by Kastro CVE-2026-74376
Linux Linux — md/raid10: reset read_slot when reusing r10bio for discard
Description · from the CVE record
In the Linux kernel, the following vulnerability has been resolved: md/raid10: reset read_slot when reusing r10bio for discard put_all_bios() always drops devs[i].bio, but it only drops devs[i].repl_bio when r10_bio->read_slot < 0. If discard reuses an r10bio that was previously used for a read, read_slot can still be non-negative, and discard cleanup can skip bio_put() on repl_bio. Reset read_slot to -1 when preparing an r10bio for discard so the replacement bio is always released correctly.
Affected
ProductAffectedFixed inSource
Linuxd30588b2731fb01e1616cf16c3fe79a1443e29aa – < 3cb2a606ce4902eceabe68338df0653312f861f83cb2a606ce4902eceabe68338df0653312f861f8CNA
Linuxd30588b2731fb01e1616cf16c3fe79a1443e29aa – < 561c9711e4f545d6464a023168bdee03b00fa945561c9711e4f545d6464a023168bdee03b00fa945CNA
Linuxd30588b2731fb01e1616cf16c3fe79a1443e29aa – < ce3030e92f14362880055de5fe3c258971118853ce3030e92f14362880055de5fe3c258971118853CNA
Linuxd30588b2731fb01e1616cf16c3fe79a1443e29aa – < 742e4afd247d9c972695227716b03d432a7e1d26742e4afd247d9c972695227716b03d432a7e1d26CNA
Linuxd30588b2731fb01e1616cf16c3fe79a1443e29aa – < b7313f23ea5a79b199a007bfad64a866cc2c22e7b7313f23ea5a79b199a007bfad64a866cc2c22e7CNA
Linuxd30588b2731fb01e1616cf16c3fe79a1443e29aa – < eb04e3e9c14ed15914f5fd2eae8b6435f54f095feb04e3e9c14ed15914f5fd2eae8b6435f54f095fCNA
Linuxd30588b2731fb01e1616cf16c3fe79a1443e29aa – < 6b8a26af065ddc93de2aa5c9f0df98dce97234426b8a26af065ddc93de2aa5c9f0df98dce9723442CNA
Linux5.135.15.212CNA
Scores by source
Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total