved: genetlink: fix genl_bind() invoking bind() after -EPERM Per family bind/unbind callbacks…
PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.13%
3.3th percentile
In the Linux kernel, the following vulnerability has been resolved:
genetlink: fix genl_bind() invoking bind() after -EPERM
Per family bind/unbind callbacks were introduced to allow families
to track multicast group consumer presence, e.g. to start or stop
producing events depending on listeners.
However, in genl_bind() the bind() callback was invoked even if
capability checks failed and ret was set to -EPERM. This means that
callbacks could run on behalf of unauthorized callers while the
syscall still returned failure to user space.
Fix this by only invoking bind() after "if (ret) break;" check
i.e. after permission checks have succeeded.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.16.8-1 (forky) | linux 6.16.8-1 (forky) |
| linux | linux | — | — |
| linux | linux | >= 3de21a8990d3c2cc507e9cc4ed00f36358d5b93e < 98c9d884047a3051c203708914a874dece3cbe54 | 98c9d884047a3051c203708914a874dece3cbe54 |
| linux | linux | >= 3de21a8990d3c2cc507e9cc4ed00f36358d5b93e < 8858c1e9405906c09589d7c336f04058ea198207 | 8858c1e9405906c09589d7c336f04058ea198207 |
| linux | linux | >= 3de21a8990d3c2cc507e9cc4ed00f36358d5b93e < 1dbfb0363224f6da56f6655d596dc5097308d6f5 | 1dbfb0363224f6da56f6655d596dc5097308d6f5 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.12.48-1 | 6.12.48-1 |
| linux | linux_kernel | >= 0 < 6.16.8-1 | 6.16.8-1 |
| linux | linux_kernel | >= 6.13 < 6.16.8 | 6.16.8 |
| linux | linux_kernel | >= 6.9 < 6.12.48 | 6.12.48 |
| msrc | cbl2_wireshark_3.4.14-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_msrc7.5HIGH
vendor_debian5.5LOW
vendor_redhat5.5MEDIUM
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GHSA
GHSA-f9wm-ppg2-pc92: In the Linux kernel, the following vulnerability has been resolved:
genetlink: fix genl_bind() invoking bind() after -EPERM
Per family bind/unbind c
ghsa_unreviewed·2025-10-01
CVE-2025-39926 [MEDIUM] GHSA-f9wm-ppg2-pc92: In the Linux kernel, the following vulnerability has been resolved:
genetlink: fix genl_bind() invoking bind() after -EPERM
Per family bind/unbind c
In the Linux kernel, the following vulnerability has been resolved:
genetlink: fix genl_bind() invoking bind() after -EPERM
Per family bind/unbind callbacks were introduced to allow families
to track multicast group consumer presence, e.g. to start or stop
producing events depending on listeners.
However, in genl_bind() the bind() callback was invoked even if
capability checks failed and ret was set to -EPERM. This means that
callbacks could run on behalf of unauthorized callers while the
syscall still returned failure to user space.
Fix this by only invoking bind() after "if (ret) break;" check
i.e. after permission checks have succeeded.
OSV
CVE-2025-39926: In the Linux kernel, the following vulnerability has been resolved: genetlink: fix genl_bind() invoking bind() after -EPERM Per family bind/unbind cal
osv·2025-10-01·CVSS 5.5
CVE-2025-39926 [MEDIUM] CVE-2025-39926: In the Linux kernel, the following vulnerability has been resolved: genetlink: fix genl_bind() invoking bind() after -EPERM Per family bind/unbind cal
In the Linux kernel, the following vulnerability has been resolved: genetlink: fix genl_bind() invoking bind() after -EPERM Per family bind/unbind callbacks were introduced to allow families to track multicast group consumer presence, e.g. to start or stop producing events depending on listeners. However, in genl_bind() the bind() callback was invoked even if capability checks failed and ret was set to -EPERM. This means that callbacks could run on behalf of unauthorized callers while the syscall still returned failure to user space. Fix this by only invoking bind() after "if (ret) break;" check i.e. after permission checks have succeeded.
Red Hat
kernel: Linux kernel: Denial of Service due to improper permission checks in genl_bind()
vendor_redhat·2025-10-01·CVSS 5.5
CVE-2025-39926 [MEDIUM] CWE-266 kernel: Linux kernel: Denial of Service due to improper permission checks in genl_bind()
kernel: Linux kernel: Denial of Service due to improper permission checks in genl_bind()
In the Linux kernel, the following vulnerability has been resolved:
genetlink: fix genl_bind() invoking bind() after -EPERM
Per family bind/unbind callbacks were introduced to allow families
to track multicast group consumer presence, e.g. to start or stop
producing events depending on listeners.
However, in genl_bind() the bind() callback was invoked even if
capability checks failed and ret was set to -EPERM. This means that
callbacks could run on behalf of unauthorized callers while the
syscall still returned failure to user space.
Fix this by only invoking bind() after "if (ret) break;" check
i.e. after permission checks have succeeded.
A flaw was found in the Linux kernel’s genetlink subsystem. T
Debian
CVE-2025-39926: linux - In the Linux kernel, the following vulnerability has been resolved: genetlink: ...
vendor_debian·2025·CVSS 5.5
CVE-2025-39926 [MEDIUM] CVE-2025-39926: linux - In the Linux kernel, the following vulnerability has been resolved: genetlink: ...
In the Linux kernel, the following vulnerability has been resolved: genetlink: fix genl_bind() invoking bind() after -EPERM Per family bind/unbind callbacks were introduced to allow families to track multicast group consumer presence, e.g. to start or stop producing events depending on listeners. However, in genl_bind() the bind() callback was invoked even if capability checks failed and ret was set to -EPERM. This means that callbacks could run on behalf of unauthorized callers while the syscall still returned failure to user space. Fix this by only invoking bind() after "if (ret) break;" check i.e. after permission checks have succeeded.
Scope: local
bookworm: resolved
bullseye: resolved
forky: resolved (fixed in 6.16.8-1)
sid: resolved (fixed in 6.16.8-1)
trixie: resolved (fixed in 6.12
Microsoft
Buffer overflow in the Bluetooth HCI_ISO dissector in Wireshark 3.4.0 to 3.4.9 allows denial of service via packet injection or crafted capture file
vendor_msrc·2021-11-09·CVSS 7.5
CVE-2021-39926 [HIGH] CWE-120 Buffer overflow in the Bluetooth HCI_ISO dissector in Wireshark 3.4.0 to 3.4.9 allows denial of service via packet injection or crafted capture file
Buffer overflow in the Bluetooth HCI_ISO dissector in Wireshark 3.4.0 to 3.4.9 allows denial of service via packet injection or crafted capture file
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
GitLab: Git
No detection rules found.
No public exploits indexed.
2025-10-01
Published