Linux Kernel up to 7.2.4 meson vdec_try_fmt_common max_width null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.2.4. It has been classified as critical. The impacted element is the function vdec_try_fmt_common of the component meson. Performing a manipulation of the argument max_width results in null pointer dereference. This vulnerability is cataloged as CVE-2026-93236. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 7.2.4. This affects the function vdec_try_fmt_common of the component meson. The manipulation of the argument max_width with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: media: meson: vdec: fix NULL pointer deref in vdec_try_fmt_common When VIDIOC_TRY_FMT is called with an unsupported pixel format on the OUTPUT queue, vdec_try_fmt_common() falls back to V4L2_PIX_FMT_MPEG2. However, if a distro has locally patched MPEG2 support out (as it has been broken for some time) the platform format table does not contain MPEG2 so find_format() returns NULL and the subsequent dereference of fmt_out->max_width triggers a NULL pointer dereference. Fix this by falling back to the first format in the platform's format array instead of hardcoding V4L2_PIX_FMT_MPEG2. This is always valid since every platform defines at least one format.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-93236 since 09/17/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/24/2026).

Upgrading to version 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5 or 7.3-rc1 eliminates this vulnerability. Applying the patch 276f28672bb6d5d5feca78db4219c7b5adf1be26/c620906fb1b2ad75d408ea9d06040d66952d4a31/3839b6be2279fc4f558723f2c0fbfc9c42070958/680a89683197cdfe4e03e6fd7755454c647d39c1/f2375a308640e401c142c5426d52c3d10e016d25/96dafbae77f50bfe2228bcfedcd8652c5e5f08e8/d61ba609c3226af3c84268ba606ea06ee63e511b/20aa934ace6917262ff579a73ec018d06a7bad1c is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.270/5.15.221/6.1.188/6.6.157/6.12.110/6.18.51/7.2.5/7.3-rc1
Patch: 276f28672bb6d5d5feca78db4219c7b5adf1be26/c620906fb1b2ad75d408ea9d06040d66952d4a31/3839b6be2279fc4f558723f2c0fbfc9c42070958/680a89683197cdfe4e03e6fd7755454c647d39c1/f2375a308640e401c142c5426d52c3d10e016d25/96dafbae77f50bfe2228bcfedcd8652c5e5f08e8/d61ba609c3226af3c84268ba606ea06ee63e511b/20aa934ace6917262ff579a73ec018d06a7bad1c

Timelineinfo

09/17/2026 CVE reserved
09/24/2026 +7 days Advisory disclosed
09/24/2026 +0 days VulDB entry created
09/24/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-93236 (🔒)
GCVE (CVE): GCVE-0-2026-93236
GCVE (VulDB): GCVE-100-409449

Entryinfo

Created: 09/24/2026 18:09
Changes: 09/24/2026 18:09 (60)
Complete: 🔍
Cache ID: 216::103

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