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CVE-2026-74376

CRITICALCVSS 9.8/10EPSS 0.17%

Last modified

CVE-2026-74376 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.17%

7.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= d30588b2731fb01e1616cf16c3fe79a1443e29aa, < 3cb2a606ce4902eceabe68338df0653312f861f8; >= d30588b2731fb01e1616cf16c3fe79a1443e29aa, < 561c9711e4f545d6464a023168bdee03b00fa945; >= d30588b2731fb01e1616cf16c3fe79a1443e29aa, < ce3030e92f14362880055de5fe3c258971118853; >= d30588b2731fb01e1616cf16c3fe79a1443e29aa, < 742e4afd247d9c972695227716b03d432a7e1d26; >= d30588b2731fb01e1616cf16c3fe79a1443e29aa, < b7313f23ea5a79b199a007bfad64a866cc2c22e7; >= d30588b2731fb01e1616cf16c3fe79a1443e29aa, < eb04e3e9c14ed15914f5fd2eae8b6435f54f095f; >= d30588b2731fb01e1616cf16c3fe79a1443e29aa, < 6b8a26af065ddc93de2aa5c9f0df98dce9723442
LinuxLinux5.13

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74376?
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.
How severe is CVE-2026-74376?
CVE-2026-74376 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74376?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST