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NVD / CVE Program· CNA Linux

CVE-2026-74426: afs: fix NULL pointer dereference in afs_get_tree()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.22% (FIRST EPSS).
  • Fixed version: Linux Linux 0b70716081c6462be9b2928ad736d0d527b09678, 23b3d457d8387bcb2a61063a9e520063ada9335f, 67fb48c4a0874953212321cd5d57fdb4900dbc31.

Low priority for now. Upgrade to Linux Linux 0b70716081c6462be9b2928ad736d0d527b09678, 23b3d457d8387bcb2a61063a9e520063ada9335f, 67fb48c4a0874953212321cd5d57fdb4900dbc31 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: afs: fix NULL pointer dereference in afs_get_tree() afs_alloc_sbi() uses kzalloc for memory allocation. And, if ctx->dyn_root is not null, as->cell and as->volume are null. In trace_afs_get_tree() they are dereferenced. KASAN error message: KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 2 PID: 18478 Comm: syz-executor.7 Not tainted 5.10.246-syzkaller #0 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:perf_trace_afs_get_tree+0x1d9/0x550 include/trace/events/afs.h:1365 Call Trace: trace_afs_get_tree include/trace/events/afs.h:1365 [inline] afs_get_tree+0x922/0x1350 fs/afs/super.c:599 vfs_get_tree+0x8e/0x300 fs/super.c:1572 do_new_mount fs/namespace.c:3011 [inline] path_mount+0x14a5/0x2220 fs/namespace.c:3341 do_mount fs/namespace.c:3354 [inline] __do_sys_mount fs/namespace.c:3562 [inline] __se_sys_mount fs/namespace.c:3539 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3539 do_syscall_64+0x33/0x50 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

—No exploit Fix available
Published
Aug 15, 2026
Updated
Aug 17, 2026
EPSS
0.2% · 12th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

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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.

—

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

    • 5.2affected
    • 80548b03991f58758a336424a90bf9f988e3b077 and later · before 67fb48c4a0874953212321cd5d57fdb4900dbc31affected · git
    • 80548b03991f58758a336424a90bf9f988e3b077 and later · before d648cc2069eb081707c061849046d909f57c78b1affected · git
    • 80548b03991f58758a336424a90bf9f988e3b077 and later · before d5b17474feed3c30991f07affa2473adbad95055affected · git
    • 80548b03991f58758a336424a90bf9f988e3b077 and later · before 867b3ea146a041023bfcd258e6db516b1bb28f19affected · git
    • 80548b03991f58758a336424a90bf9f988e3b077 and later · before ea19edf71721cd42f923e3c70f4ff995b422fe3baffected · git
    • 80548b03991f58758a336424a90bf9f988e3b077 and later · before 23b3d457d8387bcb2a61063a9e520063ada9335faffected · git
    • 80548b03991f58758a336424a90bf9f988e3b077 and later · before 70b2842734d831c908474779bb8a76daf55f782caffected · git
    • 80548b03991f58758a336424a90bf9f988e3b077 and later · before 0b70716081c6462be9b2928ad736d0d527b09678affected · git
    • before 5.2not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-74423Aug 15, 2026 · accel/amdxdna: Fix leak when pinning ubuf pages
    0Monitor
  • ← EarlierCVE-2026-74425Aug 15, 2026 · afs: handle CB.InitCallBackState3 requests without a server record
    30Monitor
  • Later →CVE-2026-74428Aug 15, 2026 · rxrpc: Fix double unlock in rxrpc_recvmsg()
    39Monitor

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 Linux0b70716081c6462be9b2928ad736d0d527b09678Vendor (CNA)
Linux Linux23b3d457d8387bcb2a61063a9e520063ada9335fVendor (CNA)
Linux Linux67fb48c4a0874953212321cd5d57fdb4900dbc31Vendor (CNA)
Linux Linux70b2842734d831c908474779bb8a76daf55f782cVendor (CNA)
Linux Linux867b3ea146a041023bfcd258e6db516b1bb28f19Vendor (CNA)
Linux Linuxd5b17474feed3c30991f07affa2473adbad95055Vendor (CNA)
Linux Linuxd648cc2069eb081707c061849046d909f57c78b1Vendor (CNA)
Linux Linuxea19edf71721cd42f923e3c70f4ff995b422fe3bVendor (CNA)
debian:linux6.1.180-1 · 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.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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✗ → ✓

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References

Show all references (7 more)

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

All records