[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2026-23438":6},{"stargazers_count":4,"fetched_at":5},7,"2026-07-30T21:17:53.703Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":11,"aliases":12,"duplicate_of":9,"upstream":13,"downstream":16,"duplicates":17,"related":18,"reserved_at":9,"published_at":19,"modified_at":20,"state":9,"summary":21,"references_raw":23,"kevs":30,"epss":9,"epss_history":31,"metrics":32,"affected":39},"DEBIAN-CVE-2026-23438","In the Linux kernel, the following vulnerability has been resolved:  net: mvpp2: guard flow control update with global_tx_fc in buffer switching  mvpp2_bm_switch_buffers() unconditionally calls mvpp2_bm_pool_update_priv_fc() when switching between per-cpu and shared buffer pool modes. This function programs CM3 flow control registers via mvpp2_cm3_read()/mvpp2_cm3_write(), which dereference priv->cm3_base without any NULL check.  When the CM3 SRAM resource is not present in the device tree (the third reg entry added by commit 60523583b07c (\"dts: marvell: add CM3 SRAM memory to cp11x ethernet device tree\")), priv->cm3_base remains NULL and priv->global_tx_fc is false. Any operation that triggers mvpp2_bm_switch_buffers(), for example an MTU change that crosses the jumbo frame threshold, will crash:    Unable to handle kernel NULL pointer dereference at   virtual address 0000000000000000   Mem abort info:     ESR = 0x0000000096000006     EC = 0x25: DABT (current EL), IL = 32 bits   pc : readl+0x0/0x18   lr : mvpp2_cm3_read.isra.0+0x14/0x20   Call trace:    readl+0x0/0x18    mvpp2_bm_pool_update_fc+0x40/0x12c    mvpp2_bm_pool_update_priv_fc+0x94/0xd8    mvpp2_bm_switch_buffers.isra.0+0x80/0x1c0    mvpp2_change_mtu+0x140/0x380    __dev_set_mtu+0x1c/0x38    dev_set_mtu_ext+0x78/0x118    dev_set_mtu+0x48/0xa8    dev_ifsioc+0x21c/0x43c    dev_ioctl+0x2d8/0x42c    sock_ioctl+0x314/0x378  Every other flow control call site in the driver already guards hardware access with either priv->global_tx_fc or port->tx_fc. mvpp2_bm_switch_buffers() is the only place that omits this check.  Add the missing priv->global_tx_fc guard to both the disable and re-enable calls in mvpp2_bm_switch_buffers(), consistent with the rest of the driver.",null,[],[],[],[14],{"_key":15},"CVE-2026-23438",[],[],[],"2026-04-03T16:16:25.540Z","2026-06-15T19:06:11.831344710Z",{"cisa_kev":22,"cisa_ransomware":22,"cisa_vendor":9,"epss_severity":9,"epss_score":9,"severity":9,"severity_score":9,"severity_version":9,"severity_source":9,"severity_vector":9,"severity_status":9},false,[24],{"url":25,"sources":26,"tags":28},"https://security-tracker.debian.org/tracker/CVE-2026-23438",[27],"osv_debian",[29],"Advisory",[],[],[33],{"source":27,"cvss_v2_0":9,"cvss_v3_0":9,"cvss_v3_1":34,"cvss_v4_0":9},{"baseScore":35,"baseSeverity":9,"vectorString":36,"impactScore":37,"exploitabilityScore":38},5.5,"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",6,4.6,[40,61],{"ecosystem":41,"name":42,"vendor":43,"product":42,"cpe_part":9,"purl_type":44,"purl_namespace":43,"purl_name":42,"source":9,"versions":45},"Debian","linux","debian","deb",[46,50,51,55,58],{"version":47,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"all",true,"ecosystem",{"version":47,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},{"version":52,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":53,"version_end_type":54,"fixed_in":9},"lt6_1_170_1","6.1.170-1","excluding",{"version":56,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":57,"version_end_type":54,"fixed_in":9},"lt6_12_85_1","6.12.85-1",{"version":59,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":60,"version_end_type":54,"fixed_in":9},"lt6_19_10_1","6.19.10-1",{"ecosystem":41,"name":62,"vendor":43,"product":62,"cpe_part":9,"purl_type":44,"purl_namespace":43,"purl_name":62,"source":9,"versions":63},"linux-6.1",[64],{"version":65,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":66,"version_end_type":54,"fixed_in":9},"lt6_1_170_1~deb11u1","6.1.170-1~deb11u1"]