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CVE-2024-56584· NVD / CVE Program· CNA Linux

io_uring/tctx: work around xa_store() allocation error issue

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.23% (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 3a84fa784710990964c1e35df743851ab2863898, 42882b583095dcf747da6e3af1daeff40e27033e, 7eb75ce7527129d7f1fee6951566af409a37a1c4.

Low priority for now. Upgrade to Linux Linux 3a84fa784710990964c1e35df743851ab2863898, 42882b583095dcf747da6e3af1daeff40e27033e, 7eb75ce7527129d7f1fee6951566af409a37a1c4 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: io_uring/tctx: work around xa_store() allocation error issue syzbot triggered the following WARN_ON: WARNING: CPU: 0 PID: 16 at io_uring/tctx.c:51 __io_uring_free+0xfa/0x140 io_uring/tctx.c:51 which is the WARN_ON_ONCE(!xa_empty(&tctx->xa)); sanity check in __io_uring_free() when a io_uring_task is going through its final put. The syzbot test case includes injecting memory allocation failures, and it very much looks like xa_store() can fail one of its memory allocations and end up with ->head being non-NULL even though no entries exist in the xarray. Until this issue gets sorted out, work around it by attempting to iterate entries in our xarray, and WARN_ON_ONCE() if one is found.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Dec 27, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 13th percentile

Report tools

JSON

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%

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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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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.

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Affected 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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.1 and later · before 6.1.120
  • linux linux kernel6.2 and later · before 6.6.66
  • linux linux kernel6.7 and later · before 6.12.5

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

    • 5.1affected
    • 2b188cc1bb857a9d4701ae59aa7768b5124e262e and later · before e05c070b401f6365c503e2b59f091331965c4fb9affected · git
    • 2b188cc1bb857a9d4701ae59aa7768b5124e262e and later · before 3a84fa784710990964c1e35df743851ab2863898affected · git
    • 2b188cc1bb857a9d4701ae59aa7768b5124e262e and later · before 94ad56f61b873ffeebcc620d451eacfbdf9d40f0affected · git
    • 2b188cc1bb857a9d4701ae59aa7768b5124e262e and later · before 42882b583095dcf747da6e3af1daeff40e27033eaffected · git
    • 2b188cc1bb857a9d4701ae59aa7768b5124e262e and later · before d5b2ddf1f90c7248eff9630b95895c8950f2f36daffected · git
    • 2b188cc1bb857a9d4701ae59aa7768b5124e262e and later · before 7eb75ce7527129d7f1fee6951566af409a37a1c4affected · git
    • before 5.1not affected · semver
    • 5.10.253 and later · up to and including 5.10.*not affected · semver
    • 5.15.203 and later · up to and including 5.15.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.123-16.1.123-1
Debian:13linuxbefore 6.12.5-16.12.5-1

Same product

linux: all records

Other 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 KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now
  • 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 haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2024-56582Dec 27, 2024 · btrfs: fix use-after-free in btrfs_encoded_read_endio()
    31Monitor
  • ← EarlierCVE-2024-56583Dec 27, 2024 · sched/deadline: Fix warning in migrate_enable for boosted tasks
    22Monitor
  • Later →CVE-2024-56585Dec 27, 2024 · LoongArch: Fix sleeping in atomic context for PREEMPT_RT
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux3a84fa784710990964c1e35df743851ab2863898Vendor (CNA)
Linux Linux42882b583095dcf747da6e3af1daeff40e27033eVendor (CNA)
Linux Linux7eb75ce7527129d7f1fee6951566af409a37a1c4Vendor (CNA)
Linux Linux94ad56f61b873ffeebcc620d451eacfbdf9d40f0Vendor (CNA)
Linux Linuxd5b2ddf1f90c7248eff9630b95895c8950f2f36dVendor (CNA)
Linux Linuxe05c070b401f6365c503e2b59f091331965c4fb9Vendor (CNA)
debian:linux6.1.123-1 · Debian:12Package 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.

EPSS, last 120 days

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 researchers

Finders, 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-2021-47137277 days apartnet: lantiq: fix memory corruption in RX ring
    39Monitor
  • CVE-2024-35969221 days apartipv6: fix race condition between ipv6_get_ifaddr and ipv6_del_addr
    35Monitor
  • CVE-2024-34027186 days apartf2fs: compress: fix to cover {reserve,release}_compress_blocks() w/ cp_rwsem lock
    31Monitor
  • CVE-2021-47551217 days apartdrm/amd/amdkfd: Fix kernel panic when reset failed and been triggered again
    31Monitor
  • CVE-2026-43329497 days apartnetfilter: flowtable: strictly check for maximum number of actions
    31Monitor
  • CVE-2021-47130287 days apartnvmet: fix freeing unallocated p2pmem
    30Monitor

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-770 · Allocation of Resources Without Limits or Throttling

CVSS 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.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records