CVE-2022-50740

wifi: ath9k: hif_usb: fix memory leak of urbs in ath9k_hif_usb_dealloc_tx_urbs()

State: Published
Severity: Not scored
Published: Dec 24, 2025
Updated: May 23, 2026
Reserved: Dec 24, 2025

Description

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

wifi: ath9k: hif_usb: fix memory leak of urbs in ath9k_hif_usb_dealloc_tx_urbs()

Syzkaller reports a long-known leak of urbs in ath9k_hif_usb_dealloc_tx_urbs().

The cause of the leak is that usb_get_urb() is called but usb_free_urb() (or usb_put_urb()) is not called inside usb_kill_urb() as urb->dev or urb->ep fields have not been initialized and usb_kill_urb() returns immediately.

The patch removes trying to kill urbs located in hif_dev->tx.tx_buf because hif_dev->tx.tx_buf is not supposed to contain urbs which are in pending state (the pending urbs are stored in hif_dev->tx.tx_pending). The tx.tx_lock is acquired so there should not be any changes in the list.

Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	6f0706ef39fecc6bf56d67728fe0c94e26b43e9d to before 134ae5eba41294eff76e4be20d6001b8f0192207Affected 795d57a558d106b8a5bc2bd7aeaf707d9a099244 to before 472312fef2b9eccaa03bd59e0ab2527da945e736Affected df4318440c1568b7dedc5f7d4e617d0e297a1313 to before eddbb8f7620f9f8008b090a6e10c460074ca575aAffected a9990ed2d7ca9339d37c7f67d6f5cb298c3f1b34 to before 9850791d389b342ae6e573fe8198db0b4d338352Affected 03fb92a432ea5abe5909bca1455b7e44a9380480 to before c3fb3e9a2c0c1a0fa492d90eb19bcfa92a5f884dAffected 03fb92a432ea5abe5909bca1455b7e44a9380480 to before d856f7574bcc1d81de565a857caf32f122cd7ce0Affected 03fb92a432ea5abe5909bca1455b7e44a9380480 to before c05189a429fdb371dd455c3c466d67ac2ebff152Affected 03fb92a432ea5abe5909bca1455b7e44a9380480 to before 08aa0537ec8cf29ceccae98acc1a534fc12598c1Affected 03fb92a432ea5abe5909bca1455b7e44a9380480 to before c2a94de38c74e86f49124ac14f093d6a5c377a90Affected b92e116ae36f498858dbb18e29a066c3f5348965Affected 7f5972267295fe49f8da8eb42bc2eb3d140860c0Affected 2d72d5ce63c92f56b9f978e8befb5838144176b9Affected 4.9.241 to before 4.9.337Affected 4.14.203 to before 4.14.303Affected 4.19.154 to before 4.19.270Affected 5.4.73 to before 5.4.229Affected 4.4.241 to before 4.5Affected 5.8.17 to before 5.9Affected 5.9.2 to before 5.10Affected
LinuxLinux	5.10Affected before 5.10Not affected 4.9.337 through 4.9.Not affected 4.14.303 through 4.14.Not affected 4.19.270 through 4.19.Not affected 5.4.229 through 5.4.Not affected 5.10.163 through 5.10.Not affected 5.15.86 through 5.15.Not affected 6.0.16 through 6.0.Not affected 6.1.2 through 6.1.Not affected 6.2 and laterNot affected

Product

Versions

LinuxLinux

6f0706ef39fecc6bf56d67728fe0c94e26b43e9d to before 134ae5eba41294eff76e4be20d6001b8f0192207Affected
795d57a558d106b8a5bc2bd7aeaf707d9a099244 to before 472312fef2b9eccaa03bd59e0ab2527da945e736Affected
df4318440c1568b7dedc5f7d4e617d0e297a1313 to before eddbb8f7620f9f8008b090a6e10c460074ca575aAffected
a9990ed2d7ca9339d37c7f67d6f5cb298c3f1b34 to before 9850791d389b342ae6e573fe8198db0b4d338352Affected
03fb92a432ea5abe5909bca1455b7e44a9380480 to before c3fb3e9a2c0c1a0fa492d90eb19bcfa92a5f884dAffected
03fb92a432ea5abe5909bca1455b7e44a9380480 to before d856f7574bcc1d81de565a857caf32f122cd7ce0Affected
03fb92a432ea5abe5909bca1455b7e44a9380480 to before c05189a429fdb371dd455c3c466d67ac2ebff152Affected
03fb92a432ea5abe5909bca1455b7e44a9380480 to before 08aa0537ec8cf29ceccae98acc1a534fc12598c1Affected
03fb92a432ea5abe5909bca1455b7e44a9380480 to before c2a94de38c74e86f49124ac14f093d6a5c377a90Affected
b92e116ae36f498858dbb18e29a066c3f5348965Affected
7f5972267295fe49f8da8eb42bc2eb3d140860c0Affected
2d72d5ce63c92f56b9f978e8befb5838144176b9Affected
4.9.241 to before 4.9.337Affected
4.14.203 to before 4.14.303Affected
4.19.154 to before 4.19.270Affected
5.4.73 to before 5.4.229Affected
4.4.241 to before 4.5Affected
5.8.17 to before 5.9Affected
5.9.2 to before 5.10Affected

LinuxLinux

5.10Affected
before 5.10Not affected
4.9.337 through 4.9.*Not affected
4.14.303 through 4.14.*Not affected
4.19.270 through 4.19.*Not affected
5.4.229 through 5.4.*Not affected
5.10.163 through 5.10.*Not affected
5.15.86 through 5.15.*Not affected
6.0.16 through 6.0.*Not affected
6.1.2 through 6.1.*Not affected
6.2 and laterNot affected

References

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