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CVE-2026-74376

md/raid10: reset read_slot when reusing r10bio for discard

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, and 1 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: total

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From d30588b2731fb01e1616cf16c3fe79a1443e29aa · fixed in 3cb2a606ce4902eceabe68338df0653312f861f8; From d30588b2731fb01e1616cf16c3fe79a1443e29aa · fixed in 561c9711e4f545d6464a023168bdee03b00fa945; From d30588b2731fb01e1616cf16c3fe79a1443e29aa · fixed in ce3030e92f14362880055de5fe3c258971118853; From d30588b2731fb01e1616cf16c3fe79a1443e29aa · fixed in 742e4afd247d9c972695227716b03d432a7e1d26; From d30588b2731fb01e1616cf16c3fe79a1443e29aa · fixed in b7313f23ea5a79b199a007bfad64a866cc2c22e7; From d30588b2731fb01e1616cf16c3fe79a1443e29aa · fixed in eb04e3e9c14ed15914f5fd2eae8b6435f54f095f; From d30588b2731fb01e1616cf16c3fe79a1443e29aa · fixed in 6b8a26af065ddc93de2aa5c9f0df98dce9723442

  • Linux Linux

    5.13

  • KernelLinux

    From 5.13.0 · fixed in 5.15.212; From 5.16.0 · fixed in 6.1.178; From 6.2.0 · fixed in 6.6.145; From 6.7.0 · fixed in 6.12.97; From 6.13.0 · fixed in 6.18.40; From 6.19.0 · fixed in 7.1.5

References 7

git.kernel.org