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Description

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.

PUBLISHED Reserved 2025-12-16 | Published 2025-12-24 | Updated 2025-12-24 | Assigner Linux

Product status

Default status
unaffected

bf86bcdb40123ee99669ee91b67e023669433a1a (git) before 453e4b0c84d0db1454ff0adf655d91179e6fca3a
affected

bf86bcdb40123ee99669ee91b67e023669433a1a (git) before 7957635c679e8a01147163a3a4a1f16e1210fa03
affected

bf86bcdb40123ee99669ee91b67e023669433a1a (git) before 7193407bc4457212fa38ec3aff9c640e63a8dbef
affected

bf86bcdb40123ee99669ee91b67e023669433a1a (git) before f7e3f852a42d7cd8f1af2c330d9d153e30c8adcf
affected

Default status
affected

6.11
affected

Any version before 6.11
unaffected

6.12.63 (semver)
unaffected

6.17.13 (semver)
unaffected

6.18.2 (semver)
unaffected

6.19-rc1 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/453e4b0c84d0db1454ff0adf655d91179e6fca3a

git.kernel.org/...c/7957635c679e8a01147163a3a4a1f16e1210fa03

git.kernel.org/...c/7193407bc4457212fa38ec3aff9c640e63a8dbef

git.kernel.org/...c/f7e3f852a42d7cd8f1af2c330d9d153e30c8adcf

cve.org (CVE-2025-68348)

nvd.nist.gov (CVE-2025-68348)

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Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.