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CVE Record

CVE-2022-49515: ASoC: cs35l41: Fix an out-of-bounds access in otp_packed_element_t

In the Linux kernel, the following vulnerability has been resolved: ASoC: cs35l41: Fix an out-of-bounds access in otp_packed_element_t The CS35L41_NUM_OTP_ELEM is 100, but only 99 entries are defined in the array otp_map_1/2[CS35L41_NUM_OTP_ELEM], this will trigger UBSAN to report a shift-out-of-bounds warning in the cs35l41_otp_unpack() since the last entry in the array will result in GENMASK(-1, 0). UBSAN reports this problem: UBSAN: shift-out-of-bounds in /home/hwang4/build/jammy/jammy/sound/soc/codecs/cs35l41-lib.c:836:8 shift exponent 64 is too large for 64-bit type 'long unsigned int' CPU: 10 PID: 595 Comm: systemd-udevd Not tainted 5.15.0-23-generic #23 Hardware name: LENOVO \x02MFG_IN_GO/\x02MFG_IN_GO, BIOS N3GET19W (1.00 ) 03/11/2022 Call Trace: <TASK> show_stack+0x52/0x58 dump_stack_lvl+0x4a/0x5f dump_stack+0x10/0x12 ubsan_epilogue+0x9/0x45 __ubsan_handle_shift_out_of_bounds.cold+0x61/0xef ? regmap_unlock_mutex+0xe/0x10 cs35l41_otp_unpack.cold+0x1c6/0x2b2 [snd_soc_cs35l41_lib] cs35l41_hda_probe+0x24f/0x33a [snd_hda_scodec_cs35l41] cs35l41_hda_i2c_probe+0x65/0x90 [snd_hda_scodec_cs35l41_i2c] ? cs35l41_hda_i2c_remove+0x20/0x20 [snd_hda_scodec_cs35l41_i2c] i2c_device_probe+0x252/0x2b0

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2022-49515 is a Linux kernel bug in the CS35L41 audio codec driver. A mismatched table size can cause an out-of-bounds/invalid shift during device probing, producing UBSAN warnings. The sources do not provide CVSS, business impact, or evidence of active exploitation.

Executive priority

Treat as a targeted kernel maintenance issue, not an emergency based on current evidence. Patch through normal Linux kernel update channels, with higher priority for affected laptop fleets or environments that enable UBSAN-style runtime checks.

Technical view

In sound/soc/codecs/cs35l41-lib.c, CS35L41_NUM_OTP_ELEM is 100 while otp_map_1/2 define 99 entries. During cs35l41_otp_unpack(), the final entry can produce GENMASK(-1, 0), causing a shift-out-of-bounds condition reported by UBSAN during cs35l41 HDA/I2C probe.

Likely exposure

Exposure appears limited to Linux systems using kernels with the affected CS35L41 codec driver path, especially hardware that probes snd_hda_scodec_cs35l41 or related I2C components. The provided source metadata lists affected Linux kernel versions but lacks precise distribution mapping.

Exploitation context

The bundle marks KEV as false and provides no cited evidence of exploitation in the wild. The available trace shows detection during local hardware/device probing by systemd-udevd, not a remote attack path.

Researcher notes

Evidence is narrow: source text describes the bug and stack trace, while CVSS, CWE, exploitability, and impact are absent. Analysis should stay tied to the CS35L41 driver and referenced kernel stable commits.

Mitigation direction

  • Apply a Linux kernel or distribution update containing the referenced stable fixes.
  • Check vendor or distribution advisories for backported fixes and supported package versions.
  • Prioritize laptops or endpoints with CS35L41 audio hardware or loaded cs35l41 modules.
  • Avoid claiming remediation complete until package changelogs or source commits confirm the fix.

Validation and detection

  • Inventory kernel versions and hardware using CS35L41 audio codec components.
  • Check kernel package changelogs for the referenced stable commit identifiers.
  • Review logs for UBSAN shift-out-of-bounds reports in cs35l41_otp_unpack().
  • Confirm updated kernels no longer contain the 100-versus-99 OTP element mismatch.
Prepared
Confidence
medium
Sources
5

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

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CVE-2022-49515 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
0ADP providers
4Source links

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.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux6450ef55905688602175fae4ed1bfbfef6a14dde, 6450ef55905688602175fae4ed1bfbfef6a14dde, 6450ef55905688602175fae4ed1bfbfef6a14ddeunaffected
LinuxLinux5.16, 0, 5.17.14, 5.18.3, 5.19affected
Weakness

CWE details

No CWE listed

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