CVE-2024-26897: wifi: ath9k: delay all of ath9k_wmi_event_tasklet() until init is complete
Vulnerability summary
CVE-2024-26897 is a medium (CVSS 4.7) vulnerability in debian debian_linux. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.4% of scored vulnerabilities.
Not severe (CVSS 4.7, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 26 · Related 19Timeline
- 17-04-2024PublishedVulnerability first disclosed.
- 15-10-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: ath9k: delay all of ath9k_wmi_event_tasklet() until init is complete The ath9k_wmi_event_tasklet() used in ath9k_htc assumes that all the data structures have been fully initialised by the time it runs. However, because of the order in which things are initialised, this is not guaranteed to be the case, because the device is exposed to the USB subsystem before the ath9k driver initialisation is completed. We already committed a partial fix for this in commit: 8b3046abc99e ("ath9k_htc: fix NULL pointer dereference at ath9k_htc_tx_get_packet()") However, that commit only aborted the WMI_TXSTATUS_EVENTID command in the event tasklet, pairing it with an "initialisation complete" bit in the TX struct. It seems syzbot managed to trigger the race for one of the other commands as well, so let's just move the existing synchronisation bit to cover the whole tasklet (setting it at the end of ath9k_htc_probe_device() instead of inside ath9k_tx_init()).
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated4.7MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated4.7MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.19%
Chance of exploitation in the next 30 days
Percentile
8%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.19% 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 causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu105 products
- linux< 5.15.0-112.122 | < 6.8.0-35.35
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.15.0-1063.69 | < 6.8.0-1009.9
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 6.1.85-1 | < 6.7.12-1
- debian_linuxEOL10.0
Linux2 products
- linux≥ 78c8397132dd4735ac6a7b5a651302f0b9f264ad, < 1bc5461a21c56a36e2a7d81e152b90ce019a3905 | ≥ 735aefae7b68025cd04c482a940c0f6fc6797a63, < f8ff4b4df71e87f609be0cc37d92e918107f9b90 | ≥ 8b3046abc99eefe11438090bcc4ec3a3994b55d0, < 74d0639261dd795dce958d1b14815bdcbb48a715 | ≥ 8b3046abc99eefe11438090bcc4ec3a3994b55d0, < a015fbf698c8957aa5fbeefc5c59dd2cf3107298 | ≥ 8b3046abc99eefe11438090bcc4ec3a3994b55d0, < ac90e22e735bac44f74b5161fb096fbeb0ff8bc2 | ≥ 8b3046abc99eefe11438090bcc4ec3a3994b55d0, < 4afa0246656d5680c8a4c3fb37ba6570c4ab819b | ≥ 8b3046abc99eefe11438090bcc4ec3a3994b55d0, < 24355fcb0d4cbcb6ddda262596558e8cfba70f11 | 7bbc1a50a7963f14048f0e54b0b73159f86d4ea3 | ≥ 5.10.136, < 5.10.214 | ≥ 5.15.17, < 5.15.153 | ≥ 5.16.3, < 5.17 | 5.17
- linux_kernel≥ 5.10.136, < 5.10.214 | ≥ 5.15.17, < 5.15.153 | ≥ 5.16.3, < 6.1.83 | ≥ 6.2, < 6.6.23 | ≥ 6.7, < 6.7.11 | ≥ 6.8, < 6.8.2
3 vendors · 109 products
