xfs: don't walk off the end of a directory data block
In the Linux kernel, the following vulnerability has been resolved: xfs: don't walk off the end of a directory data block This adds sanity checks for xfs_dir2_data_unused and xfs_dir2_data_entry to make sure don't stray beyond valid memory region. Before patching, the loop simply checks that the start offset of the dup and dep is within the range. So in a crafted image, if last entry is xfs_dir2_data_unused, we can change dup->length to dup->length-1 and leave 1 byte of space. In the next traversal, this space will be considered as dup or dep. We may encounter an out of bound read when accessing the fixed members. In the patch, we make sure that the remaining bytes large enough to hold an unused entry before accessing xfs_dir2_data_unused and xfs_dir2_data_unused is XFS_DIR2_DATA_ALIGN byte aligned. We also make sure that the remaining bytes large enough to hold a dirent with a single-byte name before accessing xfs_dir2_data_entry.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Jul 29, 2024
- Updated
- Jun 17, 2026
- EPSS
- 0.2% · 11th percentile
- CWE
- CWE-125
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Report tools
Action score
28
Monitor
Low priority for now.
- CVSS
- 28 / 40 · 7.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Affected systems
| 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 kernelbefore 6.1.142
- linux linux kernel6.2 and later · before 6.6.68
- linux linux kernel6.7 and later · before 6.11
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
- 3.8affected
- 82025d7f79148fe66a1594a0ebe4ab38152cf9e6 and later · before b0932e4f9da85349d1c8f2a77d2a7a7163b8511daffected · git
- 82025d7f79148fe66a1594a0ebe4ab38152cf9e6 and later · before ca96d83c93071f95cf962ce92406621a472df31baffected · git
- 82025d7f79148fe66a1594a0ebe4ab38152cf9e6 and later · before 0c7fcdb6d06cdf8b19b57c17605215b06afa864aaffected · git
- before 3.8not affected · semver
- 6.1.142 and later · up to and including 6.1.*not affected · semver
- 6.6.68 and later · up to and including 6.6.*not affected · semver
- 6.11 and laternot affected · original_commit_for_fix
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:9 | bpftool | before 7.3.0-427.42.1.el9_4 | 7.3.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-core | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-debug | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-debug-core | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-debug-devel | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-debug-devel-matched | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-debug-modules | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-debug-modules-core | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-debug-modules-extra | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-devel | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-devel-matched | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-modules | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-modules-core | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-modules-extra | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-abi-stablelists | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-core | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-cross-headers | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-debug | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-debug-core | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-debug-devel | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-debug-devel-matched | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-debug-modules | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
+96
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
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
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 | 0c7fcdb6d06cdf8b19b57c17605215b06afa864a | Vendor (CNA) |
| Linux Linux | b0932e4f9da85349d1c8f2a77d2a7a7163b8511d | Vendor (CNA) |
| Linux Linux | ca96d83c93071f95cf962ce92406621a472df31b | Vendor (CNA) |
| almalinux:bpftool | 7.3.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-core | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-core | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-devel | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-devel-matched | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules-core | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules-extra | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-devel | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| debian:linux | 6.1.147-1 · Debian:12 | Package registry (OSV) |
| debian:linux-6.1 | 6.1.153-1~deb11u1 · Debian:11 | Package registry (OSV) |
| red hat:bpftool-debuginfo | 0:7.3.0-427.42.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-debuginfo | 0:5.14.0-427.42.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-devel | 0:5.14.0-427.42.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-devel-matched | 0:5.14.0-427.42.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debuginfo | 0:5.14.0-427.42.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-devel | 0:5.14.0-427.42.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-devel-matched | 0:5.14.0-427.42.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debug-debuginfo | 0:5.14.0-427.42.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debug-devel | 0:5.14.0-427.42.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debug-devel-matched | 0:5.14.0-427.42.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debuginfo | 0:5.14.0-427.42.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debuginfo-common-aarch64 | 0:5.14.0-427.42.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| rocky linux:kernel | 0:5.14.0-427.42.1.el9_4 · Rocky Linux:9 | Package registry (OSV) |
+4
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
- none
- 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
- None
- Availability impact
- High
Weakness class (CWE)
CWE-125 · Out-of-bounds ReadCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/0c7fcdb6d06cdf8b19b57c17605215b06afa864a
- git.kernel.org/stable/c/b0932e4f9da85349d1c8f2a77d2a7a7163b8511d
- git.kernel.org/stable/c/ca96d83c93071f95cf962ce92406621a472df31b
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.