CVE - CVE-2024-49850

CVE-ID
CVE-2024-49850	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos In case of malformed relocation record of kind BPF_CORE_TYPE_ID_LOCAL referencing a non-existing BTF type, function bpf_core_calc_relo_insn would cause a null pointer deference. Fix this by adding a proper check upper in call stack, as malformed relocation records could be passed from user space. Simplest reproducer is a program: r0 = 0 exit With a single relocation record: .insn_off = 0, /* patch first instruction / .type_id = 100500, / this type id does not exist / .access_str_off = 6, / offset of string "0" */ .kind = BPF_CORE_TYPE_ID_LOCAL, See the link for original reproducer or next commit for a test case.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/2288b54b96dcb55bedebcef3572bb8821fc5e708 URL:https://git.kernel.org/stable/c/2288b54b96dcb55bedebcef3572bb8821fc5e708 MISC:https://git.kernel.org/stable/c/3d2786d65aaa954ebd3fcc033ada433e10da21c4 URL:https://git.kernel.org/stable/c/3d2786d65aaa954ebd3fcc033ada433e10da21c4 MISC:https://git.kernel.org/stable/c/584cd3ff792e1edbea20b2a7df55897159b0be3e URL:https://git.kernel.org/stable/c/584cd3ff792e1edbea20b2a7df55897159b0be3e MISC:https://git.kernel.org/stable/c/dc7ce14f00bcd50641f2110b7a32aa6552e0780f URL:https://git.kernel.org/stable/c/dc7ce14f00bcd50641f2110b7a32aa6552e0780f MISC:https://git.kernel.org/stable/c/e7e9c5b2dda29067332df2a85b0141a92b41f218 URL:https://git.kernel.org/stable/c/e7e9c5b2dda29067332df2a85b0141a92b41f218
Assigning CNA
kernel.org
Date Record Created
20241021	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241021)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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