Linux Kernel up to 7.2.5 octeon cvm_oct_tx_do_cleanup use after free

CVSS Meta Temp Score
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CTI Interest Score
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9.5$5k-$25k0.00+

Summaryinfo

A vulnerability, which was classified as very critical, has been found in Linux Kernel up to 7.2.5. This affects the function cvm_oct_tx_do_cleanup of the component octeon. Performing a manipulation results in use after free. This vulnerability is known as CVE-2026-93279. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in Linux Kernel up to 7.2.5. This affects the function cvm_oct_tx_do_cleanup of the component octeon. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: staging: octeon: add missing tasklet_kill in cvm_oct_tx_shutdown The TX cleanup tasklet can be scheduled by the watchdog IRQ handler to execute cvm_oct_tx_do_cleanup. There can be a pending tasklet in the queue which might run after the cvm_oct_remove() frees net_device structures, causing a use-after-free in cvm_oct_tx_do_cleanup() as it iterates cvm_oct_device[] which is an array of netdevice pointers. Add tasklet_kill() after free_irq() to ensure the tasklet is no longer scheduled or running before teardown proceeds.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-93279 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 $5k-$25k 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, 6.18.52, 7.2.6 or 7.3-rc1 eliminates this vulnerability. Applying the patch 32efcb6d5f4e3f030e7b0a3ba5c6c0684dd07486/d15226338dfaa84ffff142d32723cdf74d0c47c4/a77efd85e0d48c877f66d2bc3ab89cc1b8dacd19/b6365e4186322858a82c8713b1d0bd209c8e765a/03d12490afd1198310ad0aba42462329832eb739/2c0c9956596e48654bb4855e2a0742748a0826a7/41a79bd9e5a74f8f483b3b206d10567912874fb4/b9af44b0d20b2247c4eb0ea5cfca907d643eea50 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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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
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: Use after free
CWE: CWE-416 / CWE-119
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 5.10.270/5.15.221/6.1.188/6.6.157/6.12.110/6.18.52/7.2.6/7.3-rc1
Patch: 32efcb6d5f4e3f030e7b0a3ba5c6c0684dd07486/d15226338dfaa84ffff142d32723cdf74d0c47c4/a77efd85e0d48c877f66d2bc3ab89cc1b8dacd19/b6365e4186322858a82c8713b1d0bd209c8e765a/03d12490afd1198310ad0aba42462329832eb739/2c0c9956596e48654bb4855e2a0742748a0826a7/41a79bd9e5a74f8f483b3b206d10567912874fb4/b9af44b0d20b2247c4eb0ea5cfca907d643eea50

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-2026-93279 (🔒)
GCVE (CVE): GCVE-0-2026-93279
GCVE (VulDB): GCVE-100-409725

Entryinfo

Created: 09/24/2026 20:29
Changes: 09/24/2026 20:29 (59)
Complete: 🔍
Cache ID: 216::103

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