bpf: fix check for attempt to corrupt spilled pointer (Linux Linux)

CVE-2023-52462
MEDIUM 5.5

At a glance

Source
NVD
EPSS
EPSS 0.23 % · percentile 13 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: fix check for attempt to corrupt spilled pointer When register is spilled onto a stack as a 1/2/4-byte register, we set slot_type[BPF_REG_SIZE - 1] (plus potentially few more below it, depending on actual spill size). So to check if some stack slot has spilled register we need to consult slot_type[7], not slot_type[0]. To avoid the need to remember and double-check this in the future, just use is_spilled_reg() helper.

Weaknesses (CWE)

  • CWE-476 — NULL Pointer Dereference

References

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:NNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected cdd73a5ed0840da88a3b9ad353f568e6f156d417 < 2757f17972d87773b3677777f5682510f13c66ef ; affected 07c286c10a9cedbd71f20269ff3a4e73d9aab2fe < 67e6707f07354ed1acb4e65552e97c60cf9d69cf ; affected 27113c59b6d0a587b29ae72d4ff3f832f58b0651 < fc3e3c50a0a4cac1463967c110686189e4a59104 ; affected 27113c59b6d0a587b29ae72d4ff3f832f58b0651 < 8dc15b0670594543c356567a1a45b0182ec63174 ; affected 27113c59b6d0a587b29ae72d4ff3f832f58b0651 < 40617d45ea05535105e202a8a819e388a2b1f036 ; affected 27113c59b6d0a587b29ae72d4ff3f832f58b0651 < ab125ed3ec1c10ccc36bc98c7a4256ad114a3dae
Linux · Linuxaffected 5.16 ; unaffected 0 < 5.16 ; unaffected 5.10.209 ≤ 5.10.* ; unaffected 5.15.148 ≤ 5.15.* ; unaffected 6.1.75 ≤ 6.1.* ; unaffected 6.6.14 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD