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Review reviewHigh

CVE-2024-50203

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: bpf, arm64: Fix address emission with tag-based KASAN enabled When BPF_TRAMP_F_CALL_ORIG is enabled, the address of a bpf_tramp_image struct on the stack is passed during the size calculation pass and an address on the heap is passed during code generation. This may cause a heap buffer overflow if the heap address is tagged because emit_a64_mov_i64() will emit longer code than it did during the size calculation pass. The same problem could occur without tag-based KASAN if one of the 16-bit words of the stack address happene...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2024.11.08
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: bpf, arm64: Fix address emission with tag-based KASAN enabled When BPF_TRAMP_F_CALL_ORIG is enabled, the address of a bpf_tramp_image struct on the stack is passed during the size calculation pass and an address on the heap is passed during code generation. This may cause a heap buffer overflow if the heap address is tagged because emit_a64_mov_i64() will emit longer code than it did during the size calculation pass. The same problem could occur without tag-based KASAN if one of the 16-bit words of the stack address happene...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 077149478497b2f00ff4fd9da2c892defa6418d8 < 9e80f366ebfdfafc685fe83a84c34f7ef01cbe88, >= d9664e6ff040798a46cdc5d401064f55b8676c83 < f521c2a0c0c4585f36d912bf62c852b88682c4f2, >= 19d3c179a37730caf600a97fed3794feac2b197b < 7db1a2121f3c7903b8e397392beec563c3d00950, >= 19d3c179a37730caf600a97fed3794feac2b197b < a552e2ef5fd1a6c78267cd4ec5a9b49aa11bbb1c, >= 6d218fcc707d6b2c3616b6cd24b948fd4825cfec, >= 6.10.3 < 6.11, >= 6.11, >= 6.11 < 6.11.6, 6.12
Fixed versions
6.11, 6.11.6

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel 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
CWE-787