md/raid10: reset read_slot when reusing r10bio for discard
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.8epss 0.5%
exploitation probability
0.5%top 58% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/3cb2a606ce4902eceabe68338df0653312f861f8https://git.kernel.org/stable/c/561c9711e4f545d6464a023168bdee03b00fa945https://git.kernel.org/stable/c/6b8a26af065ddc93de2aa5c9f0df98dce9723442https://git.kernel.org/stable/c/742e4afd247d9c972695227716b03d432a7e1d26https://git.kernel.org/stable/c/b7313f23ea5a79b199a007bfad64a866cc2c22e7https://git.kernel.org/stable/c/ce3030e92f14362880055de5fe3c258971118853https://git.kernel.org/stable/c/eb04e3e9c14ed15914f5fd2eae8b6435f54f095f