{"id":"CVE-2026-100076","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix xmit_frame/xmit_buf leaks on mgnt-frame error paths\n\nissue_beacon(), issue_probersp() and issue_asocrsp() obtain a management\nxmit_frame togethe…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix xmit_frame/xmit_buf leaks on mgnt-frame error paths\n\nissue_beacon(), issue_probersp() and issue_asocrsp() obtain a management\nxmit_frame togethe…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-401","CWE-772"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 4.12, < 6.18.52","linux_kernel >= 6.19, < 7.2.6"],"patched":["linux_kernel 7.2.6"],"published":"2026-09-25","updated":"2026-10-02","sourceUpdated":"2026-10-02T15:03:26.487","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-100076","references":[{"url":"https://git.kernel.org/stable/c/41b8209376dffbd7b0b85c8bc4697d9166ac62ef","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6c9f6a3b9fdd31a0836b681053155b5997c0156e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c48e5aa01525577d6b6e782962a5bfb0e1535cb5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100076.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-100076"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541414"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100076"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100076"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-100076.mbox"},{"url":"https://git.kernel.org/stable/c/17260b5215d4ced17a733e2c027a76290e476fad"},{"url":"https://git.kernel.org/stable/c/2f5e2752c2b4bad01df4523cfe2b41b702c60f00"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00155,"epssPercentile":0.0463,"ingestedAt":"2026-09-25T14:09:46.374Z","slug":"CVE-2026-100076","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix xmit_frame/xmit_buf leaks on mgnt-frame error paths\n\nissue_beacon(), issue_probersp() and issue_asocrsp() obtain a management\nxmit_frame together with its xmit_buf from the driver's fixed-size\nmanagement-TX pools via alloc_mgtxmitframe(). On the normal path the frame\nis handed to dump_mgntframe(), which transfers ownership and eventually\nreturns both objects to their pools (the frame and, for beacons, the buf\nin rtl8723bs_mgnt_xmit(); other bufs via the pending-xmitbuf/TX-completion\npath).\n\nSeveral error/edge paths return early after a successful\nalloc_mgtxmitframe() but before dump_mgntframe(), so ownership is never\ntransferred and neither object is freed:\n\n  - issue_beacon(): beacon larger than 512 bytes\n  - issue_probersp(): cur_network->ie_length > MAX_IE_SZ\n  - issue_probersp(): kzalloc() of the SSID scratch buffer fails\n  - issue_asocrsp(): pkt_type is neither ASSOCRSP nor REASSOCRSP\n\nBecause alloc_mgtxmitframe() removes the frame and buf from their free\nlists (list_del_init) without placing them on any pending list, an\norphaned pair is on no list and referenced by nobody, so it is only\nreclaimed at driver teardown. Repeated hits progressively exhaust the\nmanagement-TX pools until alloc_mgtxmitframe() returns NULL and the\ninterface can no longer send beacons or probe/assoc responses.\n\nFree the frame and buffer on these paths, matching the existing correct\nerror handling in issue_assocreq().\n\n## Affected\n\n- `linux_kernel >= 4.12, < 6.18.52`\n- `linux_kernel >= 6.19, < 7.2.6`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.2.6`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-10-02 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100076.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":214189,"id":"CVE-2026-100076","ts":1790841342829,"field":"cvss","old":null,"new":"5.5"},{"seq":214188,"id":"CVE-2026-100076","ts":1790841342829,"field":"severity","old":"none","new":"medium"}]}