CVE-2022-50740: wifi: ath9k: hif_usb: fix memory leak of urbs in ath9k_hif_usb_dealloc_tx_urbs()
Vulnerability summary
CVE-2022-50740 is a medium (CVSS 5.1) vulnerability in linux. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 20.9% of scored vulnerabilities.
Not severe (CVSS 5.1, physical access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 7 · Related 5Timeline
- 24-12-2025PublishedVulnerability first disclosed.
- 23-05-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
0.28%
Chance of exploitation in the next 30 days
Percentile
21%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.28% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: physical access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu121 products
- linuxAll versions (No fix recorded) | < 4.15.0-208.220 | < 5.4.0-144.161 | < 5.15.0-69.76
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 4.15.0-1153.166 | < 5.4.0-1097.105 | < 5.15.0-1033.37
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian1 product
- linux< 6.1.4-1
Linux1 product
- linux≥ 6f0706ef39fecc6bf56d67728fe0c94e26b43e9d, < 134ae5eba41294eff76e4be20d6001b8f0192207 | ≥ 795d57a558d106b8a5bc2bd7aeaf707d9a099244, < 472312fef2b9eccaa03bd59e0ab2527da945e736 | ≥ df4318440c1568b7dedc5f7d4e617d0e297a1313, < eddbb8f7620f9f8008b090a6e10c460074ca575a | ≥ a9990ed2d7ca9339d37c7f67d6f5cb298c3f1b34, < 9850791d389b342ae6e573fe8198db0b4d338352 | ≥ 03fb92a432ea5abe5909bca1455b7e44a9380480, < c3fb3e9a2c0c1a0fa492d90eb19bcfa92a5f884d | ≥ 03fb92a432ea5abe5909bca1455b7e44a9380480, < d856f7574bcc1d81de565a857caf32f122cd7ce0 | ≥ 03fb92a432ea5abe5909bca1455b7e44a9380480, < c05189a429fdb371dd455c3c466d67ac2ebff152 | ≥ 03fb92a432ea5abe5909bca1455b7e44a9380480, < 08aa0537ec8cf29ceccae98acc1a534fc12598c1 | ≥ 03fb92a432ea5abe5909bca1455b7e44a9380480, < c2a94de38c74e86f49124ac14f093d6a5c377a90 | b92e116ae36f498858dbb18e29a066c3f5348965 | 7f5972267295fe49f8da8eb42bc2eb3d140860c0 | 2d72d5ce63c92f56b9f978e8befb5838144176b9 | ≥ 4.9.241, < 4.9.337 | ≥ 4.14.203, < 4.14.303 | ≥ 4.19.154, < 4.19.270 | ≥ 5.4.73, < 5.4.229 | ≥ 4.4.241, < 4.5 | ≥ 5.8.17, < 5.9 | ≥ 5.9.2, < 5.10 | 5.10
3 vendors · 123 products
