wifi: rtlwifi: pci: fix possible use-after-free caused by unfinished irq_prepare_bcn_tasklet
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: rtlwifi: pci: fix possible use-after-free caused by unfinished irq_prepare_bcn_tasklet The irq_prepare_bcn_tasklet is initialized in rtl_pci_init() and scheduled when RTL_IMR_BCNINT interrupt is triggered by hardware. But it is never killed in rtl_pci_deinit(). When the rtlwifi card probe fails or is being detached, the ieee80211_hw is deallocated. However, irq_prepare_bcn_tasklet may still be running or pending, leading to use-after-free when the freed ieee80211_hw is accessed in _rtl_pci_prepare_bcn_tasklet(). Similar to irq_tasklet, add tasklet_kill() in rtl_pci_deinit() to ensure that irq_prepare_bcn_tasklet is properly terminated before the ieee80211_hw is released. The issue was identified through static analysis.
Timeline
- CVE published
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
2.6.38
References 8
git.kernel.org
- stable/c/ae10d4a1ab6bcaa1336abb171908a9a365761d3e
- stable/c/fac1079e0fdec6df6d7562c21941587236dc3def
- stable/c/e40873820c9d245ce482faa7ad514ebdb3b8d23d
- stable/c/008c456b76e9070979bc0e763897a5d3b0fdd4dc
- stable/c/7731b67bd59d1284d150cbe40a47e95a10613234
- stable/c/aa10a452e34810987fb9f4a047995b30003fb53f
- stable/c/3c0e8a3179e6325a7dc6ce221aef0e03d854ab4b
- stable/c/039cd522dc70151da13329a5e3ae19b1736f468a