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CVE Record

CVE-2024-46849: ASoC: meson: axg-card: fix 'use-after-free'

In the Linux kernel, the following vulnerability has been resolved: ASoC: meson: axg-card: fix 'use-after-free' Buffer 'card->dai_link' is reallocated in 'meson_card_reallocate_links()', so move 'pad' pointer initialization after this function when memory is already reallocated. Kasan bug report: ================================================================== BUG: KASAN: slab-use-after-free in axg_card_add_link+0x76c/0x9bc Read of size 8 at addr ffff000000e8b260 by task modprobe/356 CPU: 0 PID: 356 Comm: modprobe Tainted: G O 6.9.12-sdkernel #1 Call trace: dump_backtrace+0x94/0xec show_stack+0x18/0x24 dump_stack_lvl+0x78/0x90 print_report+0xfc/0x5c0 kasan_report+0xb8/0xfc __asan_load8+0x9c/0xb8 axg_card_add_link+0x76c/0x9bc [snd_soc_meson_axg_sound_card] meson_card_probe+0x344/0x3b8 [snd_soc_meson_card_utils] platform_probe+0x8c/0xf4 really_probe+0x110/0x39c __driver_probe_device+0xb8/0x18c driver_probe_device+0x108/0x1d8 __driver_attach+0xd0/0x25c bus_for_each_dev+0xe0/0x154 driver_attach+0x34/0x44 bus_add_driver+0x134/0x294 driver_register+0xa8/0x1e8 __platform_driver_register+0x44/0x54 axg_card_pdrv_init+0x20/0x1000 [snd_soc_meson_axg_sound_card] do_one_initcall+0xdc/0x25c do_init_module+0x10c/0x334 load_module+0x24c4/0x26cc init_module_from_file+0xd4/0x128 __arm64_sys_finit_module+0x1f4/0x41c invoke_syscall+0x60/0x188 el0_svc_common.constprop.0+0x78/0x13c do_el0_svc+0x30/0x40 el0_svc+0x38/0x78 el0t_64_sync_handler+0x100/0x12c el0t_64_sync+0x190/0x194

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2024-46849 is a Linux kernel memory safety bug in the Amlogic Meson AXG audio card driver. The sources describe a use-after-free found by KASAN during module probing. Business urgency depends on whether affected kernels and this driver are present on your Linux fleet, especially embedded or ARM-based systems.

Executive priority

Patch through normal kernel maintenance, with higher priority for products or appliances using Amlogic Meson audio hardware. There is no source-backed evidence of active exploitation, but kernel memory safety issues can affect platform reliability and should not be left indefinitely.

Technical view

The bug is in ASoC meson axg-card handling. meson_card_reallocate_links() can reallocate card->dai_link, leaving a previously initialized pad pointer stale. The fix moves pad initialization after reallocation. The KASAN trace shows slab-use-after-free in axg_card_add_link during modprobe/platform probe.

Likely exposure

Most likely exposure is Linux systems running affected kernel branches with the Meson AXG sound card driver built or loadable. Generic cloud or server systems without this hardware/driver are less likely exposed. The bundle lists Linux as affected and does not provide CPEs or distribution-specific package ranges beyond Debian advisory references.

Exploitation context

The bundle does not show CVSS, CWE, public exploitation, or KEV listing. Evidence is a KASAN crash report during module loading/probing, not an active attack report. Treat exploitation status as unconfirmed and avoid assuming remote reachability from the provided sources.

Researcher notes

Key evidence is the KASAN slab-use-after-free trace and stable kernel commits. The source bundle does not establish privilege impact, attack vector, or exploitability beyond module probe behavior. Validate exposure through kernel configuration, hardware presence, and downstream backports rather than version numbers alone.

Mitigation direction

  • Apply vendor kernel updates containing the referenced stable fixes.
  • Prioritize embedded or ARM Linux assets using Amlogic Meson audio hardware.
  • Review Debian LTS advisories if using Debian-derived kernels.
  • If no vendor update exists, follow vendor guidance for driver exposure reduction.

Validation and detection

  • Inventory kernel versions against the affected ranges in the CVE bundle.
  • Check whether the Meson AXG sound card driver is enabled or loadable.
  • Confirm your kernel includes one of the referenced stable commits.
  • Review vendor or distribution advisories for package-level fixed versions.
Prepared
Confidence
medium
Sources
11

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2024-46849 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
2ADP providers
10Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux7864a79f37b55769b817d5e6c5ae0ca4bfdba93b, 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b, 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b, 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b, 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b, 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b, 7864a79f37b55769b817d5e6c5ae0ca4bfdba93bunaffected
LinuxLinux4.19, 0, 5.4.285, 5.10.227, 5.15.168, 6.1.111, 6.6.52, 6.10.11, 6.11affected
Weakness

CWE details

No CWE listed

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