ocfs2: fix uninitialized value in ocfs2_file_read_iter()
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix uninitialized value in ocfs2_file_read_iter() Syzbot has reported the following KMSAN splat: BUG: KMSAN: uninit-value in ocfs2_file_read_iter+0x9a4/0xf80 ocfs2_file_read_iter+0x9a4/0xf80 __io_read+0x8d4/0x20f0 io_read+0x3e/0xf0 io_issue_sqe+0x42b/0x22c0 io_wq_submit_work+0xaf9/0xdc0 io_worker_handle_work+0xd13/0x2110 io_wq_worker+0x447/0x1410 ret_from_fork+0x6f/0x90 ret_from_fork_asm+0x1a/0x30 Uninit was created at: __alloc_pages_noprof+0x9a7/0xe00 alloc_pages_mpol_noprof+0x299/0x990 alloc_pages_noprof+0x1bf/0x1e0 allocate_slab+0x33a/0x1250 ___slab_alloc+0x12ef/0x35e0 kmem_cache_alloc_bulk_noprof+0x486/0x1330 __io_alloc_req_refill+0x84/0x560 io_submit_sqes+0x172f/0x2f30 __se_sys_io_uring_enter+0x406/0x41c0 __x64_sys_io_uring_enter+0x11f/0x1a0 x64_sys_call+0x2b54/0x3ba0 do_syscall_64+0xcd/0x1e0 entry_SYSCALL_64_after_hwframe+0x77/0x7f Since an instance of 'struct kiocb' may be passed from the block layer with 'private' field uninitialized, introduce 'ocfs2_iocb_init_rw_locked()' and use it from where 'ocfs2_dio_end_io()' might take care, i.e. in 'ocfs2_file_read_iter()' and 'ocfs2_file_write_iter()'.
Noroxi analysis
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We use this product, ask for help- Published
- Dec 24, 2024
- Updated
- Jun 17, 2026
- EPSS
- 0.2% · 13th percentile
- CWE
- CWE-908
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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 kernel2.6.22 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
- 2.6.22affected
- 7cdfc3a1c3971c9125c317cb8c2525745851798e and later · before 6c8f8d1e595dabd5389817f6d798cc8bd95c40abaffected · git
- 7cdfc3a1c3971c9125c317cb8c2525745851798e and later · before f4078ef38d3163e6be47403a619558b19c4bfccdaffected · git
- 7cdfc3a1c3971c9125c317cb8c2525745851798e and later · before 66b7ddd1804e2c4216dd7ead8eeb746cdbb3b62faffected · git
- 7cdfc3a1c3971c9125c317cb8c2525745851798e and later · before 8c966150d5abff58c3c2bdb9a6e63fd773782905affected · git
- 7cdfc3a1c3971c9125c317cb8c2525745851798e and later · before 83f8713a0ef1d55d6a287bcfadcaab8245ac5098affected · git
- 7cdfc3a1c3971c9125c317cb8c2525745851798e and later · before 8e0de82ed18ba0e71f817adbd81317fd1032ca5aaffected · git
- 7cdfc3a1c3971c9125c317cb8c2525745851798e and later · before 366c933c2ab34dd6551acc03b4872726b7605143affected · git
- 7cdfc3a1c3971c9125c317cb8c2525745851798e and later · before dc78efe556fed162d48736ef24066f42e463e27caffected · git
- 7cdfc3a1c3971c9125c317cb8c2525745851798e and later · before adc77b19f62d7e80f98400b2fca9d700d2afdd6faffected · 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 Live Patching 12 SP5 | kernel-default | before 4.12.14-122.247.1 | 4.12.14-122.247.1 |
| SUSE:Linux Enterprise Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_65 | before 1-8.3.1 | 1-8.3.1 |
| SUSE:Linux Enterprise Server 12 SP5-LTSS | kernel-source | before 4.12.14-122.247.1 | 4.12.14-122.247.1 |
| SUSE:Linux Enterprise Server 12 SP5-LTSS | kernel-syms | before 4.12.14-122.247.1 | 4.12.14-122.247.1 |
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 | 366c933c2ab34dd6551acc03b4872726b7605143 | Vendor (CNA) |
| Linux Linux | 66b7ddd1804e2c4216dd7ead8eeb746cdbb3b62f | Vendor (CNA) |
| Linux Linux | 6c8f8d1e595dabd5389817f6d798cc8bd95c40ab | Vendor (CNA) |
| Linux Linux | 83f8713a0ef1d55d6a287bcfadcaab8245ac5098 | Vendor (CNA) |
| Linux Linux | 8c966150d5abff58c3c2bdb9a6e63fd773782905 | Vendor (CNA) |
| Linux Linux | 8e0de82ed18ba0e71f817adbd81317fd1032ca5a | Vendor (CNA) |
| Linux Linux | adc77b19f62d7e80f98400b2fca9d700d2afdd6f | Vendor (CNA) |
| Linux Linux | dc78efe556fed162d48736ef24066f42e463e27c | Vendor (CNA) |
| Linux Linux | f4078ef38d3163e6be47403a619558b19c4bfccd | Vendor (CNA) |
| debian:linux | 6.1.123-1 · Debian:12 | Package registry (OSV) |
| suse:kernel-default | 4.12.14-122.247.1 · SUSE:Linux Enterprise Live Patching 12 SP5 | Package registry (OSV) |
| suse:kernel-source | 4.12.14-122.247.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS | Package registry (OSV) |
| suse:kernel-syms | 4.12.14-122.247.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS | Package registry (OSV) |
| suse:kgraft-patch-SLE12-SP5_Update_65 | 1-8.3.1 · SUSE:Linux Enterprise Live Patching 12 SP5 | 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.
- CVE-2024-5030236 days apartHID: core: zero-initialize the report bufferKEV52Plan
- CVE-2024-4768564 days apartnetfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()36Monitor
- CVE-2026-43139498 days apartxfrm6: fix uninitialized saddr in xfrm6_get_saddr()34Monitor
- CVE-2026-43291500 days apartnet: nfc: nci: Fix parameter validation for packet data33Monitor
- CVE-2024-5014347 days apartudf: fix uninit-value use in udf_get_fileshortad31Monitor
- CVE-2024-36898208 days apartgpiolib: cdev: fix uninitialised kfifo31Monitor
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-908 · Use of Uninitialized ResourceCVSS 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.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/366c933c2ab34dd6551acc03b4872726b7605143
- git.kernel.org/stable/c/66b7ddd1804e2c4216dd7ead8eeb746cdbb3b62f
- git.kernel.org/stable/c/6c8f8d1e595dabd5389817f6d798cc8bd95c40ab
- git.kernel.org/stable/c/83f8713a0ef1d55d6a287bcfadcaab8245ac5098
- git.kernel.org/stable/c/8c966150d5abff58c3c2bdb9a6e63fd773782905
- git.kernel.org/stable/c/8e0de82ed18ba0e71f817adbd81317fd1032ca5a
- git.kernel.org/stable/c/adc77b19f62d7e80f98400b2fca9d700d2afdd6f
- git.kernel.org/stable/c/dc78efe556fed162d48736ef24066f42e463e27c
- git.kernel.org/stable/c/f4078ef38d3163e6be47403a619558b19c4bfccd
- 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.