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Review reviewHigh

CVE-2023-54127

Linux

In the Linux kernel, the following vulnerability has been resolved: fs/jfs: prevent double-free in dbUnmount() after failed jfs_remount() Syzkaller reported the following issue: ================================================================== BUG: KASAN: double-free in slab_free mm/slub.c:3787 [inline] BUG: KASAN: double-free in __kmem_cache_free+0x71/0x110 mm/slub.c:3800 Free of addr ffff888086408000 by task syz-executor.4/12750 [...] Call Trace: <TASK> [...] kasan_report_invalid_free+0xac/0xd0 mm/kasan/report.c:482 ____kasan_slab_free+0xfb/0x120 kasan_slab_free include/linux/kasan.h:177...

CVSS
7.8
EPSS
0.14%
3.92% percentile
CISA KEV
Not listed
Published
2025.12.24
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.14%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: fs/jfs: prevent double-free in dbUnmount() after failed jfs_remount() Syzkaller reported the following issue: ================================================================== BUG: KASAN: double-free in slab_free mm/slub.c:3787 [inline] BUG: KASAN: double-free in __kmem_cache_free+0x71/0x110 mm/slub.c:3800 Free of addr ffff888086408000 by task syz-executor.4/12750 [...] Call Trace: <TASK> [...] kasan_report_invalid_free+0xac/0xd0 mm/kasan/report.c:482 ____kasan_slab_free+0xfb/0x120 kasan_slab_free include/linux/kasan.h:177...

Affected product and versions

Product
Linux
Affected versions
>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 798c5f6f98bc9045593d4b3a65c32f05d97bd0e6, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < aef6507e85475e30831c30405d785c7ed976ea4a, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b12ccbfdf6539ef0157868f69fcae0b7f7a072b3, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6f8b34458948ffca2fe90cd8c614e3fa2ebe0b27, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < aa5b019a3e0f7f54f4e5370c1af827f6b00fd26b, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2f7a36448f51d08d3a83f1514abcca4b680bcd3c, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f71c4bb3ec08dfcbd201350a6a0a914c4e6a9e3f, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cade5397e5461295f3cb87880534b6a07cafa427, >= 2.6.12
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available
CVE-2023-54127 — Linux | SECUFOCUS NOW