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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/3cb2a606ce4902eceabe68338df0653312f861f8
https://git.kernel.org/stable/c/561c9711e4f545d6464a023168bdee03b00fa945
https://git.kernel.org/stable/c/6b8a26af065ddc93de2aa5c9f0df98dce9723442
https://git.kernel.org/stable/c/742e4afd247d9c972695227716b03d432a7e1d26
https://git.kernel.org/stable/c/b7313f23ea5a79b199a007bfad64a866cc2c22e7
https://git.kernel.org/stable/c/ce3030e92f14362880055de5fe3c258971118853
https://git.kernel.org/stable/c/eb04e3e9c14ed15914f5fd2eae8b6435f54f095f

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:22

Updated : 2026-08-17 06:19

NVD link : CVE-2026-74376

Mitre link : CVE-2026-74376

CVE.ORG link : CVE-2026-74376

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-74376", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "d30588b2731fb01e1616cf16c3fe79a1443e29aa", "lessThan": "3cb2a606ce4902eceabe68338df0653312f861f8", "versionType": "git"}, {"status": "affected", "version": "d30588b2731fb01e1616cf16c3fe79a1443e29aa", "lessThan": "561c9711e4f545d6464a023168bdee03b00fa945", "versionType": "git"}, {"status": "affected", "version": "d30588b2731fb01e1616cf16c3fe79a1443e29aa", "lessThan": "ce3030e92f14362880055de5fe3c258971118853", "versionType": "git"}, {"status": "affected", "version": "d30588b2731fb01e1616cf16c3fe79a1443e29aa", "lessThan": "742e4afd247d9c972695227716b03d432a7e1d26", "versionType": "git"}, {"status": "affected", "version": "d30588b2731fb01e1616cf16c3fe79a1443e29aa", "lessThan": "b7313f23ea5a79b199a007bfad64a866cc2c22e7", "versionType": "git"}, {"status": "affected", "version": "d30588b2731fb01e1616cf16c3fe79a1443e29aa", "lessThan": "eb04e3e9c14ed15914f5fd2eae8b6435f54f095f", "versionType": "git"}, {"status": "affected", "version": "d30588b2731fb01e1616cf16c3fe79a1443e29aa", "lessThan": "6b8a26af065ddc93de2aa5c9f0df98dce9723442", "versionType": "git"}], "programFiles": ["drivers/md/raid10.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.13"}, {"status": "unaffected", "version": "0", "lessThan": "5.13", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.212", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.178", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/md/raid10.c"], "defaultStatus": "affected"}]}], "published": "2026-08-15T06:22:39.373", "references": [{"url": "https://git.kernel.org/stable/c/3cb2a606ce4902eceabe68338df0653312f861f8", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/561c9711e4f545d6464a023168bdee03b00fa945", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6b8a26af065ddc93de2aa5c9f0df98dce9723442", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/742e4afd247d9c972695227716b03d432a7e1d26", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b7313f23ea5a79b199a007bfad64a866cc2c22e7", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ce3030e92f14362880055de5fe3c258971118853", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/eb04e3e9c14ed15914f5fd2eae8b6435f54f095f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid10: reset read_slot when reusing r10bio for discard\n\nput_all_bios() always drops devs[i].bio, but it only drops\ndevs[i].repl_bio when r10_bio->read_slot < 0. If discard reuses an\nr10bio that was previously used for a read, read_slot can still be\nnon-negative, and discard cleanup can skip bio_put() on repl_bio.\n\nReset read_slot to -1 when preparing an r10bio for discard so the\nreplacement bio is always released correctly."}], "lastModified": "2026-08-17T06:19:32.373", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}