CVE-2025-68348

In the Linux kernel, the following vulnerability has been resolved: block: fix memory leak in __blkdev_issue_zero_pages Move the fatal signal check before bio_alloc() to prevent a memory leak when BLKDEV_ZERO_KILLABLE is set and a fatal signal is pending. Previously, the bio was allocated before checking for a fatal signal. If a signal was pending, the code would break out of the loop without freeing or chaining the just-allocated bio, causing a memory leak. This matches the pattern already used in __blkdev_issue_write_zeroes() where the signal check precedes the allocation.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/453e4b0c84d0db1454ff0adf655d91179e6fca3a
https://git.kernel.org/stable/c/7193407bc4457212fa38ec3aff9c640e63a8dbef
https://git.kernel.org/stable/c/7957635c679e8a01147163a3a4a1f16e1210fa03
https://git.kernel.org/stable/c/f7e3f852a42d7cd8f1af2c330d9d153e30c8adcf

Configurations

No configuration.

History

No history.

Information

Published : 2025-12-24 11:15

Updated : 2026-06-17 09:58

NVD link : CVE-2025-68348

Mitre link : CVE-2025-68348

CVE.ORG link : CVE-2025-68348

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2025-68348", "cveTags": [], "metrics": {}, "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": "bf86bcdb40123ee99669ee91b67e023669433a1a", "lessThan": "453e4b0c84d0db1454ff0adf655d91179e6fca3a", "versionType": "git"}, {"status": "affected", "version": "bf86bcdb40123ee99669ee91b67e023669433a1a", "lessThan": "7957635c679e8a01147163a3a4a1f16e1210fa03", "versionType": "git"}, {"status": "affected", "version": "bf86bcdb40123ee99669ee91b67e023669433a1a", "lessThan": "7193407bc4457212fa38ec3aff9c640e63a8dbef", "versionType": "git"}, {"status": "affected", "version": "bf86bcdb40123ee99669ee91b67e023669433a1a", "lessThan": "f7e3f852a42d7cd8f1af2c330d9d153e30c8adcf", "versionType": "git"}], "programFiles": ["block/blk-lib.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.11"}, {"status": "unaffected", "version": "0", "lessThan": "6.11", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.63", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.17.13", "versionType": "semver", "lessThanOrEqual": "6.17.*"}, {"status": "unaffected", "version": "6.18.2", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["block/blk-lib.c"], "defaultStatus": "affected"}]}], "published": "2025-12-24T11:15:58.147", "references": [{"url": "https://git.kernel.org/stable/c/453e4b0c84d0db1454ff0adf655d91179e6fca3a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7193407bc4457212fa38ec3aff9c640e63a8dbef", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7957635c679e8a01147163a3a4a1f16e1210fa03", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f7e3f852a42d7cd8f1af2c330d9d153e30c8adcf", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Deferred", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: fix memory leak in __blkdev_issue_zero_pages\n\nMove the fatal signal check before bio_alloc() to prevent a memory\nleak when BLKDEV_ZERO_KILLABLE is set and a fatal signal is pending.\n\nPreviously, the bio was allocated before checking for a fatal signal.\nIf a signal was pending, the code would break out of the loop without\nfreeing or chaining the just-allocated bio, causing a memory leak.\n\nThis matches the pattern already used in __blkdev_issue_write_zeroes()\nwhere the signal check precedes the allocation."}], "lastModified": "2026-06-17T09:58:58.770", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}