hfsplus: don't query the device logical block size multiple times
Noroxi assessment
Priority: Monitor (action score 31/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.24% (FIRST EPSS).
- Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: Linux Linux 06cbfbb13ac88f4154c2eb4bc4176f9d10139847, 1c82587cb57687de3f18ab4b98a8850c789bedcf, 21900e8478126ff6afe3b66679f676e74d1f8830; cbl2 kernel 5.15.173.1-2 on CBL Mariner 2.0 5.15.176.3-3.
Low priority for now. Upgrade to Linux Linux 06cbfbb13ac88f4154c2eb4bc4176f9d10139847, 1c82587cb57687de3f18ab4b98a8850c789bedcf, 21900e8478126ff6afe3b66679f676e74d1f8830; cbl2 kernel 5.15.173.1-2 on CBL Mariner 2.0 5.15.176.3-3 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
In the Linux kernel, the following vulnerability has been resolved: hfsplus: don't query the device logical block size multiple times Devices block sizes may change. One of these cases is a loop device by using ioctl LOOP_SET_BLOCK_SIZE. While this may cause other issues like IO being rejected, in the case of hfsplus, it will allocate a block by using that size and potentially write out-of-bounds when hfsplus_read_wrapper calls hfsplus_submit_bio and the latter function reads a different io_size. Using a new min_io_size initally set to sb_min_blocksize works for the purposes of the original fix, since it will be set to the max between HFSPLUS_SECTOR_SIZE and the first seen logical block size. We still use the max between HFSPLUS_SECTOR_SIZE and min_io_size in case the latter is not initialized. Tested by mounting an hfsplus filesystem with loop block sizes 512, 1024 and 4096. The produced KASAN report before the fix looks like this: [ 419.944641] ================================================================== [ 419.945655] BUG: KASAN: slab-use-after-free in hfsplus_read_wrapper+0x659/0xa0a [ 419.946703] Read of size 2 at addr ffff88800721fc00 by task repro/10678 [ 419.947612] [ 419.947846] CPU: 0 UID: 0 PID: 10678 Comm: repro Not tainted 6.12.0-rc5-00008-gdf56e0f2f3ca #84 [ 419.949007] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014 [ 419.950035] Call Trace: [ 419.950384] <TASK> [ 419.950676] dump_stack_lvl+0x57/0x78 [ 419.951212] ? hfsplus_read_wrapper+0x659/0xa0a [ 419.951830] print_report+0x14c/0x49e [ 419.952361] ? __virt_addr_valid+0x267/0x278 [ 419.952979] ? kmem_cache_debug_flags+0xc/0x1d [ 419.953561] ? hfsplus_read_wrapper+0x659/0xa0a [ 419.954231] kasan_report+0x89/0xb0 [ 419.954748] ? hfsplus_read_wrapper+0x659/0xa0a [ 419.955367] hfsplus_read_wrapper+0x659/0xa0a [ 419.955948] ? __pfx_hfsplus_read_wrapper+0x10/0x10 [ 419.956618] ? do_raw_spin_unlock+0x59/0x1a9 [ 419.957214] ? _raw_spin_unlock+0x1a/0x2e [ 419.957772] hfsplus_fill_super+0x348/0x1590 [ 419.958355] ? hlock_class+0x4c/0x109 [ 419.958867] ? __pfx_hfsplus_fill_super+0x10/0x10 [ 419.959499] ? __pfx_string+0x10/0x10 [ 419.960006] ? lock_acquire+0x3e2/0x454 [ 419.960532] ? bdev_name.constprop.0+0xce/0x243 [ 419.961129] ? __pfx_bdev_name.constprop.0+0x10/0x10 [ 419.961799] ? pointer+0x3f0/0x62f [ 419.962277] ? __pfx_pointer+0x10/0x10 [ 419.962761] ? vsnprintf+0x6c4/0xfba [ 419.963178] ? __pfx_vsnprintf+0x10/0x10 [ 419.963621] ? setup_bdev_super+0x376/0x3b3 [ 419.964029] ? snprintf+0x9d/0xd2 [ 419.964344] ? __pfx_snprintf+0x10/0x10 [ 419.964675] ? lock_acquired+0x45c/0x5e9 [ 419.965016] ? set_blocksize+0x139/0x1c1 [ 419.965381] ? sb_set_blocksize+0x6d/0xae [ 419.965742] ? __pfx_hfsplus_fill_super+0x10/0x10 [ 419.966179] mount_bdev+0x12f/0x1bf [ 419.966512] ? __pfx_mount_bdev+0x10/0x10 [ 419.966886] ? vfs_parse_fs_string+0xce/0x111 [ 419.967293] ? __pfx_vfs_parse_fs_string+0x10/0x10 [ 419.967702] ? __pfx_hfsplus_mount+0x10/0x10 [ 419.968073] legacy_get_tree+0x104/0x178 [ 419.968414] vfs_get_tree+0x86/0x296 [ 419.968751] path_mount+0xba3/0xd0b [ 419.969157] ? __pfx_path_mount+0x10/0x10 [ 419.969594] ? kmem_cache_free+0x1e2/0x260 [ 419.970311] do_mount+0x99/0xe0 [ 419.970630] ? __pfx_do_mount+0x10/0x10 [ 419.971008] __do_sys_mount+0x199/0x1c9 [ 419.971397] do_syscall_64+0xd0/0x135 [ 419.971761] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 419.972233] RIP: 0033:0x7c3cb812972e [ 419.972564] Code: 48 8b 0d f5 46 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c2 46 0d 00 f7 d8 64 89 01 48 [ 419.974371] RSP: 002b:00007ffe30632548 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 419.975048] RAX: ffffffffffffffda RBX: 00007ffe306328d8 RCX: 00007c3cb812972e [ 419.975701] RDX: 0000000020000000 RSI: 0000000020000c80 RDI: ---truncated---
- Published
- Dec 27, 2024
- Updated
- Aug 5, 2026
- EPSS
- 0.2% · 15th percentile
- CWE
- CWE-787
Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.8
- CNA · Linux
- 7.8
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel3.0.8 and later · before 4.19.325
- linux linux kernel4.20 and later · before 5.4.287
- linux linux kernel5.5 and later · before 5.10.231
- linux linux kernel5.11 and later · before 5.15.174
- linux linux kernel5.16 and later · before 6.1.120
- linux linux kernel6.2 and later · before 6.6.64
- linux linux kernel6.7 and later · before 6.11.11
- linux linux kernel6.12 and later · before 6.12.2
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- c53c89aba3ebdfc3e9acdb18bb5ee9d2f8a328d0, 3.1affected
- 6596528e391ad978a6a120142cba97a1d7324cb6 and later · before baccb5e12577b7a9eff54ffba301fdaa0f3ee5a8affected · git
- 6596528e391ad978a6a120142cba97a1d7324cb6 and later · before f57725bcc5816425e25218fdf5fb6923bc578cdfaffected · git
- 6596528e391ad978a6a120142cba97a1d7324cb6 and later · before e8a2b1c1c2ea85e9a5a2d0c5a5a7e7c639feb866affected · git
- 6596528e391ad978a6a120142cba97a1d7324cb6 and later · before 06cbfbb13ac88f4154c2eb4bc4176f9d10139847affected · git
- 6596528e391ad978a6a120142cba97a1d7324cb6 and later · before 3d7bda75e1a6239db053c73acde17ca146317824affected · git
- 6596528e391ad978a6a120142cba97a1d7324cb6 and later · before 21900e8478126ff6afe3b66679f676e74d1f8830affected · git
- 6596528e391ad978a6a120142cba97a1d7324cb6 and later · before 2667c9b7b76efcbc7adbfea249892f20c313b0daaffected · git
- 6596528e391ad978a6a120142cba97a1d7324cb6 and later · before bfeecda050aa9376f642d5b2a71c4112cc6c8216affected · git
- 6596528e391ad978a6a120142cba97a1d7324cb6 and later · before 1c82587cb57687de3f18ab4b98a8850c789bedcfaffected · git
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.123-1 | 6.1.123-1 |
| Debian:13 | linux | before 6.12.3-1 | 6.12.3-1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-64kb | before 5.3.18-150300.59.188.1 | 5.3.18-150300.59.188.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-64kb | before 5.3.18-150300.59.198.1 | 5.3.18-150300.59.198.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-default-base | before 5.3.18-150300.59.188.1.150300.18.111.1 | 5.3.18-150300.59.188.1.150300.18.111.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-default-base | before 5.3.18-150300.59.198.1.150300.18.118.1 | 5.3.18-150300.59.198.1.150300.18.118.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-docs | before 5.3.18-150300.59.188.1 | 5.3.18-150300.59.188.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-docs | before 5.3.18-150300.59.198.1 | 5.3.18-150300.59.198.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-obs-build | before 5.3.18-150300.59.188.1 | 5.3.18-150300.59.188.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-obs-build | before 5.3.18-150300.59.198.1 | 5.3.18-150300.59.198.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-preempt | before 5.3.18-150300.59.188.1 | 5.3.18-150300.59.188.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-preempt | before 5.3.18-150300.59.198.1 | 5.3.18-150300.59.198.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-source | before 5.3.18-150300.59.188.1 | 5.3.18-150300.59.188.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-source | before 5.3.18-150300.59.198.1 | 5.3.18-150300.59.198.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-syms | before 5.3.18-150300.59.198.1 | 5.3.18-150300.59.198.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-syms | before 5.3.18-150300.59.188.1 | 5.3.18-150300.59.188.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-64kb | before 5.14.21-150400.24.147.1 | 5.14.21-150400.24.147.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-64kb | before 5.14.21-150400.24.153.1 | 5.14.21-150400.24.153.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-docs | before 5.14.21-150400.24.153.1 | 5.14.21-150400.24.153.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-docs | before 5.14.21-150400.24.147.1 | 5.14.21-150400.24.147.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-obs-build | before 5.14.21-150400.24.153.1 | 5.14.21-150400.24.153.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-obs-build | before 5.14.21-150400.24.147.1 | 5.14.21-150400.24.147.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-source | before 5.14.21-150400.24.153.1 | 5.14.21-150400.24.153.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-source | before 5.14.21-150400.24.147.1 | 5.14.21-150400.24.147.1 |
+45
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
Published before and after this one in the same product
- ← EarlierCVE-2024-56546Dec 27, 2024 · drivers: soc: xilinx: add the missing kfree in xlnx_add_cb_for_suspend()22Monitor
- ← EarlierCVE-2024-56547Dec 27, 2024 · rcu/nocb: Fix missed RCU barrier on deoffloading18Monitor
- Later →CVE-2024-56550Dec 27, 2024 · s390/stacktrace: Use break instead of return statement22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 06cbfbb13ac88f4154c2eb4bc4176f9d10139847 | Vendor (CNA) |
| Linux Linux | 1c82587cb57687de3f18ab4b98a8850c789bedcf | Vendor (CNA) |
| Linux Linux | 21900e8478126ff6afe3b66679f676e74d1f8830 | Vendor (CNA) |
| Linux Linux | 2667c9b7b76efcbc7adbfea249892f20c313b0da | Vendor (CNA) |
| Linux Linux | 3.1 | Vendor (CNA) |
| Linux Linux | 3d7bda75e1a6239db053c73acde17ca146317824 | Vendor (CNA) |
| Linux Linux | baccb5e12577b7a9eff54ffba301fdaa0f3ee5a8 | Vendor (CNA) |
| Linux Linux | bfeecda050aa9376f642d5b2a71c4112cc6c8216 | Vendor (CNA) |
| Linux Linux | e8a2b1c1c2ea85e9a5a2d0c5a5a7e7c639feb866 | Vendor (CNA) |
| Linux Linux | f57725bcc5816425e25218fdf5fb6923bc578cdf | Vendor (CNA) |
| cbl2 kernel 5.15.173.1-2 on CBL Mariner 2.0 | 5.15.176.3-3 · CBL-Mariner Releases | Microsoft (MSRC) |
| debian:linux | 6.1.123-1 · Debian:12 | Package registry (OSV) |
| suse:kernel-64kb | 5.3.18-150300.59.188.1 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | Package registry (OSV) |
| suse:kernel-default | 3.0.101-108.174.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE | Package registry (OSV) |
| suse:kernel-default-base | 5.3.18-150300.59.188.1.150300.18.111.1 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | Package registry (OSV) |
| suse:kernel-docs | 5.3.18-150300.59.188.1 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | Package registry (OSV) |
| suse:kernel-ec2 | 3.0.101-108.174.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP3_Update_52 | 1-150300.7.3.1 · SUSE:Linux Enterprise Live Patching 15 SP3 | Package registry (OSV) |
| suse:kernel-obs-build | 5.3.18-150300.59.188.1 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | Package registry (OSV) |
| suse:kernel-preempt | 5.3.18-150300.59.188.1 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | Package registry (OSV) |
| suse:kernel-source | 3.0.101-108.174.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE | Package registry (OSV) |
| suse:kernel-syms | 3.0.101-108.174.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE | Package registry (OSV) |
| suse:kernel-trace | 3.0.101-108.174.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE | Package registry (OSV) |
| suse:kernel-xen | 3.0.101-108.174.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-787 · Out-of-bounds WriteCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (10 more)Show less
- git.kernel.org/stable/c/1c82587cb57687de3f18ab4b98a8850c789bedcf
- git.kernel.org/stable/c/21900e8478126ff6afe3b66679f676e74d1f8830
- git.kernel.org/stable/c/2667c9b7b76efcbc7adbfea249892f20c313b0da
- git.kernel.org/stable/c/3d7bda75e1a6239db053c73acde17ca146317824
- git.kernel.org/stable/c/baccb5e12577b7a9eff54ffba301fdaa0f3ee5a8
- git.kernel.org/stable/c/bfeecda050aa9376f642d5b2a71c4112cc6c8216
- git.kernel.org/stable/c/e8a2b1c1c2ea85e9a5a2d0c5a5a7e7c639feb866
- git.kernel.org/stable/c/f57725bcc5816425e25218fdf5fb6923bc578cdf
- lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- lists.debian.org/debian-lts-announce/2025/03/msg00002.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.