CVE-2026-93049: Linux

Описание

Оригинално описание

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.

Засегнати продукти

• Linux Linux: e8e3edb95ce6a146bc774b6cfad3553f4383edc8 преди ecadb9137aeaa0615183f8d23eabea2b45c862f1; e8e3edb95ce6a146bc774b6cfad3553f4383edc8 преди eec130fc9ffbbd08a5d5432683122b79aca2a726; e8e3edb95ce6a146bc774b6cfad3553f4383edc8 преди d5086911d532b82ca070d944aa08ddde00baefe4; e8e3edb95ce6a146bc774b6cfad3553f4383edc8 преди 0ce48c6ddea1a8e675a2eb0221b62a9950788f3c; e8e3edb95ce6a146bc774b6cfad3553f4383edc8 преди a82d93fcfdfd26af17049c34319dfdd079cd1901; e8e3edb95ce6a146bc774b6cfad3553f4383edc8 преди 5c349c533e72af2313c3be0f80a24d7407fa4777; e8e3edb95ce6a146bc774b6cfad3553f4383edc8 преди 37be7bc2c2d09c18e939da20224405864a0090b9; e8e3edb95ce6a146bc774b6cfad3553f4383edc8 преди 779aa4c66a96bf43d2d62982ea1a9096a9128d87
• Linux Linux: 4.14; преди 4.14; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.52 до 6.18.*; 7.2.6 до 7.2.*; 7.3 до *

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-93049
• https://nvd.nist.gov/vuln/detail/CVE-2026-93049
• https://git.kernel.org/stable/c/ecadb9137aeaa0615183f8d23eabea2b45c862f1
• https://git.kernel.org/stable/c/eec130fc9ffbbd08a5d5432683122b79aca2a726
• https://git.kernel.org/stable/c/d5086911d532b82ca070d944aa08ddde00baefe4
• https://git.kernel.org/stable/c/0ce48c6ddea1a8e675a2eb0221b62a9950788f3c
• https://git.kernel.org/stable/c/a82d93fcfdfd26af17049c34319dfdd079cd1901
• https://git.kernel.org/stable/c/5c349c533e72af2313c3be0f80a24d7407fa4777
• https://git.kernel.org/stable/c/37be7bc2c2d09c18e939da20224405864a0090b9
• https://git.kernel.org/stable/c/779aa4c66a96bf43d2d62982ea1a9096a9128d87