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Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: do not free data reservation in fallback from inline due to -ENOSPC If we fail to create an inline extent due to -ENOSPC, we will attempt to go through the normal COW path, reserve an extent, create an ordered extent, etc. However we were always freeing the reserved qgroup data, which is wrong since we will use data. Fix this by freeing the reserved qgroup data in __cow_file_range_inline() only if we are not doing the fallback (ret is <= 0).

PUBLISHED Reserved 2026-03-17 | Published 2026-03-18 | Updated 2026-04-11 | Assigner Linux

Product status

Default status
unaffected

94ed938aba557aa798acf496f09afb289b619fcd (git) before 3edd1f6c7c520536b62b2904807033597554dbac
affected

94ed938aba557aa798acf496f09afb289b619fcd (git) before 3a9fd45afadec1fbfec72057b9473d509fa8b68c
affected

94ed938aba557aa798acf496f09afb289b619fcd (git) before 0a1fbbd780f04d1b6cf48dd327c866ba937de1c4
affected

94ed938aba557aa798acf496f09afb289b619fcd (git) before 6de3a371a8b9fd095198b1aa68c22cc10a4c6961
affected

94ed938aba557aa798acf496f09afb289b619fcd (git) before f8da41de0bff9eb1d774a7253da0c9f637c4470a
affected

Default status
affected

4.4
affected

Any version before 4.4
unaffected

6.1.168 (semver)
unaffected

6.6.134 (semver)
unaffected

6.12.81 (semver)
unaffected

6.18.10 (semver)
unaffected

6.19 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/3edd1f6c7c520536b62b2904807033597554dbac

git.kernel.org/...c/3a9fd45afadec1fbfec72057b9473d509fa8b68c

git.kernel.org/...c/0a1fbbd780f04d1b6cf48dd327c866ba937de1c4

git.kernel.org/...c/6de3a371a8b9fd095198b1aa68c22cc10a4c6961

git.kernel.org/...c/f8da41de0bff9eb1d774a7253da0c9f637c4470a

cve.org (CVE-2025-71269)

nvd.nist.gov (CVE-2025-71269)

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