CVE-2025-21792
published 2025-02-27CVE-2025-21792: In the Linux kernel, the following vulnerability has been resolved: ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt If an AX25 device is…
PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.24%
14.7th percentile
In the Linux kernel, the following vulnerability has been resolved:
ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt
If an AX25 device is bound to a socket by setting the SO_BINDTODEVICE
socket option, a refcount leak will occur in ax25_release().
Commit 9fd75b66b8f6 ("ax25: Fix refcount leaks caused by ax25_cb_del()")
added decrement of device refcounts in ax25_release(). In order for that
to work correctly the refcounts must already be incremented when the
device is bound to the socket. An AX25 device can be bound to a socket
by either calling ax25_bind() or setting SO_BINDTODEVICE socket option.
In both cases the refcounts should be incremented, but in fact it is done
only in ax25_bind().
This bug leads to the following issue reported by Syzkaller:
refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 1 PID: 5932 at lib/refcount.c:31 refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31
Modules linked in:
CPU: 1 UID: 0 PID: 5932 Comm: syz-executor424 Not tainted 6.13.0-rc4-syzkaller-00110-g4099a71718b0 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31
Call Trace:
__refcount_dec include/linux/refcount.h:336 [inline]
refcount_dec include/linux/refcount.h:351 [inline]
ref_tracker_free+0x710/0x820 lib/ref_tracker.c:236
netdev_tracker_free include/linux/netdevice.h:4156 [inline]
netdev_put include/linux/netdevice.h:4173 [inline]
netdev_put include/linux/netdevice.h:4169 [inline]
ax25_release+0x33f/0xa10 net/ax25/af_ax25.c:1069
__sock_release+0xb0/0x270 net/socket.c:640
sock_close+0x1c/0x30 net/socket.c:1408
...
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
...
Fix the implementation of ax25_setsockopt() by adding increment of
refcounts for the new device bound, and decrement of refcounts for
the old unbound device.
Affected
40 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.129-1 (bookworm) | linux 6.1.129-1 (bookworm) |
| debian | linux-6.1 | < linux 6.1.129-1 (bookworm) | linux 6.1.129-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | >= 4.14.277 < 4.15 | 4.15 |
| linux | linux | >= 4.19.240 < 4.20 | 4.20 |
| linux | linux | >= 5.10.112 < 5.11 | 5.11 |
| linux | linux | >= 5.15.35 < 5.16 | 5.16 |
| linux | linux | >= 5.17.2 < 5.18 | 5.18 |
| linux | linux | >= 5.4.190 < 5.5 | 5.5 |
| linux | linux | >= 9fd75b66b8f68498454d685dc4ba13192ae069b0 < 90056ece99966182dc0e367f3fd2afab46ada847 | 90056ece99966182dc0e367f3fd2afab46ada847 |
| linux | linux | >= 9fd75b66b8f68498454d685dc4ba13192ae069b0 < 94a0de224ed52eb2ecd4f4cb1b937b674c9fb955 | 94a0de224ed52eb2ecd4f4cb1b937b674c9fb955 |
| linux | linux | >= 9fd75b66b8f68498454d685dc4ba13192ae069b0 < b58f7ca86a7b8e480c06e30c5163c5d2f4e24023 | b58f7ca86a7b8e480c06e30c5163c5d2f4e24023 |
| linux | linux | >= 9fd75b66b8f68498454d685dc4ba13192ae069b0 < 470bda72fda0fcf54300466d70ce2de62f7835d2 | 470bda72fda0fcf54300466d70ce2de62f7835d2 |
| linux | linux | >= 9fd75b66b8f68498454d685dc4ba13192ae069b0 < bca0902e61731a75fc4860c8720168d9f1bae3b6 | bca0902e61731a75fc4860c8720168d9f1bae3b6 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.1.129-1 | 6.1.129-1 |
| linux | linux_kernel | >= 0 < 6.12.16-1 | 6.12.16-1 |
| linux | linux_kernel | >= 0 < 6.12.16-1 | 6.12.16-1 |
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_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
vendor_ubuntu5.5MEDIUM
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CVE-2025-21792: In the Linux kernel, the following vulnerability has been resolved: ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt If an AX25 devic
osv·2025-02-27·CVSS 5.5
CVE-2025-21792 [MEDIUM] CVE-2025-21792: In the Linux kernel, the following vulnerability has been resolved: ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt If an AX25 devic
In the Linux kernel, the following vulnerability has been resolved: ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt If an AX25 device is bound to a socket by setting the SO_BINDTODEVICE socket option, a refcount leak will occur in ax25_release(). Commit 9fd75b66b8f6 ("ax25: Fix refcount leaks caused by ax25_cb_del()") added decrement of device refcounts in ax25_release(). In order for that to work correctly the refcounts must already be incremented when the device is bound to the socket. An AX25 device can be bound to a socket by either calling ax25_bind() or setting SO_BINDTODEVICE socket option. In both cases the refcounts should be incremented, but in fact it is done only in ax25_bind(). This bug leads to the following issue reported by Syzkaller: =====================
GHSA
GHSA-pw8p-q2m4-9ch4: In the Linux kernel, the following vulnerability has been resolved:
ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt
If an AX25 dev
ghsa_unreviewed·2025-02-27
CVE-2025-21792 [MEDIUM] GHSA-pw8p-q2m4-9ch4: In the Linux kernel, the following vulnerability has been resolved:
ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt
If an AX25 dev
In the Linux kernel, the following vulnerability has been resolved:
ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt
If an AX25 device is bound to a socket by setting the SO_BINDTODEVICE
socket option, a refcount leak will occur in ax25_release().
Commit 9fd75b66b8f6 ("ax25: Fix refcount leaks caused by ax25_cb_del()")
added decrement of device refcounts in ax25_release(). In order for that
to work correctly the refcounts must already be incremented when the
device is bound to the socket. An AX25 device can be bound to a socket
by either calling ax25_bind() or setting SO_BINDTODEVICE socket option.
In both cases the refcounts should be incremented, but in fact it is done
only in ax25_bind().
This bug leads to the following issue reported by Syzkaller:
refcount_t: decr
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CVE-2024-57977 Linux kernel vulnerabilities
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- 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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- EFI core;
- Qualcomm firmware drivers;
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- GPU 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:
- 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;
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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;
- 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;
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Red Hat
kernel: ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt
vendor_redhat·2025-02-27·CVSS 5.5
CVE-2025-21792 [MEDIUM] CWE-401 kernel: ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt
kernel: ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt
In the Linux kernel, the following vulnerability has been resolved:
ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt
If an AX25 device is bound to a socket by setting the SO_BINDTODEVICE
socket option, a refcount leak will occur in ax25_release().
Commit 9fd75b66b8f6 ("ax25: Fix refcount leaks caused by ax25_cb_del()")
added decrement of device refcounts in ax25_release(). In order for that
to work correctly the refcounts must already be incremented when the
device is bound to the socket. An AX25 device can be bound to a socket
by either calling ax25_bind() or setting SO_BINDTODEVICE socket option.
In both cases the refcounts should be incremented, but in fact it is done
only in ax25_bind().
This bu
Microsoft
ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt
vendor_msrc·2025-02-11·CVSS 5.5
CVE-2025-21792 [MEDIUM] ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt
ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt
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: htt
Debian
CVE-2025-21792: linux - In the Linux kernel, the following vulnerability has been resolved: ax25: Fix r...
vendor_debian·2025·CVSS 5.5
CVE-2025-21792 [MEDIUM] CVE-2025-21792: linux - In the Linux kernel, the following vulnerability has been resolved: ax25: Fix r...
In the Linux kernel, the following vulnerability has been resolved: ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt If an AX25 device is bound to a socket by setting the SO_BINDTODEVICE socket option, a refcount leak will occur in ax25_release(). Commit 9fd75b66b8f6 ("ax25: Fix refcount leaks caused by ax25_cb_del()") added decrement of device refcounts in ax25_release(). In order for that to work correctly the refcounts must already be incremented when the device is bound to the socket. An AX25 device can be bound to a socket by either calling ax25_bind() or setting SO_BINDTODEVICE socket option. In both cases the refcounts should be incremented, but in fact it is done only in ax25_bind(). This bug leads to the following issue reported by Syzkaller: =====================
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/470bda72fda0fcf54300466d70ce2de62f7835d2https://git.kernel.org/stable/c/90056ece99966182dc0e367f3fd2afab46ada847https://git.kernel.org/stable/c/94a0de224ed52eb2ecd4f4cb1b937b674c9fb955https://git.kernel.org/stable/c/b58f7ca86a7b8e480c06e30c5163c5d2f4e24023https://git.kernel.org/stable/c/bca0902e61731a75fc4860c8720168d9f1bae3b6https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
2025-02-27
Published