CVE-2026-46049— ALSA: ctxfi: Add fallback to default RSR for S/PDIF
Possible ATT&CK Techniques 1AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 8cc72361481f00253f1e468ade5795427386d593< d0b53842211f73a10ea174100a213f7fa14b9f33 | affected |
8cc72361481f00253f1e468ade5795427386d593< 615b7a5e5d8be68d52f262579906f7e015ba4606 | affected | ||
8cc72361481f00253f1e468ade5795427386d593< dfc00979ff00d9dfdfa1df32144a272ee2728102 | affected | ||
8cc72361481f00253f1e468ade5795427386d593< 25ded535ee261161bcf19dafd525c542e606559d | affected | ||
8cc72361481f00253f1e468ade5795427386d593< 30f9494c6f2b53a78822cfb653ffbb1d092d44c8 | affected | ||
8cc72361481f00253f1e468ade5795427386d593< 09496158f6ebba8830593f8972035c02f97124c1 | affected | ||
8cc72361481f00253f1e468ade5795427386d593< 95b1ee8442cabbde83b2848e7c6100df90f3a00d | affected | ||
8cc72361481f00253f1e468ade5795427386d593< 7d61662197ecdc458e33e475b6ada7f6da61d364 | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2026-46049
Vulnerability Information
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Vulnerability Title
ALSA: ctxfi: Add fallback to default RSR for S/PDIF
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ALSA ctxfi驱动中pll_rate未初始化，可能导致S/PDIF播放时无限循环。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-46049
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-46049 (8)
Same Patch Batch · Linux · 2026-05-27 · 276 CVEs total
| CVE-2026-45898 | 9.8 CRITICAL | RDMA/iwcm: Fix workqueue list corruption by removing work_list |
| CVE-2026-45972 | 9.8 CRITICAL | smb: client: fix potential UAF and double free in smb2_open_file() |
| CVE-2026-46039 | 9.8 CRITICAL | rxgk: Fix potential integer overflow in length check |
| CVE-2026-45988 | 9.8 CRITICAL | rxrpc: Fix re-decryption of RESPONSE packets |
| CVE-2026-46043 | 9.1 CRITICAL | RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv |
| CVE-2026-45945 | 8.8 HIGH | iommu/vt-d: Fix race condition during PASID entry replacement |
| CVE-2026-46056 | 8.8 HIGH | Bluetooth: hci_event: fix potential UAF in SSP passkey handlers |
| CVE-2026-46037 | 8.2 HIGH | ipv4: icmp: validate reply type before using icmp_pointers |
| CVE-2026-45843 | 8.2 HIGH | slip: bound decode() reads against the compressed packet length |
| CVE-2026-46099 | 8.1 HIGH | net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels |
| CVE-2026-46010 | 8.1 HIGH | rxrpc: Fix error handling in rxgk_extract_token() |
| CVE-2026-46076 | 7.9 HIGH | KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1 |
| CVE-2026-45852 | 7.8 HIGH | RDMA/rxe: Fix double free in rxe_srq_from_init |
| CVE-2026-45970 | 7.8 HIGH | bonding: alb: fix UAF in rlb_arp_recv during bond up/down |
| CVE-2026-46006 | 7.8 HIGH | drm/nouveau: fix u32 overflow in pushbuf reloc bounds check |
| CVE-2026-45878 | 7.8 HIGH | drm/amdkfd: Fix watch_id bounds checking in debug address watch v2 |
| CVE-2026-45942 | 7.8 HIGH | ext4: fix e4b bitmap inconsistency reports |
| CVE-2026-45931 | 7.8 HIGH | accel/amdxdna: Hold mm structure across iommu_sva_unbind_device() |
| CVE-2026-45984 | 7.8 HIGH | gfs2: Fix use-after-free in iomap inline data write path |
| CVE-2026-45929 | 7.8 HIGH | ovpn: fix possible use-after-free in ovpn_net_xmit |
Showing top 20 of 276 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46243
smb: client: reject userspace cifs.spnego descriptions - CVE-2026-46242
eventpoll: fix ep_remove struct eventpoll / struct file UAF - CVE-2026-46241
spi: mpc52xx: fix use-after-free on registration failure - CVE-2026-46239
media: i2c: ov5647: Fix runtime PM refcount leak in s_ctrl - CVE-2026-46240
media: iris: Fix use-after-free in iris_release_internal_buf
Same vendor: Linux
- CVE-2026-46243
smb: client: reject userspace cifs.spnego descriptions - CVE-2026-46242
eventpoll: fix ep_remove struct eventpoll / struct file UAF - CVE-2026-46241
spi: mpc52xx: fix use-after-free on registration failure - CVE-2026-46239
media: i2c: ov5647: Fix runtime PM refcount leak in s_ctrl - CVE-2026-46240
media: iris: Fix use-after-free in iris_release_internal_buf
V. Comments for CVE-2026-46049
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