CVE-2024-26704
"Linux ext4 Double-Free of Blocks Vulnerability"
Description
In the Linux kernel, the following vulnerability has been resolved: ext4: fix double-free of blocks due to wrong extents moved_len In ext4_move_extents(), moved_len is only updated when all moves are successfully executed, and only discards orig_inode and donor_inode preallocations when moved_len is not zero. When the loop fails to exit after successfully moving some extents, moved_len is not updated and remains at 0, so it does not discard the preallocations. If the moved extents overlap with the preallocated extents, the overlapped extents are freed twice in ext4_mb_release_inode_pa() and ext4_process_freed_data() (as described in commit 94d7c16cbbbd ("ext4: Fix double-free of blocks with EXT4_IOC_MOVE_EXT")), and bb_free is incremented twice. Hence when trim is executed, a zero-division bug is triggered in mb_update_avg_fragment_size() because bb_free is not zero and bb_fragments is zero. Therefore, update move_len after each extent move to avoid the issue.
INFO
Published Date :
April 3, 2024, 3:15 p.m.
Last Modified :
Jan. 14, 2025, 3:37 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
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CVE-2024-26704.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2024-26704 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-26704 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Jan. 14, 2025
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE NIST CWE-415 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 3.18 up to (excluding) 4.19.307 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.269 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.210 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.149 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.79 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.18 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.7.6 *cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/185eab30486ba3e7bf8b9c2e049c79a06ffd2bc1 No Types Assigned https://git.kernel.org/stable/c/185eab30486ba3e7bf8b9c2e049c79a06ffd2bc1 Patch Changed Reference Type https://git.kernel.org/stable/c/185eab30486ba3e7bf8b9c2e049c79a06ffd2bc1 No Types Assigned https://git.kernel.org/stable/c/185eab30486ba3e7bf8b9c2e049c79a06ffd2bc1 Patch Changed Reference Type https://git.kernel.org/stable/c/2883940b19c38d5884c8626483811acf4d7e148f No Types Assigned https://git.kernel.org/stable/c/2883940b19c38d5884c8626483811acf4d7e148f Patch Changed Reference Type https://git.kernel.org/stable/c/2883940b19c38d5884c8626483811acf4d7e148f No Types Assigned https://git.kernel.org/stable/c/2883940b19c38d5884c8626483811acf4d7e148f Patch Changed Reference Type https://git.kernel.org/stable/c/55583e899a5357308274601364741a83e78d6ac4 No Types Assigned https://git.kernel.org/stable/c/55583e899a5357308274601364741a83e78d6ac4 Patch Changed Reference Type https://git.kernel.org/stable/c/55583e899a5357308274601364741a83e78d6ac4 No Types Assigned https://git.kernel.org/stable/c/55583e899a5357308274601364741a83e78d6ac4 Patch Changed Reference Type https://git.kernel.org/stable/c/559ddacb90da1d8786dd8ec4fd76bbfa404eaef6 No Types Assigned https://git.kernel.org/stable/c/559ddacb90da1d8786dd8ec4fd76bbfa404eaef6 Patch Changed Reference Type https://git.kernel.org/stable/c/559ddacb90da1d8786dd8ec4fd76bbfa404eaef6 No Types Assigned https://git.kernel.org/stable/c/559ddacb90da1d8786dd8ec4fd76bbfa404eaef6 Patch Changed Reference Type https://git.kernel.org/stable/c/afba9d11320dad5ce222ac8964caf64b7b4bedb1 No Types Assigned https://git.kernel.org/stable/c/afba9d11320dad5ce222ac8964caf64b7b4bedb1 Patch Changed Reference Type https://git.kernel.org/stable/c/afba9d11320dad5ce222ac8964caf64b7b4bedb1 No Types Assigned https://git.kernel.org/stable/c/afba9d11320dad5ce222ac8964caf64b7b4bedb1 Patch Changed Reference Type https://git.kernel.org/stable/c/afbcad9ae7d6d11608399188f03a837451b6b3a1 No Types Assigned https://git.kernel.org/stable/c/afbcad9ae7d6d11608399188f03a837451b6b3a1 Patch Changed Reference Type https://git.kernel.org/stable/c/afbcad9ae7d6d11608399188f03a837451b6b3a1 No Types Assigned https://git.kernel.org/stable/c/afbcad9ae7d6d11608399188f03a837451b6b3a1 Patch Changed Reference Type https://git.kernel.org/stable/c/b4fbb89d722cbb16beaaea234b7230faaaf68c71 No Types Assigned https://git.kernel.org/stable/c/b4fbb89d722cbb16beaaea234b7230faaaf68c71 Patch Changed Reference Type https://git.kernel.org/stable/c/b4fbb89d722cbb16beaaea234b7230faaaf68c71 No Types Assigned https://git.kernel.org/stable/c/b4fbb89d722cbb16beaaea234b7230faaaf68c71 Patch Changed Reference Type https://git.kernel.org/stable/c/d033a555d9a1cf53dbf3301af7199cc4a4c8f537 No Types Assigned https://git.kernel.org/stable/c/d033a555d9a1cf53dbf3301af7199cc4a4c8f537 Patch Changed Reference Type https://git.kernel.org/stable/c/d033a555d9a1cf53dbf3301af7199cc4a4c8f537 No Types Assigned https://git.kernel.org/stable/c/d033a555d9a1cf53dbf3301af7199cc4a4c8f537 Patch Changed Reference Type https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html No Types Assigned https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html Mailing List Changed Reference Type https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html No Types Assigned https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html Mailing List -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/185eab30486ba3e7bf8b9c2e049c79a06ffd2bc1 Added Reference https://git.kernel.org/stable/c/2883940b19c38d5884c8626483811acf4d7e148f Added Reference https://git.kernel.org/stable/c/55583e899a5357308274601364741a83e78d6ac4 Added Reference https://git.kernel.org/stable/c/559ddacb90da1d8786dd8ec4fd76bbfa404eaef6 Added Reference https://git.kernel.org/stable/c/afba9d11320dad5ce222ac8964caf64b7b4bedb1 Added Reference https://git.kernel.org/stable/c/afbcad9ae7d6d11608399188f03a837451b6b3a1 Added Reference https://git.kernel.org/stable/c/b4fbb89d722cbb16beaaea234b7230faaaf68c71 Added Reference https://git.kernel.org/stable/c/d033a555d9a1cf53dbf3301af7199cc4a4c8f537 Added Reference https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html Added Reference https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Nov. 05, 2024
Action Type Old Value New Value Removed Reference kernel.org https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html Removed Reference kernel.org https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 27, 2024
Action Type Old Value New Value Added Reference kernel.org https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html [No types assigned] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 25, 2024
Action Type Old Value New Value Added Reference kernel.org https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html [No types assigned] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 29, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Apr. 03, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: ext4: fix double-free of blocks due to wrong extents moved_len In ext4_move_extents(), moved_len is only updated when all moves are successfully executed, and only discards orig_inode and donor_inode preallocations when moved_len is not zero. When the loop fails to exit after successfully moving some extents, moved_len is not updated and remains at 0, so it does not discard the preallocations. If the moved extents overlap with the preallocated extents, the overlapped extents are freed twice in ext4_mb_release_inode_pa() and ext4_process_freed_data() (as described in commit 94d7c16cbbbd ("ext4: Fix double-free of blocks with EXT4_IOC_MOVE_EXT")), and bb_free is incremented twice. Hence when trim is executed, a zero-division bug is triggered in mb_update_avg_fragment_size() because bb_free is not zero and bb_fragments is zero. Therefore, update move_len after each extent move to avoid the issue. Added Reference kernel.org https://git.kernel.org/stable/c/b4fbb89d722cbb16beaaea234b7230faaaf68c71 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/afbcad9ae7d6d11608399188f03a837451b6b3a1 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/d033a555d9a1cf53dbf3301af7199cc4a4c8f537 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/afba9d11320dad5ce222ac8964caf64b7b4bedb1 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/185eab30486ba3e7bf8b9c2e049c79a06ffd2bc1 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/2883940b19c38d5884c8626483811acf4d7e148f [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/559ddacb90da1d8786dd8ec4fd76bbfa404eaef6 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/55583e899a5357308274601364741a83e78d6ac4 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-26704 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-26704
weaknesses.