staging: rtl8723bs: fix OOB read in WMM_param_handler()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74650
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:38 UTC
Updated2026-08-22 16:16:38 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB read in WMM_param_handler() WMM_param_handler() copies a fixed-size WMM parameter element out of a received information element without checking that the element is long enough, causing an out-of-bounds read for a short WMM IE. The handler reads sizeof(struct WMM_para_element) (18) bytes at pIE->data + 6, so it requires pIE->length to be at least 24 (WLAN_WMM_LEN), but it never validates the length. Two of its three callers reach it after matching only the WMM OUI: OnAssocRsp() in rtw_mlme_ext.c matches a 6-byte OUI, and join_cmd_hdl() matches a 4-byte OUI, before calling the handler. A vendor-specific IE carrying the WMM OUI but a length between 6 and 23, placed in an association response or in the IE blob handed to join_cmd_hdl(), passes the OUI check and then makes the memcmp() and memcpy() at pIE->data + 6 read past the end of the element. OnAssocRsp() parses a frame received from the AP, so this is reachable from a remote peer. The remaining caller in rtw_wlan_util.c already guards the handler with "pIE->length == WLAN_WMM_LEN". Move the equivalent check into the handler itself so every caller is covered; the sibling IE handlers in the same parsing loop (HT_caps_handler(), HT_info_handler(), ERP_IE_handler()) likewise bound their accesses by pIE->length.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b 6cdca4c8b64c15a3ab9ad7a85f482e9519eadf93 git Not specified
CNA Linux Linux affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b 2bee6f7a0f0125238951e31da2e96d06fe359043 git Not specified
CNA Linux Linux affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b 1158b9931207392d6dd136aa0c4be18893b50fa1 git Not specified
CNA Linux Linux affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b ce2399717de242344880044b91a20a712644fdfb git Not specified
CNA Linux Linux affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b e5b7610008f4e6a80c8b071aa77ddbd5e17ea472 git Not specified
CNA Linux Linux affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b e429c6dfd5d2324cd866daaf4c29d5cfe4dea0e4 git Not specified
CNA Linux Linux affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b ae21407350151bddfd4fea7aa39bd0643c0ca9d3 git Not specified
CNA Linux Linux affected 4.12 Not specified
CNA Linux Linux unaffected 4.12 semver Not specified
CNA Linux Linux unaffected 5.15.216 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.183 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.152 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.104 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.45 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.9 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/6cdca4c8b64c15a3ab9ad7a85f482e9519eadf93 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e429c6dfd5d2324cd866daaf4c29d5cfe4dea0e4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ce2399717de242344880044b91a20a712644fdfb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2bee6f7a0f0125238951e31da2e96d06fe359043 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ae21407350151bddfd4fea7aa39bd0643c0ca9d3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1158b9931207392d6dd136aa0c4be18893b50fa1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e5b7610008f4e6a80c8b071aa77ddbd5e17ea472 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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