aio: fix mremap after fork null-deref
In the Linux kernel, the following vulnerability has been resolved: aio: fix mremap after fork null-deref Commit e4a0d3e720e7 ("aio: Make it possible to remap aio ring") introduced a null-deref if mremap is called on an old aio mapping after fork as mm->ioctx_table will be set to NULL. [jmoyer@redhat.com: fix 80 column issue]
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
- Apr 26, 2024
- Updated
- Jun 17, 2026
- EPSS
- 0.2% · 13th percentile
- CWE
- CWE-476
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Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 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 kernel3.19 and later · before 4.14.306
- linux linux kernel4.15 and later · before 4.19.273
- linux linux kernel4.20 and later · before 5.4.232
- linux linux kernel5.5 and later · before 5.10.169
- linux linux kernel5.11 and later · before 5.15.95
- linux linux kernel5.16 and later · before 6.1.13
- linux linux kernel6.2
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
- 3.19affected
- e4a0d3e720e7e508749c1439b5ba3aff56c92976 and later · before 808f1e4b5723ae4eda724d2ad6f6638905eefd95affected · git
- e4a0d3e720e7e508749c1439b5ba3aff56c92976 and later · before d8dca1bfe9adcae38b35add64977818c0c13dd22affected · git
- e4a0d3e720e7e508749c1439b5ba3aff56c92976 and later · before 4326d0080f7e84fba775da41d158f46cf9d3f1c2affected · git
- e4a0d3e720e7e508749c1439b5ba3aff56c92976 and later · before c261f798f7baa8080cf0214081d43d5f86bb073faffected · git
- e4a0d3e720e7e508749c1439b5ba3aff56c92976 and later · before 178993157e8c50aef7f35d7d6d3b44bb428199e1affected · git
- e4a0d3e720e7e508749c1439b5ba3aff56c92976 and later · before af126acf01a12bdb04986fd26fc2eb3b40249e0daffected · git
- e4a0d3e720e7e508749c1439b5ba3aff56c92976 and later · before 81e9d6f8647650a7bead74c5f926e29970e834d1affected · git
- before 3.19not affected · semver
- 4.14.306 and later · up to and including 4.14.*not affected · semver
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 6.1.15-1 | 6.1.15-1 |
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 | 178993157e8c50aef7f35d7d6d3b44bb428199e1 | Vendor (CNA) |
| Linux Linux | 4326d0080f7e84fba775da41d158f46cf9d3f1c2 | Vendor (CNA) |
| Linux Linux | 808f1e4b5723ae4eda724d2ad6f6638905eefd95 | Vendor (CNA) |
| Linux Linux | 81e9d6f8647650a7bead74c5f926e29970e834d1 | Vendor (CNA) |
| Linux Linux | af126acf01a12bdb04986fd26fc2eb3b40249e0d | Vendor (CNA) |
| Linux Linux | c261f798f7baa8080cf0214081d43d5f86bb073f | Vendor (CNA) |
| Linux Linux | d8dca1bfe9adcae38b35add64977818c0c13dd22 | Vendor (CNA) |
| debian:linux | 6.1.15-1 · Debian:12 | 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
- none
- 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
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-476 · NULL Pointer DereferenceCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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/178993157e8c50aef7f35d7d6d3b44bb428199e1
- git.kernel.org/stable/c/4326d0080f7e84fba775da41d158f46cf9d3f1c2
- git.kernel.org/stable/c/808f1e4b5723ae4eda724d2ad6f6638905eefd95
- git.kernel.org/stable/c/81e9d6f8647650a7bead74c5f926e29970e834d1
- git.kernel.org/stable/c/af126acf01a12bdb04986fd26fc2eb3b40249e0d
- git.kernel.org/stable/c/c261f798f7baa8080cf0214081d43d5f86bb073f
- git.kernel.org/stable/c/d8dca1bfe9adcae38b35add64977818c0c13dd22
Vendor advisories and official records. Exploit/PoC links are deliberately left out.