CVE-2023-52462

bpf: fix check for attempt to corrupt spilled pointer

State: Published
Severity: Not scored
Published: Feb 23, 2024
Updated: May 23, 2026
Reserved: Feb 20, 2024

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.

Scores

The record has no CVSS score.

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
LinuxLinux	cdd73a5ed0840da88a3b9ad353f568e6f156d417 to before 2757f17972d87773b3677777f5682510f13c66efAffected 07c286c10a9cedbd71f20269ff3a4e73d9aab2fe to before 67e6707f07354ed1acb4e65552e97c60cf9d69cfAffected 27113c59b6d0a587b29ae72d4ff3f832f58b0651 to before fc3e3c50a0a4cac1463967c110686189e4a59104Affected 27113c59b6d0a587b29ae72d4ff3f832f58b0651 to before 8dc15b0670594543c356567a1a45b0182ec63174Affected 27113c59b6d0a587b29ae72d4ff3f832f58b0651 to before 40617d45ea05535105e202a8a819e388a2b1f036Affected 27113c59b6d0a587b29ae72d4ff3f832f58b0651 to before ab125ed3ec1c10ccc36bc98c7a4256ad114a3daeAffected 5.10.163 to before 5.10.209Affected 5.15.86 to before 5.15.148Affected
LinuxLinux	5.16Affected before 5.16Not affected 5.10.209 through 5.10.Not affected 5.15.148 through 5.15.Not affected 6.1.75 through 6.1.Not affected 6.6.14 through 6.6.Not affected 6.7.2 through 6.7.*Not affected 6.8 and laterNot affected

Product

Versions

LinuxLinux

cdd73a5ed0840da88a3b9ad353f568e6f156d417 to before 2757f17972d87773b3677777f5682510f13c66efAffected
07c286c10a9cedbd71f20269ff3a4e73d9aab2fe to before 67e6707f07354ed1acb4e65552e97c60cf9d69cfAffected
27113c59b6d0a587b29ae72d4ff3f832f58b0651 to before fc3e3c50a0a4cac1463967c110686189e4a59104Affected
27113c59b6d0a587b29ae72d4ff3f832f58b0651 to before 8dc15b0670594543c356567a1a45b0182ec63174Affected
27113c59b6d0a587b29ae72d4ff3f832f58b0651 to before 40617d45ea05535105e202a8a819e388a2b1f036Affected
27113c59b6d0a587b29ae72d4ff3f832f58b0651 to before ab125ed3ec1c10ccc36bc98c7a4256ad114a3daeAffected
5.10.163 to before 5.10.209Affected
5.15.86 to before 5.15.148Affected

LinuxLinux

5.16Affected
before 5.16Not affected
5.10.209 through 5.10.*Not affected
5.15.148 through 5.15.*Not affected
6.1.75 through 6.1.*Not affected
6.6.14 through 6.6.*Not affected
6.7.2 through 6.7.*Not affected
6.8 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.