CVE-2025-38617

net/packet: fix a race in packet_set_ring() and packet_notifier()

State: Published
Severity: 7.8 High
Published: Aug 22, 2025
Updated: Oct 15, 2026
Reserved: Apr 16, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

net/packet: fix a race in packet_set_ring() and packet_notifier()

When packet_set_ring() releases po->bind_lock, another thread can run packet_notifier() and process an NETDEV_UP event.

This race and the fix are both similar to that of commit 15fe076edea7 ("net/packet: fix a race in packet_bind() and packet_notifier()").

There too the packet_notifier NETDEV_UP event managed to run while a po->bind_lock critical section had to be temporarily released. And the fix was similarly to temporarily set po->num to zero to keep the socket unhooked until the lock is retaken.

The po->bind_lock in packet_set_ring and packet_notifier precede the introduction of git history.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 18f13f2a83eb81be349a9757ba2141ff1da9ad73Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 7da733f117533e9b2ebbd530a22ae4028713955cAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before ba2257034755ae773722f15f4c3ad1dcdad15ca9Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 7de07705007c7e34995a5599aaab1d23e762d7caAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 88caf46db8239e6471413d28aabaa6b8bd552805Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before f2e8fcfd2b1bc754920108b7f2cd75082c5a18dfAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e50ccfaca9e3c671cae917dcb994831a859cf588Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before f1791fd7b845bea0ce9674fcf2febee7bc87a893Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 01d3c8417b9c1b884a8a981a3b886da556512f36Affected
LinuxLinux	2.6.12Affected before 2.6.12Not affected 5.4.297 through 5.4.Not affected 5.10.241 through 5.10.Not affected 5.15.190 through 5.15.Not affected 6.1.148 through 6.1.Not affected 6.6.102 through 6.6.Not affected 6.12.42 through 6.12.Not affected 6.15.10 through 6.15.Not affected 6.16.1 through 6.16.Not affected 6.17 and laterNot affected

Product

Versions

LinuxLinux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 18f13f2a83eb81be349a9757ba2141ff1da9ad73Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 7da733f117533e9b2ebbd530a22ae4028713955cAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before ba2257034755ae773722f15f4c3ad1dcdad15ca9Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 7de07705007c7e34995a5599aaab1d23e762d7caAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 88caf46db8239e6471413d28aabaa6b8bd552805Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before f2e8fcfd2b1bc754920108b7f2cd75082c5a18dfAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e50ccfaca9e3c671cae917dcb994831a859cf588Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before f1791fd7b845bea0ce9674fcf2febee7bc87a893Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 01d3c8417b9c1b884a8a981a3b886da556512f36Affected

LinuxLinux

2.6.12Affected
before 2.6.12Not affected
5.4.297 through 5.4.*Not affected
5.10.241 through 5.10.*Not affected
5.15.190 through 5.15.*Not affected
6.1.148 through 6.1.*Not affected
6.6.102 through 6.6.*Not affected
6.12.42 through 6.12.*Not affected
6.15.10 through 6.15.*Not affected
6.16.1 through 6.16.*Not affected
6.17 and laterNot affected

References

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