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NVD / CVE Program· CNA Linux

CVE-2023-54293: bcache: fixup btree_cache_wait list damage

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: 0.20% (FIRST EPSS).
  • Fixed version: Linux Linux 25ec4779d0fb3ed9cac1e4d9e0e4261b4a12f6ed, 2882a4c4f0c90e99f37dbd8db369b9982fd613e7, bcb295778afda4f2feb0d3c0289a53fd43d5a3a6.

Low priority for now. Upgrade to Linux Linux 25ec4779d0fb3ed9cac1e4d9e0e4261b4a12f6ed, 2882a4c4f0c90e99f37dbd8db369b9982fd613e7, bcb295778afda4f2feb0d3c0289a53fd43d5a3a6 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: bcache: fixup btree_cache_wait list damage We get a kernel crash about "list_add corruption. next->prev should be prev (ffff9c801bc01210), but was ffff9c77b688237c. (next=ffffae586d8afe68)." crash> struct list_head 0xffff9c801bc01210 struct list_head { next = 0xffffae586d8afe68, prev = 0xffffae586d8afe68 } crash> struct list_head 0xffff9c77b688237c struct list_head { next = 0x0, prev = 0x0 } crash> struct list_head 0xffffae586d8afe68 struct list_head struct: invalid kernel virtual address: ffffae586d8afe68 type: "gdb_readmem_callback" Cannot access memory at address 0xffffae586d8afe68 [230469.019492] Call Trace: [230469.032041] prepare_to_wait+0x8a/0xb0 [230469.044363] ? bch_btree_keys_free+0x6c/0xc0 [escache] [230469.056533] mca_cannibalize_lock+0x72/0x90 [escache] [230469.068788] mca_alloc+0x2ae/0x450 [escache] [230469.080790] bch_btree_node_get+0x136/0x2d0 [escache] [230469.092681] bch_btree_check_thread+0x1e1/0x260 [escache] [230469.104382] ? finish_wait+0x80/0x80 [230469.115884] ? bch_btree_check_recurse+0x1a0/0x1a0 [escache] [230469.127259] kthread+0x112/0x130 [230469.138448] ? kthread_flush_work_fn+0x10/0x10 [230469.149477] ret_from_fork+0x35/0x40 bch_btree_check_thread() and bch_dirty_init_thread() may call mca_cannibalize() to cannibalize other cached btree nodes. Only one thread can do it at a time, so the op of other threads will be added to the btree_cache_wait list. We must call finish_wait() to remove op from btree_cache_wait before free it's memory address. Otherwise, the list will be damaged. Also should call bch_cannibalize_unlock() to release the btree_cache_alloc_lock and wake_up other waiters.

—No exploit Fix available
Published
Dec 30, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 10th 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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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

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—

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

    • 5.7affected
    • 8e7102273f597dbb38af43da874f8c123f8e6dbe and later · before bcb295778afda4f2feb0d3c0289a53fd43d5a3a6affected · git
    • 8e7102273f597dbb38af43da874f8c123f8e6dbe and later · before cbdd5b3322f7bbe6454c97cac994757f1192c07baffected · git
    • 8e7102273f597dbb38af43da874f8c123f8e6dbe and later · before 25ec4779d0fb3ed9cac1e4d9e0e4261b4a12f6edaffected · git
    • 8e7102273f597dbb38af43da874f8c123f8e6dbe and later · before 2882a4c4f0c90e99f37dbd8db369b9982fd613e7affected · git
    • 8e7102273f597dbb38af43da874f8c123f8e6dbe and later · before f0854489fc07d2456f7cc71a63f4faf9c716ffbeaffected · git
    • before 5.7not affected · semver
    • 5.10.188 and later · up to and including 5.10.*not affected · semver
    • 5.15.121 and later · up to and including 5.15.*not affected · semver
    • 6.1.39 and later · up to and including 6.1.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.52-16.1.52-1
Debian:13linuxbefore 6.4.4-16.4.4-1

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-2023-54289Dec 30, 2025 · scsi: qedf: Fix NULL dereference in error handling
    0Monitor
  • ← EarlierCVE-2023-54291Dec 30, 2025 · vduse: fix NULL pointer dereference
    0Monitor
  • Later →CVE-2023-54294Dec 30, 2025 · md/raid10: fix memleak of md thread
    0Monitor

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 Linux25ec4779d0fb3ed9cac1e4d9e0e4261b4a12f6edVendor (CNA)
Linux Linux2882a4c4f0c90e99f37dbd8db369b9982fd613e7Vendor (CNA)
Linux Linuxbcb295778afda4f2feb0d3c0289a53fd43d5a3a6Vendor (CNA)
Linux Linuxcbdd5b3322f7bbe6454c97cac994757f1192c07bVendor (CNA)
Linux Linuxf0854489fc07d2456f7cc71a63f4faf9c716ffbeVendor (CNA)
debian:linux6.1.52-1 · 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

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No commit or PR link among the references.

Credits

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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 (4 more)

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

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