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CVE-2022-49688· NVD / CVE Program· CNA Linux

afs: Fix dynamic root getattr

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: 0.29% (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 2b2bba96526f25f2eba74ecadb031de2e05a83ce, 4.19.250, 5.10.127.

Low priority for now. Upgrade to Linux Linux 2b2bba96526f25f2eba74ecadb031de2e05a83ce, 4.19.250, 5.10.127 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

In the Linux kernel, the following vulnerability has been resolved: afs: Fix dynamic root getattr The recent patch to make afs_getattr consult the server didn't account for the pseudo-inodes employed by the dynamic root-type afs superblock not having a volume or a server to access, and thus an oops occurs if such a directory is stat'd. Fix this by checking to see if the vnode->volume pointer actually points anywhere before following it in afs_getattr(). This can be tested by stat'ing a directory in /afs. It may be sufficient just to do "ls /afs" and the oops looks something like: BUG: kernel NULL pointer dereference, address: 0000000000000020 ... RIP: 0010:afs_getattr+0x8b/0x14b ... Call Trace: <TASK> vfs_statx+0x79/0xf5 vfs_fstatat+0x49/0x62

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 26, 2025
Updated
Jun 17, 2026
EPSS
0.3% · 21th 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 · 0.3%

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 kernel4.19.245 and later · before 4.19.250
  • linux linux kernel5.4.196 and later · before 5.4.202
  • linux linux kernel5.10.118 and later · before 5.10.127
  • linux linux kernel5.15.42 and later · before 5.15.51
  • linux linux kernel5.17.10 and later · before 5.18
  • linux linux kernel5.18.1 and later · before 5.18.8
  • linux linux kernel5.18
  • linux linux kernel5.19

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

    • 9e655a8b874d7c56e02938ddb221b16e293793df, 5.18affected
    • b76ea7c06b24dcf97ea3379b6957d5b99c346ea0 and later · before 65c24caf1b9f5b08397c6e805ec24ebc390c6e4daffected · git
    • dba1941f5bc3de6b460685155b89ae1182824fc8 and later · before e3a232e5767051483ffad4cef7d0a89d292a192baffected · git
    • 61a4cc41e5c1b77d05a12798f8032050aa75f3c8 and later · before 7b564e3254b7db5fbfbf11a824627a6c31b932b4affected · git
    • 94bf8bfb009fad247d02f12e4c443411c8445412 and later · before 2b2bba96526f25f2eba74ecadb031de2e05a83ceaffected · git
    • 2aeb8c86d49967552394d5e723f87454cb53f501 and later · before 7844ceada44eca740d31beb3d97b8511b1ca0a9baffected · git
    • 2aeb8c86d49967552394d5e723f87454cb53f501 and later · before cb78d1b5efffe4cf97e16766329dd7358aed3debaffected · git
    • 4.19.245 and later · before 4.19.250affected · semver
    • 5.4.196 and later · before 5.4.202affected · semver
    • 5.10.118 and later · before 5.10.127affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.18.14-15.18.14-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

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  • 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
  • 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 creKEV
    77This 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 addKEV
    77This 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 loKEV
    77This 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 / packageFixed versionSource
Linux Linux2b2bba96526f25f2eba74ecadb031de2e05a83ceVendor (CNA)
Linux Linux4.19.250Vendor (CNA)
Linux Linux5.10.127Vendor (CNA)
Linux Linux5.15.51Vendor (CNA)
Linux Linux5.18Vendor (CNA)
Linux Linux5.4.202Vendor (CNA)
Linux Linux65c24caf1b9f5b08397c6e805ec24ebc390c6e4dVendor (CNA)
Linux Linux7844ceada44eca740d31beb3d97b8511b1ca0a9bVendor (CNA)
Linux Linux7b564e3254b7db5fbfbf11a824627a6c31b932b4Vendor (CNA)
Linux Linuxcb78d1b5efffe4cf97e16766329dd7358aed3debVendor (CNA)
Linux Linuxe3a232e5767051483ffad4cef7d0a89d292a192bVendor (CNA)
debian:linux5.18.14-1 · 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.

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 Dereference

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 (5 more)

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

All records