CVE-2026-93049

In the Linux kernel, the following vulnerability has been resolved: mtd: mtdswap: Avoid freeing registered blktrans device twice In mtdswap_add_mtd(), debugfs setup failure after successful blktrans registration can free mbd_dev twice. add_mtd_blktrans_dev() initializes the blktrans device reference and publishes the disk. Once that succeeds, del_mtd_blktrans_dev() tears the disk down and drops the blktrans reference; when that reference reaches zero, blktrans_dev_release() frees the mtd_blktrans_dev. The debugfs failure path called del_mtd_blktrans_dev(mbd_dev), then fell through the common cleanup label and called kfree(mbd_dev) again. Clear the local pointer after deregistration so the common cleanup can still release the mtdswap state without freeing the blktrans object twice. This issue was found by a static analysis checker and confirmed by manual source review.

• https://git.kernel.org/stable/c/0ce48c6ddea1a8e675a2eb0221b62a9950788f3c
• https://git.kernel.org/stable/c/37be7bc2c2d09c18e939da20224405864a0090b9
• https://git.kernel.org/stable/c/5c349c533e72af2313c3be0f80a24d7407fa4777
• https://git.kernel.org/stable/c/779aa4c66a96bf43d2d62982ea1a9096a9128d87
• https://git.kernel.org/stable/c/a82d93fcfdfd26af17049c34319dfdd079cd1901
• https://git.kernel.org/stable/c/d5086911d532b82ca070d944aa08ddde00baefe4
• https://git.kernel.org/stable/c/ecadb9137aeaa0615183f8d23eabea2b45c862f1
• https://git.kernel.org/stable/c/eec130fc9ffbbd08a5d5432683122b79aca2a726

Published

Sep 17, 2026

Last Modified

Sep 17, 2026

Status

Received

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-93043In the Linux kernel, the following vulnerability has been re…
• CVE-2026-93044In the Linux kernel, the following vulnerability has been re…
• CVE-2026-93045In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-93046In the Linux kernel, the following vulnerability has been re…7
• CVE-2026-93047In the Linux kernel, the following vulnerability has been re…
• CVE-2026-93048In the Linux kernel, the following vulnerability has been re…
• CVE-2026-9305A weakness has been identified in QuantumNous new-api up to …6.3
• CVE-2026-93050In the Linux kernel, the following vulnerability has been re…
• CVE-2026-93051In the Linux kernel, the following vulnerability has been re…
• CVE-2026-93052In the Linux kernel, the following vulnerability has been re…
• CVE-2026-93053In the Linux kernel, the following vulnerability has been re…
• CVE-2026-93054In the Linux kernel, the following vulnerability has been re…7