Vulnerability-Lookup

FKIE_CVE-2026-43075

Vulnerability from fkie_nvd - Published: 2026-05-06 10:16 - Updated: 2026-05-20 23:19

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix out-of-bounds write in ocfs2_write_end_inline KASAN reports a use-after-free write of 4086 bytes in ocfs2_write_end_inline, called from ocfs2_write_end_nolock during a copy_file_range splice fallback on a corrupted ocfs2 filesystem mounted on a loop device. The actual bug is an out-of-bounds write past the inode block buffer, not a true use-after-free. The write overflows into an adjacent freed page, which KASAN reports as UAF. The root cause is that ocfs2_try_to_write_inline_data trusts the on-disk id_count field to determine whether a write fits in inline data. On a corrupted filesystem, id_count can exceed the physical maximum inline data capacity, causing writes to overflow the inode block buffer. Call trace (crash path): vfs_copy_file_range (fs/read_write.c:1634) do_splice_direct splice_direct_to_actor iter_file_splice_write ocfs2_file_write_iter generic_perform_write ocfs2_write_end ocfs2_write_end_nolock (fs/ocfs2/aops.c:1949) ocfs2_write_end_inline (fs/ocfs2/aops.c:1915) memcpy_from_folio <-- KASAN: write OOB So add id_count upper bound check in ocfs2_validate_inode_block() to alongside the existing i_size check to fix it.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0c1af902223b6fcedb60904ca0b551254686c7b9	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/69d3c69ade1e4285ab4ca48fe7acee0767e65604	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7bc5da4842bed3252d26e742213741a4d0ac1b14	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/947f953978b0d9463498d548d0f054f5a75be2e9	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e2c9dc6b6e96f3585f2a1062ca3374a52db0938f	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	2.6.24
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

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    }
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  "id": "CVE-2026-43075",
  "lastModified": "2026-05-20T23:19:40.187",
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CVE-2026-43075 (GCVE-0-2026-43075)

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-11 22:17

Title

ocfs2: fix out-of-bounds write in ocfs2_write_end_inline

Summary

Severity ?

7.8 (High)


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

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/e2c9dc6b6e96f3585…
https://git.kernel.org/stable/c/947f953978b0d9463…
https://git.kernel.org/stable/c/0c1af902223b6fced…
https://git.kernel.org/stable/c/69d3c69ade1e4285a…
https://git.kernel.org/stable/c/7bc5da4842bed3252…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1afc32b952335f665327a1a9001ba1b44bb76fd9 , < e2c9dc6b6e96f3585f2a1062ca3374a52db0938f (git) Affected: 1afc32b952335f665327a1a9001ba1b44bb76fd9 , < 947f953978b0d9463498d548d0f054f5a75be2e9 (git) Affected: 1afc32b952335f665327a1a9001ba1b44bb76fd9 , < 0c1af902223b6fcedb60904ca0b551254686c7b9 (git) Affected: 1afc32b952335f665327a1a9001ba1b44bb76fd9 , < 69d3c69ade1e4285ab4ca48fe7acee0767e65604 (git) Affected: 1afc32b952335f665327a1a9001ba1b44bb76fd9 , < 7bc5da4842bed3252d26e742213741a4d0ac1b14 (git)
Linux	Linux	Affected: 2.6.24 Unaffected: 0 , < 2.6.24 (semver) Unaffected: 6.6.136 , ≤ 6.6.* (semver) Unaffected: 6.12.83 , ≤ 6.12.* (semver) Unaffected: 6.18.24 , ≤ 6.18.* (semver) Unaffected: 6.19.14 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-43075

CVE-2026-43075 (GCVE-0-2026-43075)

Tags

Sightings

Nomenclature