High

CVE-2026-93039 — ASoC: meson: Keep link pointers valid on realloc failure

In the Linux kernel, the following vulnerability has been resolved: ASoC: meson: Keep link pointers valid on realloc failure meson_card_reallocate_links() grows the DAI link and private data arrays with two consecutive krealloc() calls and updates the owner pointers only after both calls have succeeded. A successful krealloc() may move the data: it frees the old block and returns a new one. When that happens for the link array and the second krealloc() then fails, card->dai_link still points to the block that krealloc() already freed, and the error path frees the new block too. The probe error path then calls meson_card_clean_references(), which dereferences card->dai_link and kfree()s it again, resulting in a use-after-free and a double free. Commit card->dai_link and card->num_links right after the first krealloc() succeeds, so the pointer always refers to a valid allocation that meson_card_clean_references() can walk and free. krealloc() with __GFP_ZERO zero-initializes the added entries, so walking them on the error path is safe. With both failure paths reduced to a plain return, drop the goto labels and the error message.

Published Sep 17, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+1
Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.16%

ahead of 4% of scored CVEs · Oct 15, 2026

Affects

Linux

CVSS base

7.4

High · 2 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b and < de33afc57f24538186bccf4c4f6c65dd38634fd8≥ 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b and < 1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642≥ 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b and < 8db0a0fc84e80aa9924e0833aef6cc95df94e5a7≥ 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b and < 41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab≥ 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b and < 0b30fbe6bf7cf6499b19dd886f466e7c9e820089≥ 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b and < 8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d≥ 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b and < 5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe≥ 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b and < 2aaa41cf974f83a6fb105422bac4e2f107150774 and 1 more version 4.19	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

High

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
7.4	CVSS 3.1	High	1.4	5.9	416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database
7.4	CVSS 3.1	High	—	—	Linux via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H (score shown at the top: 416baaa9-dc9f-4396-8d5f-8c081fb06d67)

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.

endpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 7.4
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Sep 17, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/0b30fbe6bf7cf6499b19dd886f466e7c9e820089
NIST National Vulnerability Database
git.kernel.org/stable/c/8db0a0fc84e80aa9924e0833aef6cc95df94e5a7
NIST National Vulnerability Database
git.kernel.org/stable/c/1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642
NIST National Vulnerability Database
git.kernel.org/stable/c/5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe
NIST National Vulnerability Database
git.kernel.org/stable/c/8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d
NIST National Vulnerability Database
git.kernel.org/stable/c/2aaa41cf974f83a6fb105422bac4e2f107150774
NIST National Vulnerability Database
git.kernel.org/stable/c/41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab
NIST National Vulnerability Database
git.kernel.org/stable/c/de33afc57f24538186bccf4c4f6c65dd38634fd8
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 1d
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 1d
Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 2d
Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 2d
Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 2d
Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 2d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-93039 is "ASoC: meson: Keep link pointers valid on realloc failure", rated High. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.4 describes technical severity. EPSS 0.16% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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