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NVD / CVE Program· CNA Linux

CVE-2022-49877: bpf, sockmap: Fix the sk->sk_forward_alloc warning of sk_stream_kill_queues

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: 0.20% (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 14e8bc3bf7bd6af64d7538a0684c8238d96cdfd7, 5.10.155, 5.15.79.

Low priority for now. Upgrade to Linux Linux 14e8bc3bf7bd6af64d7538a0684c8238d96cdfd7, 5.10.155, 5.15.79 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: bpf, sockmap: Fix the sk->sk_forward_alloc warning of sk_stream_kill_queues When running `test_sockmap` selftests, the following warning appears: WARNING: CPU: 2 PID: 197 at net/core/stream.c:205 sk_stream_kill_queues+0xd3/0xf0 Call Trace: <TASK> inet_csk_destroy_sock+0x55/0x110 tcp_rcv_state_process+0xd28/0x1380 ? tcp_v4_do_rcv+0x77/0x2c0 tcp_v4_do_rcv+0x77/0x2c0 __release_sock+0x106/0x130 __tcp_close+0x1a7/0x4e0 tcp_close+0x20/0x70 inet_release+0x3c/0x80 __sock_release+0x3a/0xb0 sock_close+0x14/0x20 __fput+0xa3/0x260 task_work_run+0x59/0xb0 exit_to_user_mode_prepare+0x1b3/0x1c0 syscall_exit_to_user_mode+0x19/0x50 do_syscall_64+0x48/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae The root case is in commit 84472b436e76 ("bpf, sockmap: Fix more uncharged while msg has more_data"), where I used msg->sg.size to replace the tosend, causing breakage: if (msg->apply_bytes && msg->apply_bytes < tosend) tosend = psock->apply_bytes;

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 1, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 10th percentile
CWE
—

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

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  • 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 kernel5.4.189 and later · before 5.4.225
  • linux linux kernel5.10.110 and later · before 5.10.155
  • linux linux kernel5.15.33 and later · before 5.15.79
  • linux linux kernel5.16.19 and later · before 5.17
  • linux linux kernel5.17.2 and later · before 6.0.9
  • linux linux kernel6.1

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

    • 87d532d41ef937e16f61b3d2094f3a2ac49be365, abb4caa477a5450817d2aa1198edce66450aecf8, 5.18affected
    • 244ce90c8d0bd10ebf957da02c6f3fcd5d920bdf and later · before d975bec1eaeb52341acc9273db79ddb078220399affected · git
    • 7b812a369e6416ab06d83cdd39d8e3f752781dd0 and later · before cc21dc48a78cc9e5af9a4d039cd456446a6e73ffaffected · git
    • 168ff181f5b6e7fce684c98a30d35da1dbf8f82a and later · before 95adbd2ac8de82e43fd6b347e7e1b47f74dc1abbaffected · git
    • 84472b436e760ba439e1969a9e3c5ae7c86de39d and later · before 14e8bc3bf7bd6af64d7538a0684c8238d96cdfd7affected · git
    • 84472b436e760ba439e1969a9e3c5ae7c86de39d and later · before 8ec95b94716a1e4d126edc3fb2bc426a717e2dbaaffected · git
    • 5.4.189 and later · before 5.4.225affected · semver
    • 5.10.110 and later · before 5.10.155affected · semver
    • 5.15.33 and later · before 5.15.79affected · semver
    • 5.16.19 and later · before 5.17affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.0.10-16.0.10-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • 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

Published before and after this one in the same product

  • ← EarlierCVE-2022-49875May 1, 2025 · bpftool: Fix NULL pointer dereference when pin {PROG, MAP, LINK} without FILE
    22Monitor
  • ← EarlierCVE-2022-49876May 1, 2025 · wifi: mac80211: fix general-protection-fault in ieee80211_subif_start_xmit()
    22Monitor
  • Later →CVE-2022-49878May 1, 2025 · bpf, verifier: Fix memory leak in array reallocation for stack state
    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 Linux14e8bc3bf7bd6af64d7538a0684c8238d96cdfd7Vendor (CNA)
Linux Linux5.10.155Vendor (CNA)
Linux Linux5.15.79Vendor (CNA)
Linux Linux5.17Vendor (CNA)
Linux Linux5.18Vendor (CNA)
Linux Linux5.4.225Vendor (CNA)
Linux Linux8ec95b94716a1e4d126edc3fb2bc426a717e2dbaVendor (CNA)
Linux Linux95adbd2ac8de82e43fd6b347e7e1b47f74dc1abbVendor (CNA)
Linux Linuxcc21dc48a78cc9e5af9a4d039cd456446a6e73ffVendor (CNA)
Linux Linuxd975bec1eaeb52341acc9273db79ddb078220399Vendor (CNA)
debian:linux6.0.10-1 · 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.

No history yet (it accumulates with the daily EPSS job).

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.

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)

—

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.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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

References

Show all references (4 more)

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

All records