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Review reviewHigh

CVE-2025-40349

Linux

In the Linux kernel, the following vulnerability has been resolved: hfs: validate record offset in hfsplus_bmap_alloc hfsplus_bmap_alloc can trigger a crash if a record offset or length is larger than node_size [ 15.264282] BUG: KASAN: slab-out-of-bounds in hfsplus_bmap_alloc+0x887/0x8b0 [ 15.265192] Read of size 8 at addr ffff8881085ca188 by task test/183 [ 15.265949] [ 15.266163] CPU: 0 UID: 0 PID: 183 Comm: test Not tainted 6.17.0-rc2-gc17b750b3ad9 #14 PREEMPT(voluntary) [ 15.266165] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 15.26...

CVSS
7.8
EPSS
0.14%
3.56% percentile
CISA KEV
Not listed
Published
2025.12.16
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.14%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: hfs: validate record offset in hfsplus_bmap_alloc hfsplus_bmap_alloc can trigger a crash if a record offset or length is larger than node_size [ 15.264282] BUG: KASAN: slab-out-of-bounds in hfsplus_bmap_alloc+0x887/0x8b0 [ 15.265192] Read of size 8 at addr ffff8881085ca188 by task test/183 [ 15.265949] [ 15.266163] CPU: 0 UID: 0 PID: 183 Comm: test Not tainted 6.17.0-rc2-gc17b750b3ad9 #14 PREEMPT(voluntary) [ 15.266165] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 15.26...

Affected product and versions

Product
Linux
Affected versions
>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f7d9f600c7c3ff5dab36181a388af55f2c95604c, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 40dfe7a4215a1f20842561ffaf5a6f83a987e75b, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 418e48cab99c52c1760636a4dbe464bf6db2018b, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0058d20d76182861dbdd8fd6e2dd8d18d6d3becf, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4f40a2b3969daf10dca4dea6f6dd0e813f79b227, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 17ed51cfce6c62cffb97059ef392ad2e0245806e, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 068a46df3e6acc68fb9db0a6313ab379a11ecd6f, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 738d5a51864ed8d7a68600b8c0c63fe6fe5c4f20, >= 2.6.12
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available