CVE-2025-21759
published 2025-02-27CVE-2025-21759: In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: extend RCU protection in igmp6_send() igmp6_send() can be called without RTNL…
PriorityP345high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
7.17%
93.6th percentile
In the Linux kernel, the following vulnerability has been resolved:
ipv6: mcast: extend RCU protection in igmp6_send()
igmp6_send() can be called without RTNL or RCU being held.
Extend RCU protection so that we can safely fetch the net pointer
and avoid a potential UAF.
Note that we no longer can use sock_alloc_send_skb() because
ipv6.igmp_sk uses GFP_KERNEL allocations which can sleep.
Instead use alloc_skb() and charge the net->ipv6.igmp_sk
socket under RCU protection.
Affected
18 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.12.16-1 (forky) | linux 6.12.16-1 (forky) |
| linux | linux | — | — |
| linux | linux | >= b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 < 81b25a07ebf53f9ef4ca8f3d96a8ddb94561dd5a | 81b25a07ebf53f9ef4ca8f3d96a8ddb94561dd5a |
| linux | linux | >= b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 < 0bf8e2f3768629d437a32cb824149e6e98254381 | 0bf8e2f3768629d437a32cb824149e6e98254381 |
| linux | linux | >= b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 < 8e92d6a413feaf968a33f0b439ecf27404407458 | 8e92d6a413feaf968a33f0b439ecf27404407458 |
| linux | linux | >= b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 < 087c1faa594fa07a66933d750c0b2610aa1a2946 | 087c1faa594fa07a66933d750c0b2610aa1a2946 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.12.16-1 | 6.12.16-1 |
| linux | linux_kernel | >= 0 < 6.12.16-1 | 6.12.16-1 |
| linux | linux_kernel | >= 0 < 6.8.0-78.78 | 6.8.0-78.78 |
| linux | linux_kernel | >= 2.6.26 < 6.6.79 | 6.6.79 |
| linux | linux_kernel | >= 6.13 < 6.13.4 | 6.13.4 |
| linux | linux_kernel | >= 6.7 < 6.12.16 | 6.12.16 |
| msrc | azl3_kernel_6.6.78.1-3_on_azure_linux_3.0 | — | — |
| msrc | azl3_kernel_6.6.82.1-1_on_azure_linux_3.0 | — | — |
| msrc | cbl2_kernel_5.15.186.1-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_kernel_5.15.200.1-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_kernel_5.15.202.1-1_on_cbl_mariner_2.0 | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_msrc7.8HIGH
vendor_redhat7.8HIGH
vendor_ubuntu5.5MEDIUM
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- GPIO subsystem;
- GPU drivers;
- HID subsystem;
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- Multiple devices driver;
- Media drivers;
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- PCI subsystem;
- S/390 drivers;
- SPI subsystem;
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- GPU drivers;
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- Input Device (Mouse) drivers;
- Multiple devices driver;
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- Serial ATA and Parallel ATA drivers;
- Drivers core;
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- Character device driver;
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An attacker could possibly use these to compromise the system.
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- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Bluetooth drivers;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Hardware crypto device drivers;
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- GPIO subsystem;
- GPU drivers;
- HID subsystem;
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GHSA
GHSA-pvj3-f5v8-hgxh: In the Linux kernel, the following vulnerability has been resolved:
ipv6: mcast: extend RCU protection in igmp6_send()
igmp6_send() can be called wi
ghsa_unreviewed·2025-02-27
CVE-2025-21759 [HIGH] CWE-416 GHSA-pvj3-f5v8-hgxh: In the Linux kernel, the following vulnerability has been resolved:
ipv6: mcast: extend RCU protection in igmp6_send()
igmp6_send() can be called wi
In the Linux kernel, the following vulnerability has been resolved:
ipv6: mcast: extend RCU protection in igmp6_send()
igmp6_send() can be called without RTNL or RCU being held.
Extend RCU protection so that we can safely fetch the net pointer
and avoid a potential UAF.
Note that we no longer can use sock_alloc_send_skb() because
ipv6.igmp_sk uses GFP_KERNEL allocations which can sleep.
Instead use alloc_skb() and charge the net->ipv6.igmp_sk
socket under RCU protection.
OSV
CVE-2025-21759: In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: extend RCU protection in igmp6_send() igmp6_send() can be called with
osv·2025-02-27·CVSS 7.8
CVE-2025-21759 [HIGH] CVE-2025-21759: In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: extend RCU protection in igmp6_send() igmp6_send() can be called with
In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: extend RCU protection in igmp6_send() igmp6_send() can be called without RTNL or RCU being held. Extend RCU protection so that we can safely fetch the net pointer and avoid a potential UAF. Note that we no longer can use sock_alloc_send_skb() because ipv6.igmp_sk uses GFP_KERNEL allocations which can sleep. Instead use alloc_skb() and charge the net->ipv6.igmp_sk socket under RCU protection.
Ubuntu
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vendor_ubuntu·2025-09-03
CVE-2025-21741 Linux kernel (Azure) vulnerabilities
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Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- S390 architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- FireWire subsystem;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I3C subsystem;
- InfiniBand drivers;
- Input Device (Mouse) drivers;
- IOMMU subsystem;
- Multiple devices driver;
- Media drivers;
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Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Input Device (Mouse) drivers;
- Multiple devices driver;
- Media drivers;
- Network drivers;
- PCI subsystem;
- S/390 drivers;
- SPI subsystem;
- Trusted Execution Environment drivers;
- UFS subsystem;
- USB Device Class drivers;
- USB core drivers;
- USB Gadget drivers;
- Framebuffer layer;
- Network file system (NFS) client;
- Network file system (NFS) server daemon;
-
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An attacker could possibly use these to compromise the system.
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- Block layer subsystem;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Input Device (Mouse) drivers;
- Multiple devices driver;
- Media drivers;
- Network drivers;
- PCI subsystem;
- S/390 drivers;
- SPI subsystem;
- Trusted Execution Environment drivers;
- UFS subsystem;
- USB Device Class drivers;
- USB core drivers;
- USB Gadget drivers;
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Summary: Several security issues were fixed in the Linux kernel.
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
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- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Input Device (Mouse) drivers;
- Multiple devices driver;
- Media drivers;
- Network drivers;
- PCI subsystem;
- S/390 drivers;
- SPI subsystem;
- Trusted Execution Environment drivers;
- UFS subsystem;
- USB Device Class drivers;
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- USB Gadget drivers;
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Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Input Device (Mouse) drivers;
- Multiple devices driver;
- Media drivers;
- Network drivers;
- PCI subsystem;
- S/390 drivers;
- SPI subsystem;
- Trusted Execution Environment drivers;
- UFS subsystem;
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- USB Gadget drivers;
- Framebuffer layer;
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CVE-2025-21859 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Input Device (Mouse) drivers;
- Multiple devices driver;
- Media drivers;
- Network drivers;
- PCI subsystem;
- S/390 drivers;
- SPI subsystem;
- Trusted Execution Environment drivers;
- UFS subsystem;
- USB Device Class drivers;
- USB core drivers;
- USB Gadget drivers;
- Framebuffer layer;
- Network file system (NFS) client;
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Bluetooth drivers;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Hardware crypto device drivers;
- FireWire subsystem;
- EFI core;
- Qualcomm firmware drivers;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
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- I3C subsystem;
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Ubuntu
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Title: Linux kernel (AWS) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Bluetooth drivers;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Hardware crypto device drivers;
- FireWire subsystem;
- EFI core;
- Qualcomm firmware drivers;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- I3C subsystem;
- InfiniBand drivers;
- Input Device (Mouse) drivers;
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2025-05-20
CVE-2025-21716 Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Bluetooth drivers;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Hardware crypto device drivers;
- FireWire subsystem;
- EFI core;
- Qualcomm firmware drivers;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- I3C subsystem;
- InfiniBand drivers;
- Input Device (Mouse) drivers;
- IOM
Red Hat
kernel: ipv6: mcast: extend RCU protection in igmp6_send()
vendor_redhat·2025-02-27·CVSS 7.8
CVE-2025-21759 [HIGH] CWE-416 kernel: ipv6: mcast: extend RCU protection in igmp6_send()
kernel: ipv6: mcast: extend RCU protection in igmp6_send()
In the Linux kernel, the following vulnerability has been resolved:
ipv6: mcast: extend RCU protection in igmp6_send()
igmp6_send() can be called without RTNL or RCU being held.
Extend RCU protection so that we can safely fetch the net pointer
and avoid a potential UAF.
Note that we no longer can use sock_alloc_send_skb() because
ipv6.igmp_sk uses GFP_KERNEL allocations which can sleep.
Instead use alloc_skb() and charge the net->ipv6.igmp_sk
socket under RCU protection.
Statement: The patch extends RCU protection in igmp6_send() to prevent a potential use-after-free (UAF) when accessing net->ipv6.igmp_sk. This function could be invoked without holding RTNL or RCU, making concurrent access unsafe in network namespace contexts. Th
Microsoft
ipv6: mcast: extend RCU protection in igmp6_send()
vendor_msrc·2025-02-11·CVSS 7.8
CVE-2025-21759 [HIGH] CWE-416 ipv6: mcast: extend RCU protection in igmp6_send()
ipv6: mcast: extend RCU protection in igmp6_send()
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
Linux: Linux
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.micr
Debian
CVE-2025-21759: linux - In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast...
vendor_debian·2025·CVSS 7.8
CVE-2025-21759 [HIGH] CVE-2025-21759: linux - In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast...
In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: extend RCU protection in igmp6_send() igmp6_send() can be called without RTNL or RCU being held. Extend RCU protection so that we can safely fetch the net pointer and avoid a potential UAF. Note that we no longer can use sock_alloc_send_skb() because ipv6.igmp_sk uses GFP_KERNEL allocations which can sleep. Instead use alloc_skb() and charge the net->ipv6.igmp_sk socket under RCU protection.
Scope: local
bookworm: open
bullseye: open
forky: resolved (fixed in 6.12.16-1)
sid: resolved (fixed in 6.12.16-1)
trixie: resolved (fixed in 6.12.16-1)
Suricata
ET WEB_SPECIFIC_APPS BMC FootPrints RSS feedUrl parameter SSRF (CVE-2025-71259)
suricata·2026-03-18·CVSS 5.3
CVE-2025-71259 [MEDIUM] ET WEB_SPECIFIC_APPS BMC FootPrints RSS feedUrl parameter SSRF (CVE-2025-71259)
ET WEB_SPECIFIC_APPS BMC FootPrints RSS feedUrl parameter SSRF (CVE-2025-71259)
Rule: alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS BMC FootPrints RSS feedUrl parameter SSRF (CVE-2025-71259)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/footprints/servicedesk/externalfeed/RSS|3f|feedUrl|3d|http"; startswith; fast_pattern; http.cookie; content:"SEC_TOKEN|3d|"; startswith; reference:url,labs.watchtowr.com/thanks-itsms-threat-actors-have-never-been-so-organized-bmc-footprints-pre-auth-remote-code-execution-chains/; reference:cve,2025-71259; reference:cve,2025-21759; classtype:attempted-admin; sid:2068319; rev:1; metadata:affected_product BMC_FootPrints, attack_target Server, tls_state TLSDecrypt, created_at 2026_03_18, cve CVE_2025_21759, depl
No public exploits indexed.
2025-02-27
Published