CVE-2026-46049
ALSA: ctxfi: Add fallback to default RSR for S/PDIF
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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: ALSA: ctxfi: Add fallback to default RSR for S/PDIF spdif_passthru_playback_get_resources() uses atc->pll_rate as the RSR for the MSR calculation loop. However, pll_rate is only updated in atc_pll_init() and not in hw_pll_init(), so it remains 0 after the card init. When spdif_passthru_playback_setup() skips atc_pll_init() for 32000 Hz, (rsr * desc.msr) always becomes 0, causing the loop to spin indefinitely. Add fallback to use atc->rsr when atc->pll_rate is 0. This reflects the hardware state, since hw_card_init() already configures the PLL to the default RSR.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
2.6.31
References 8
git.kernel.org
- stable/c/d0b53842211f73a10ea174100a213f7fa14b9f33
- stable/c/615b7a5e5d8be68d52f262579906f7e015ba4606
- stable/c/dfc00979ff00d9dfdfa1df32144a272ee2728102
- stable/c/25ded535ee261161bcf19dafd525c542e606559d
- stable/c/30f9494c6f2b53a78822cfb653ffbb1d092d44c8
- stable/c/09496158f6ebba8830593f8972035c02f97124c1
- stable/c/95b1ee8442cabbde83b2848e7c6100df90f3a00d
- stable/c/7d61662197ecdc458e33e475b6ada7f6da61d364